| /* Compiler driver program that can handle many languages. |
| Copyright (C) 1987-2021 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* This program is the user interface to the C compiler and possibly to |
| other compilers. It is used because compilation is a complicated procedure |
| which involves running several programs and passing temporary files between |
| them, forwarding the users switches to those programs selectively, |
| and deleting the temporary files at the end. |
| |
| CC recognizes how to compile each input file by suffixes in the file names. |
| Once it knows which kind of compilation to perform, the procedure for |
| compilation is specified by a string called a "spec". */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "multilib.h" /* before tm.h */ |
| #include "tm.h" |
| #include "xregex.h" |
| #include "obstack.h" |
| #include "intl.h" |
| #include "prefix.h" |
| #include "opt-suggestions.h" |
| #include "gcc.h" |
| #include "diagnostic.h" |
| #include "flags.h" |
| #include "opts.h" |
| #include "filenames.h" |
| #include "spellcheck.h" |
| |
| |
| |
| /* Manage the manipulation of env vars. |
| |
| We poison "getenv" and "putenv", so that all enviroment-handling is |
| done through this class. Note that poisoning happens in the |
| preprocessor at the identifier level, and doesn't distinguish between |
| env.getenv (); |
| and |
| getenv (); |
| Hence we need to use "get" for the accessor method, not "getenv". */ |
| |
| struct env_manager |
| { |
| public: |
| void init (bool can_restore, bool debug); |
| const char *get (const char *name); |
| void xput (const char *string); |
| void restore (); |
| |
| private: |
| bool m_can_restore; |
| bool m_debug; |
| struct kv |
| { |
| char *m_key; |
| char *m_value; |
| }; |
| vec<kv> m_keys; |
| |
| }; |
| |
| /* The singleton instance of class env_manager. */ |
| |
| static env_manager env; |
| |
| /* Initializer for class env_manager. |
| |
| We can't do this as a constructor since we have a statically |
| allocated instance ("env" above). */ |
| |
| void |
| env_manager::init (bool can_restore, bool debug) |
| { |
| m_can_restore = can_restore; |
| m_debug = debug; |
| } |
| |
| /* Get the value of NAME within the environment. Essentially |
| a wrapper for ::getenv, but adding logging, and the possibility |
| of caching results. */ |
| |
| const char * |
| env_manager::get (const char *name) |
| { |
| const char *result = ::getenv (name); |
| if (m_debug) |
| fprintf (stderr, "env_manager::getenv (%s) -> %s\n", name, result); |
| return result; |
| } |
| |
| /* Put the given KEY=VALUE entry STRING into the environment. |
| If the env_manager was initialized with CAN_RESTORE set, then |
| also record the old value of KEY within the environment, so that it |
| can be later restored. */ |
| |
| void |
| env_manager::xput (const char *string) |
| { |
| if (m_debug) |
| fprintf (stderr, "env_manager::xput (%s)\n", string); |
| if (verbose_flag) |
| fnotice (stderr, "%s\n", string); |
| |
| if (m_can_restore) |
| { |
| char *equals = strchr (const_cast <char *> (string), '='); |
| gcc_assert (equals); |
| |
| struct kv kv; |
| kv.m_key = xstrndup (string, equals - string); |
| const char *cur_value = ::getenv (kv.m_key); |
| if (m_debug) |
| fprintf (stderr, "saving old value: %s\n",cur_value); |
| kv.m_value = cur_value ? xstrdup (cur_value) : NULL; |
| m_keys.safe_push (kv); |
| } |
| |
| ::putenv (CONST_CAST (char *, string)); |
| } |
| |
| /* Undo any xputenv changes made since last restore. |
| Can only be called if the env_manager was initialized with |
| CAN_RESTORE enabled. */ |
| |
| void |
| env_manager::restore () |
| { |
| unsigned int i; |
| struct kv *item; |
| |
| gcc_assert (m_can_restore); |
| |
| FOR_EACH_VEC_ELT_REVERSE (m_keys, i, item) |
| { |
| if (m_debug) |
| printf ("restoring saved key: %s value: %s\n", item->m_key, item->m_value); |
| if (item->m_value) |
| ::setenv (item->m_key, item->m_value, 1); |
| else |
| ::unsetenv (item->m_key); |
| free (item->m_key); |
| free (item->m_value); |
| } |
| |
| m_keys.truncate (0); |
| } |
| |
| /* Forbid other uses of getenv and putenv. */ |
| #if (GCC_VERSION >= 3000) |
| #pragma GCC poison getenv putenv |
| #endif |
| |
| |
| |
| /* By default there is no special suffix for target executables. */ |
| #ifdef TARGET_EXECUTABLE_SUFFIX |
| #define HAVE_TARGET_EXECUTABLE_SUFFIX |
| #else |
| #define TARGET_EXECUTABLE_SUFFIX "" |
| #endif |
| |
| /* By default there is no special suffix for host executables. */ |
| #ifdef HOST_EXECUTABLE_SUFFIX |
| #define HAVE_HOST_EXECUTABLE_SUFFIX |
| #else |
| #define HOST_EXECUTABLE_SUFFIX "" |
| #endif |
| |
| /* By default, the suffix for target object files is ".o". */ |
| #ifdef TARGET_OBJECT_SUFFIX |
| #define HAVE_TARGET_OBJECT_SUFFIX |
| #else |
| #define TARGET_OBJECT_SUFFIX ".o" |
| #endif |
| |
| static const char dir_separator_str[] = { DIR_SEPARATOR, 0 }; |
| |
| /* Most every one is fine with LIBRARY_PATH. For some, it conflicts. */ |
| #ifndef LIBRARY_PATH_ENV |
| #define LIBRARY_PATH_ENV "LIBRARY_PATH" |
| #endif |
| |
| /* If a stage of compilation returns an exit status >= 1, |
| compilation of that file ceases. */ |
| |
| #define MIN_FATAL_STATUS 1 |
| |
| /* Flag set by cppspec.c to 1. */ |
| int is_cpp_driver; |
| |
| /* Flag set to nonzero if an @file argument has been supplied to gcc. */ |
| static bool at_file_supplied; |
| |
| /* Definition of string containing the arguments given to configure. */ |
| #include "configargs.h" |
| |
| /* Flag saying to print the command line options understood by gcc and its |
| sub-processes. */ |
| |
| static int print_help_list; |
| |
| /* Flag saying to print the version of gcc and its sub-processes. */ |
| |
| static int print_version; |
| |
| /* Flag that stores string prefix for which we provide bash completion. */ |
| |
| static const char *completion = NULL; |
| |
| /* Flag indicating whether we should ONLY print the command and |
| arguments (like verbose_flag) without executing the command. |
| Displayed arguments are quoted so that the generated command |
| line is suitable for execution. This is intended for use in |
| shell scripts to capture the driver-generated command line. */ |
| static int verbose_only_flag; |
| |
| /* Flag indicating how to print command line options of sub-processes. */ |
| |
| static int print_subprocess_help; |
| |
| /* Linker suffix passed to -fuse-ld=... */ |
| static const char *use_ld; |
| |
| /* Whether we should report subprocess execution times to a file. */ |
| |
| FILE *report_times_to_file = NULL; |
| |
| /* Nonzero means place this string before uses of /, so that include |
| and library files can be found in an alternate location. */ |
| |
| #ifdef TARGET_SYSTEM_ROOT |
| #define DEFAULT_TARGET_SYSTEM_ROOT (TARGET_SYSTEM_ROOT) |
| #else |
| #define DEFAULT_TARGET_SYSTEM_ROOT (0) |
| #endif |
| static const char *target_system_root = DEFAULT_TARGET_SYSTEM_ROOT; |
| |
| /* Nonzero means pass the updated target_system_root to the compiler. */ |
| |
| static int target_system_root_changed; |
| |
| /* Nonzero means append this string to target_system_root. */ |
| |
| static const char *target_sysroot_suffix = 0; |
| |
| /* Nonzero means append this string to target_system_root for headers. */ |
| |
| static const char *target_sysroot_hdrs_suffix = 0; |
| |
| /* Nonzero means write "temp" files in source directory |
| and use the source file's name in them, and don't delete them. */ |
| |
| static enum save_temps { |
| SAVE_TEMPS_NONE, /* no -save-temps */ |
| SAVE_TEMPS_CWD, /* -save-temps in current directory */ |
| SAVE_TEMPS_DUMP, /* -save-temps in dumpdir */ |
| SAVE_TEMPS_OBJ /* -save-temps in object directory */ |
| } save_temps_flag; |
| |
| /* Set this iff the dumppfx implied by a -save-temps=* option is to |
| override a -dumpdir option, if any. */ |
| static bool save_temps_overrides_dumpdir = false; |
| |
| /* -dumpdir, -dumpbase and -dumpbase-ext flags passed in, possibly |
| rearranged as they are to be passed down, e.g., dumpbase and |
| dumpbase_ext may be cleared if integrated with dumpdir or |
| dropped. */ |
| static char *dumpdir, *dumpbase, *dumpbase_ext; |
| |
| /* Usually the length of the string in dumpdir. However, during |
| linking, it may be shortened to omit a driver-added trailing dash, |
| by then replaced with a trailing period, that is still to be passed |
| to sub-processes in -dumpdir, but not to be generally used in spec |
| filename expansions. See maybe_run_linker. */ |
| static size_t dumpdir_length = 0; |
| |
| /* Set if the last character in dumpdir is (or was) a dash that the |
| driver added to dumpdir after dumpbase or linker output name. */ |
| static bool dumpdir_trailing_dash_added = false; |
| |
| /* Basename of dump and aux outputs, computed from dumpbase (given or |
| derived from output name), to override input_basename in non-%w %b |
| et al. */ |
| static char *outbase; |
| static size_t outbase_length = 0; |
| |
| /* The compiler version. */ |
| |
| static const char *compiler_version; |
| |
| /* The target version. */ |
| |
| static const char *const spec_version = DEFAULT_TARGET_VERSION; |
| |
| /* The target machine. */ |
| |
| static const char *spec_machine = DEFAULT_TARGET_MACHINE; |
| static const char *spec_host_machine = DEFAULT_REAL_TARGET_MACHINE; |
| |
| /* List of offload targets. Separated by colon. Empty string for |
| -foffload=disable. */ |
| |
| static char *offload_targets = NULL; |
| |
| #if OFFLOAD_DEFAULTED |
| /* Set to true if -foffload has not been used and offload_targets |
| is set to the configured in default. */ |
| static bool offload_targets_default; |
| #endif |
| |
| /* Nonzero if cross-compiling. |
| When -b is used, the value comes from the `specs' file. */ |
| |
| #ifdef CROSS_DIRECTORY_STRUCTURE |
| static const char *cross_compile = "1"; |
| #else |
| static const char *cross_compile = "0"; |
| #endif |
| |
| /* Greatest exit code of sub-processes that has been encountered up to |
| now. */ |
| static int greatest_status = 1; |
| |
| /* This is the obstack which we use to allocate many strings. */ |
| |
| static struct obstack obstack; |
| |
| /* This is the obstack to build an environment variable to pass to |
| collect2 that describes all of the relevant switches of what to |
| pass the compiler in building the list of pointers to constructors |
| and destructors. */ |
| |
| static struct obstack collect_obstack; |
| |
| /* Forward declaration for prototypes. */ |
| struct path_prefix; |
| struct prefix_list; |
| |
| static void init_spec (void); |
| static void store_arg (const char *, int, int); |
| static void insert_wrapper (const char *); |
| static char *load_specs (const char *); |
| static void read_specs (const char *, bool, bool); |
| static void set_spec (const char *, const char *, bool); |
| static struct compiler *lookup_compiler (const char *, size_t, const char *); |
| static char *build_search_list (const struct path_prefix *, const char *, |
| bool, bool); |
| static void xputenv (const char *); |
| static void putenv_from_prefixes (const struct path_prefix *, const char *, |
| bool); |
| static int access_check (const char *, int); |
| static char *find_a_file (const struct path_prefix *, const char *, int, bool); |
| static char *find_a_program (const char *); |
| static void add_prefix (struct path_prefix *, const char *, const char *, |
| int, int, int); |
| static void add_sysrooted_prefix (struct path_prefix *, const char *, |
| const char *, int, int, int); |
| static char *skip_whitespace (char *); |
| static void delete_if_ordinary (const char *); |
| static void delete_temp_files (void); |
| static void delete_failure_queue (void); |
| static void clear_failure_queue (void); |
| static int check_live_switch (int, int); |
| static const char *handle_braces (const char *); |
| static inline bool input_suffix_matches (const char *, const char *); |
| static inline bool switch_matches (const char *, const char *, int); |
| static inline void mark_matching_switches (const char *, const char *, int); |
| static inline void process_marked_switches (void); |
| static const char *process_brace_body (const char *, const char *, const char *, int, int); |
| static const struct spec_function *lookup_spec_function (const char *); |
| static const char *eval_spec_function (const char *, const char *, const char *); |
| static const char *handle_spec_function (const char *, bool *, const char *); |
| static char *save_string (const char *, int); |
| static void set_collect_gcc_options (void); |
| static int do_spec_1 (const char *, int, const char *); |
| static int do_spec_2 (const char *, const char *); |
| static void do_option_spec (const char *, const char *); |
| static void do_self_spec (const char *); |
| static const char *find_file (const char *); |
| static int is_directory (const char *, bool); |
| static const char *validate_switches (const char *, bool, bool); |
| static void validate_all_switches (void); |
| static inline void validate_switches_from_spec (const char *, bool); |
| static void give_switch (int, int); |
| static int default_arg (const char *, int); |
| static void set_multilib_dir (void); |
| static void print_multilib_info (void); |
| static void display_help (void); |
| static void add_preprocessor_option (const char *, int); |
| static void add_assembler_option (const char *, int); |
| static void add_linker_option (const char *, int); |
| static void process_command (unsigned int, struct cl_decoded_option *); |
| static int execute (void); |
| static void alloc_args (void); |
| static void clear_args (void); |
| static void fatal_signal (int); |
| #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) |
| static void init_gcc_specs (struct obstack *, const char *, const char *, |
| const char *); |
| #endif |
| #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX) |
| static const char *convert_filename (const char *, int, int); |
| #endif |
| |
| static void try_generate_repro (const char **argv); |
| static const char *getenv_spec_function (int, const char **); |
| static const char *if_exists_spec_function (int, const char **); |
| static const char *if_exists_else_spec_function (int, const char **); |
| static const char *if_exists_then_else_spec_function (int, const char **); |
| static const char *sanitize_spec_function (int, const char **); |
| static const char *replace_outfile_spec_function (int, const char **); |
| static const char *remove_outfile_spec_function (int, const char **); |
| static const char *version_compare_spec_function (int, const char **); |
| static const char *include_spec_function (int, const char **); |
| static const char *find_file_spec_function (int, const char **); |
| static const char *find_plugindir_spec_function (int, const char **); |
| static const char *print_asm_header_spec_function (int, const char **); |
| static const char *compare_debug_dump_opt_spec_function (int, const char **); |
| static const char *compare_debug_self_opt_spec_function (int, const char **); |
| static const char *pass_through_libs_spec_func (int, const char **); |
| static const char *dumps_spec_func (int, const char **); |
| static const char *greater_than_spec_func (int, const char **); |
| static const char *debug_level_greater_than_spec_func (int, const char **); |
| static const char *dwarf_version_greater_than_spec_func (int, const char **); |
| static const char *find_fortran_preinclude_file (int, const char **); |
| static char *convert_white_space (char *); |
| static char *quote_spec (char *); |
| static char *quote_spec_arg (char *); |
| static bool not_actual_file_p (const char *); |
| |
| |
| /* The Specs Language |
| |
| Specs are strings containing lines, each of which (if not blank) |
| is made up of a program name, and arguments separated by spaces. |
| The program name must be exact and start from root, since no path |
| is searched and it is unreliable to depend on the current working directory. |
| Redirection of input or output is not supported; the subprograms must |
| accept filenames saying what files to read and write. |
| |
| In addition, the specs can contain %-sequences to substitute variable text |
| or for conditional text. Here is a table of all defined %-sequences. |
| Note that spaces are not generated automatically around the results of |
| expanding these sequences; therefore, you can concatenate them together |
| or with constant text in a single argument. |
| |
| %% substitute one % into the program name or argument. |
| %" substitute an empty argument. |
| %i substitute the name of the input file being processed. |
| %b substitute the basename for outputs related with the input file |
| being processed. This is often a substring of the input file name, |
| up to (and not including) the last period but, unless %w is active, |
| it is affected by the directory selected by -save-temps=*, by |
| -dumpdir, and, in case of multiple compilations, even by -dumpbase |
| and -dumpbase-ext and, in case of linking, by the linker output |
| name. When %w is active, it derives the main output name only from |
| the input file base name; when it is not, it names aux/dump output |
| file. |
| %B same as %b, but include the input file suffix (text after the last |
| period). |
| %gSUFFIX |
| substitute a file name that has suffix SUFFIX and is chosen |
| once per compilation, and mark the argument a la %d. To reduce |
| exposure to denial-of-service attacks, the file name is now |
| chosen in a way that is hard to predict even when previously |
| chosen file names are known. For example, `%g.s ... %g.o ... %g.s' |
| might turn into `ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s'. SUFFIX matches |
| the regexp "[.0-9A-Za-z]*%O"; "%O" is treated exactly as if it |
| had been pre-processed. Previously, %g was simply substituted |
| with a file name chosen once per compilation, without regard |
| to any appended suffix (which was therefore treated just like |
| ordinary text), making such attacks more likely to succeed. |
| %|SUFFIX |
| like %g, but if -pipe is in effect, expands simply to "-". |
| %mSUFFIX |
| like %g, but if -pipe is in effect, expands to nothing. (We have both |
| %| and %m to accommodate differences between system assemblers; see |
| the AS_NEEDS_DASH_FOR_PIPED_INPUT target macro.) |
| %uSUFFIX |
| like %g, but generates a new temporary file name even if %uSUFFIX |
| was already seen. |
| %USUFFIX |
| substitutes the last file name generated with %uSUFFIX, generating a |
| new one if there is no such last file name. In the absence of any |
| %uSUFFIX, this is just like %gSUFFIX, except they don't share |
| the same suffix "space", so `%g.s ... %U.s ... %g.s ... %U.s' |
| would involve the generation of two distinct file names, one |
| for each `%g.s' and another for each `%U.s'. Previously, %U was |
| simply substituted with a file name chosen for the previous %u, |
| without regard to any appended suffix. |
| %jSUFFIX |
| substitutes the name of the HOST_BIT_BUCKET, if any, and if it is |
| writable, and if save-temps is off; otherwise, substitute the name |
| of a temporary file, just like %u. This temporary file is not |
| meant for communication between processes, but rather as a junk |
| disposal mechanism. |
| %.SUFFIX |
| substitutes .SUFFIX for the suffixes of a matched switch's args when |
| it is subsequently output with %*. SUFFIX is terminated by the next |
| space or %. |
| %d marks the argument containing or following the %d as a |
| temporary file name, so that file will be deleted if GCC exits |
| successfully. Unlike %g, this contributes no text to the argument. |
| %w marks the argument containing or following the %w as the |
| "output file" of this compilation. This puts the argument |
| into the sequence of arguments that %o will substitute later. |
| %V indicates that this compilation produces no "output file". |
| %W{...} |
| like %{...} but marks the last argument supplied within as a file |
| to be deleted on failure. |
| %@{...} |
| like %{...} but puts the result into a FILE and substitutes @FILE |
| if an @file argument has been supplied. |
| %o substitutes the names of all the output files, with spaces |
| automatically placed around them. You should write spaces |
| around the %o as well or the results are undefined. |
| %o is for use in the specs for running the linker. |
| Input files whose names have no recognized suffix are not compiled |
| at all, but they are included among the output files, so they will |
| be linked. |
| %O substitutes the suffix for object files. Note that this is |
| handled specially when it immediately follows %g, %u, or %U |
| (with or without a suffix argument) because of the need for |
| those to form complete file names. The handling is such that |
| %O is treated exactly as if it had already been substituted, |
| except that %g, %u, and %U do not currently support additional |
| SUFFIX characters following %O as they would following, for |
| example, `.o'. |
| %I Substitute any of -iprefix (made from GCC_EXEC_PREFIX), -isysroot |
| (made from TARGET_SYSTEM_ROOT), -isystem (made from COMPILER_PATH |
| and -B options) and -imultilib as necessary. |
| %s current argument is the name of a library or startup file of some sort. |
| Search for that file in a standard list of directories |
| and substitute the full name found. |
| %T current argument is the name of a linker script. |
| Search for that file in the current list of directories to scan for |
| libraries. If the file is located, insert a --script option into the |
| command line followed by the full path name found. If the file is |
| not found then generate an error message. |
| Note: the current working directory is not searched. |
| %eSTR Print STR as an error message. STR is terminated by a newline. |
| Use this when inconsistent options are detected. |
| %nSTR Print STR as a notice. STR is terminated by a newline. |
| %x{OPTION} Accumulate an option for %X. |
| %X Output the accumulated linker options specified by compilations. |
| %Y Output the accumulated assembler options specified by compilations. |
| %Z Output the accumulated preprocessor options specified by compilations. |
| %a process ASM_SPEC as a spec. |
| This allows config.h to specify part of the spec for running as. |
| %A process ASM_FINAL_SPEC as a spec. A capital A is actually |
| used here. This can be used to run a post-processor after the |
| assembler has done its job. |
| %D Dump out a -L option for each directory in startfile_prefixes. |
| If multilib_dir is set, extra entries are generated with it affixed. |
| %l process LINK_SPEC as a spec. |
| %L process LIB_SPEC as a spec. |
| %M Output multilib_os_dir. |
| %G process LIBGCC_SPEC as a spec. |
| %R Output the concatenation of target_system_root and |
| target_sysroot_suffix. |
| %S process STARTFILE_SPEC as a spec. A capital S is actually used here. |
| %E process ENDFILE_SPEC as a spec. A capital E is actually used here. |
| %C process CPP_SPEC as a spec. |
| %1 process CC1_SPEC as a spec. |
| %2 process CC1PLUS_SPEC as a spec. |
| %* substitute the variable part of a matched option. (See below.) |
| Note that each comma in the substituted string is replaced by |
| a single space. A space is appended after the last substition |
| unless there is more text in current sequence. |
| %<S remove all occurrences of -S from the command line. |
| Note - this command is position dependent. % commands in the |
| spec string before this one will see -S, % commands in the |
| spec string after this one will not. |
| %>S Similar to "%<S", but keep it in the GCC command line. |
| %<S* remove all occurrences of all switches beginning with -S from the |
| command line. |
| %:function(args) |
| Call the named function FUNCTION, passing it ARGS. ARGS is |
| first processed as a nested spec string, then split into an |
| argument vector in the usual fashion. The function returns |
| a string which is processed as if it had appeared literally |
| as part of the current spec. |
| %{S} substitutes the -S switch, if that switch was given to GCC. |
| If that switch was not specified, this substitutes nothing. |
| Here S is a metasyntactic variable. |
| %{S*} substitutes all the switches specified to GCC whose names start |
| with -S. This is used for -o, -I, etc; switches that take |
| arguments. GCC considers `-o foo' as being one switch whose |
| name starts with `o'. %{o*} would substitute this text, |
| including the space; thus, two arguments would be generated. |
| %{S*&T*} likewise, but preserve order of S and T options (the order |
| of S and T in the spec is not significant). Can be any number |
| of ampersand-separated variables; for each the wild card is |
| optional. Useful for CPP as %{D*&U*&A*}. |
| |
| %{S:X} substitutes X, if the -S switch was given to GCC. |
| %{!S:X} substitutes X, if the -S switch was NOT given to GCC. |
| %{S*:X} substitutes X if one or more switches whose names start |
| with -S was given to GCC. Normally X is substituted only |
| once, no matter how many such switches appeared. However, |
| if %* appears somewhere in X, then X will be substituted |
| once for each matching switch, with the %* replaced by the |
| part of that switch that matched the '*'. A space will be |
| appended after the last substition unless there is more |
| text in current sequence. |
| %{.S:X} substitutes X, if processing a file with suffix S. |
| %{!.S:X} substitutes X, if NOT processing a file with suffix S. |
| %{,S:X} substitutes X, if processing a file which will use spec S. |
| %{!,S:X} substitutes X, if NOT processing a file which will use spec S. |
| |
| %{S|T:X} substitutes X if either -S or -T was given to GCC. This may be |
| combined with '!', '.', ',', and '*' as above binding stronger |
| than the OR. |
| If %* appears in X, all of the alternatives must be starred, and |
| only the first matching alternative is substituted. |
| %{%:function(args):X} |
| Call function named FUNCTION with args ARGS. If the function |
| returns non-NULL, then X is substituted, if it returns |
| NULL, it isn't substituted. |
| %{S:X; if S was given to GCC, substitutes X; |
| T:Y; else if T was given to GCC, substitutes Y; |
| :D} else substitutes D. There can be as many clauses as you need. |
| This may be combined with '.', '!', ',', '|', and '*' as above. |
| |
| %(Spec) processes a specification defined in a specs file as *Spec: |
| |
| The switch matching text S in a %{S}, %{S:X}, or similar construct can use |
| a backslash to ignore the special meaning of the character following it, |
| thus allowing literal matching of a character that is otherwise specially |
| treated. For example, %{std=iso9899\:1999:X} substitutes X if the |
| -std=iso9899:1999 option is given. |
| |
| The conditional text X in a %{S:X} or similar construct may contain |
| other nested % constructs or spaces, or even newlines. They are |
| processed as usual, as described above. Trailing white space in X is |
| ignored. White space may also appear anywhere on the left side of the |
| colon in these constructs, except between . or * and the corresponding |
| word. |
| |
| The -O, -f, -g, -m, and -W switches are handled specifically in these |
| constructs. If another value of -O or the negated form of a -f, -m, or |
| -W switch is found later in the command line, the earlier switch |
| value is ignored, except with {S*} where S is just one letter; this |
| passes all matching options. |
| |
| The character | at the beginning of the predicate text is used to indicate |
| that a command should be piped to the following command, but only if -pipe |
| is specified. |
| |
| Note that it is built into GCC which switches take arguments and which |
| do not. You might think it would be useful to generalize this to |
| allow each compiler's spec to say which switches take arguments. But |
| this cannot be done in a consistent fashion. GCC cannot even decide |
| which input files have been specified without knowing which switches |
| take arguments, and it must know which input files to compile in order |
| to tell which compilers to run. |
| |
| GCC also knows implicitly that arguments starting in `-l' are to be |
| treated as compiler output files, and passed to the linker in their |
| proper position among the other output files. */ |
| |
| /* Define the macros used for specs %a, %l, %L, %S, %C, %1. */ |
| |
| /* config.h can define ASM_SPEC to provide extra args to the assembler |
| or extra switch-translations. */ |
| #ifndef ASM_SPEC |
| #define ASM_SPEC "" |
| #endif |
| |
| /* config.h can define ASM_FINAL_SPEC to run a post processor after |
| the assembler has run. */ |
| #ifndef ASM_FINAL_SPEC |
| #define ASM_FINAL_SPEC \ |
| "%{gsplit-dwarf: \n\ |
| objcopy --extract-dwo \ |
| %{c:%{o*:%*}%{!o*:%w%b%O}}%{!c:%U%O} \ |
| %b.dwo \n\ |
| objcopy --strip-dwo \ |
| %{c:%{o*:%*}%{!o*:%w%b%O}}%{!c:%U%O} \ |
| }" |
| #endif |
| |
| /* config.h can define CPP_SPEC to provide extra args to the C preprocessor |
| or extra switch-translations. */ |
| #ifndef CPP_SPEC |
| #define CPP_SPEC "" |
| #endif |
| |
| /* config.h can define CC1_SPEC to provide extra args to cc1 and cc1plus |
| or extra switch-translations. */ |
| #ifndef CC1_SPEC |
| #define CC1_SPEC "" |
| #endif |
| |
| /* config.h can define CC1PLUS_SPEC to provide extra args to cc1plus |
| or extra switch-translations. */ |
| #ifndef CC1PLUS_SPEC |
| #define CC1PLUS_SPEC "" |
| #endif |
| |
| /* config.h can define LINK_SPEC to provide extra args to the linker |
| or extra switch-translations. */ |
| #ifndef LINK_SPEC |
| #define LINK_SPEC "" |
| #endif |
| |
| /* config.h can define LIB_SPEC to override the default libraries. */ |
| #ifndef LIB_SPEC |
| #define LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" |
| #endif |
| |
| /* When using -fsplit-stack we need to wrap pthread_create, in order |
| to initialize the stack guard. We always use wrapping, rather than |
| shared library ordering, and we keep the wrapper function in |
| libgcc. This is not yet a real spec, though it could become one; |
| it is currently just stuffed into LINK_SPEC. FIXME: This wrapping |
| only works with GNU ld and gold. */ |
| #ifdef HAVE_GOLD_NON_DEFAULT_SPLIT_STACK |
| #define STACK_SPLIT_SPEC " %{fsplit-stack: -fuse-ld=gold --wrap=pthread_create}" |
| #else |
| #define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}" |
| #endif |
| |
| #ifndef LIBASAN_SPEC |
| #define STATIC_LIBASAN_LIBS \ |
| " %{static-libasan|static:%:include(libsanitizer.spec)%(link_libasan)}" |
| #ifdef LIBASAN_EARLY_SPEC |
| #define LIBASAN_SPEC STATIC_LIBASAN_LIBS |
| #elif defined(HAVE_LD_STATIC_DYNAMIC) |
| #define LIBASAN_SPEC "%{static-libasan:" LD_STATIC_OPTION \ |
| "} -lasan %{static-libasan:" LD_DYNAMIC_OPTION "}" \ |
| STATIC_LIBASAN_LIBS |
| #else |
| #define LIBASAN_SPEC "-lasan" STATIC_LIBASAN_LIBS |
| #endif |
| #endif |
| |
| #ifndef LIBASAN_EARLY_SPEC |
| #define LIBASAN_EARLY_SPEC "" |
| #endif |
| |
| #ifndef LIBHWASAN_SPEC |
| #define STATIC_LIBHWASAN_LIBS \ |
| " %{static-libhwasan|static:%:include(libsanitizer.spec)%(link_libhwasan)}" |
| #ifdef LIBHWASAN_EARLY_SPEC |
| #define LIBHWASAN_SPEC STATIC_LIBHWASAN_LIBS |
| #elif defined(HAVE_LD_STATIC_DYNAMIC) |
| #define LIBHWASAN_SPEC "%{static-libhwasan:" LD_STATIC_OPTION \ |
| "} -lhwasan %{static-libhwasan:" LD_DYNAMIC_OPTION "}" \ |
| STATIC_LIBHWASAN_LIBS |
| #else |
| #define LIBHWASAN_SPEC "-lhwasan" STATIC_LIBHWASAN_LIBS |
| #endif |
| #endif |
| |
| #ifndef LIBHWASAN_EARLY_SPEC |
| #define LIBHWASAN_EARLY_SPEC "" |
| #endif |
| |
| #ifndef LIBTSAN_SPEC |
| #define STATIC_LIBTSAN_LIBS \ |
| " %{static-libtsan|static:%:include(libsanitizer.spec)%(link_libtsan)}" |
| #ifdef LIBTSAN_EARLY_SPEC |
| #define LIBTSAN_SPEC STATIC_LIBTSAN_LIBS |
| #elif defined(HAVE_LD_STATIC_DYNAMIC) |
| #define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION \ |
| "} -ltsan %{static-libtsan:" LD_DYNAMIC_OPTION "}" \ |
| STATIC_LIBTSAN_LIBS |
| #else |
| #define LIBTSAN_SPEC "-ltsan" STATIC_LIBTSAN_LIBS |
| #endif |
| #endif |
| |
| #ifndef LIBTSAN_EARLY_SPEC |
| #define LIBTSAN_EARLY_SPEC "" |
| #endif |
| |
| #ifndef LIBLSAN_SPEC |
| #define STATIC_LIBLSAN_LIBS \ |
| " %{static-liblsan|static:%:include(libsanitizer.spec)%(link_liblsan)}" |
| #ifdef LIBLSAN_EARLY_SPEC |
| #define LIBLSAN_SPEC STATIC_LIBLSAN_LIBS |
| #elif defined(HAVE_LD_STATIC_DYNAMIC) |
| #define LIBLSAN_SPEC "%{static-liblsan:" LD_STATIC_OPTION \ |
| "} -llsan %{static-liblsan:" LD_DYNAMIC_OPTION "}" \ |
| STATIC_LIBLSAN_LIBS |
| #else |
| #define LIBLSAN_SPEC "-llsan" STATIC_LIBLSAN_LIBS |
| #endif |
| #endif |
| |
| #ifndef LIBLSAN_EARLY_SPEC |
| #define LIBLSAN_EARLY_SPEC "" |
| #endif |
| |
| #ifndef LIBUBSAN_SPEC |
| #define STATIC_LIBUBSAN_LIBS \ |
| " %{static-libubsan|static:%:include(libsanitizer.spec)%(link_libubsan)}" |
| #ifdef HAVE_LD_STATIC_DYNAMIC |
| #define LIBUBSAN_SPEC "%{static-libubsan:" LD_STATIC_OPTION \ |
| "} -lubsan %{static-libubsan:" LD_DYNAMIC_OPTION "}" \ |
| STATIC_LIBUBSAN_LIBS |
| #else |
| #define LIBUBSAN_SPEC "-lubsan" STATIC_LIBUBSAN_LIBS |
| #endif |
| #endif |
| |
| /* Linker options for compressed debug sections. */ |
| #if HAVE_LD_COMPRESS_DEBUG == 0 |
| /* No linker support. */ |
| #define LINK_COMPRESS_DEBUG_SPEC \ |
| " %{gz*:%e-gz is not supported in this configuration} " |
| #elif HAVE_LD_COMPRESS_DEBUG == 1 |
| /* GNU style on input, GNU ld options. Reject, not useful. */ |
| #define LINK_COMPRESS_DEBUG_SPEC \ |
| " %{gz*:%e-gz is not supported in this configuration} " |
| #elif HAVE_LD_COMPRESS_DEBUG == 2 |
| /* GNU style, GNU gold options. */ |
| #define LINK_COMPRESS_DEBUG_SPEC \ |
| " %{gz|gz=zlib-gnu:" LD_COMPRESS_DEBUG_OPTION "=zlib}" \ |
| " %{gz=none:" LD_COMPRESS_DEBUG_OPTION "=none}" \ |
| " %{gz=zlib:%e-gz=zlib is not supported in this configuration} " |
| #elif HAVE_LD_COMPRESS_DEBUG == 3 |
| /* ELF gABI style. */ |
| #define LINK_COMPRESS_DEBUG_SPEC \ |
| " %{gz|gz=zlib:" LD_COMPRESS_DEBUG_OPTION "=zlib}" \ |
| " %{gz=none:" LD_COMPRESS_DEBUG_OPTION "=none}" \ |
| " %{gz=zlib-gnu:" LD_COMPRESS_DEBUG_OPTION "=zlib-gnu} " |
| #else |
| #error Unknown value for HAVE_LD_COMPRESS_DEBUG. |
| #endif |
| |
| /* config.h can define LIBGCC_SPEC to override how and when libgcc.a is |
| included. */ |
| #ifndef LIBGCC_SPEC |
| #if defined(REAL_LIBGCC_SPEC) |
| #define LIBGCC_SPEC REAL_LIBGCC_SPEC |
| #elif defined(LINK_LIBGCC_SPECIAL_1) |
| /* Have gcc do the search for libgcc.a. */ |
| #define LIBGCC_SPEC "libgcc.a%s" |
| #else |
| #define LIBGCC_SPEC "-lgcc" |
| #endif |
| #endif |
| |
| /* config.h can define STARTFILE_SPEC to override the default crt0 files. */ |
| #ifndef STARTFILE_SPEC |
| #define STARTFILE_SPEC \ |
| "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}" |
| #endif |
| |
| /* config.h can define ENDFILE_SPEC to override the default crtn files. */ |
| #ifndef ENDFILE_SPEC |
| #define ENDFILE_SPEC "" |
| #endif |
| |
| #ifndef LINKER_NAME |
| #define LINKER_NAME "collect2" |
| #endif |
| |
| #ifdef HAVE_AS_DEBUG_PREFIX_MAP |
| #define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}" |
| #else |
| #define ASM_MAP "" |
| #endif |
| |
| /* Assembler options for compressed debug sections. */ |
| #if HAVE_LD_COMPRESS_DEBUG < 2 |
| /* Reject if the linker cannot write compressed debug sections. */ |
| #define ASM_COMPRESS_DEBUG_SPEC \ |
| " %{gz*:%e-gz is not supported in this configuration} " |
| #else /* HAVE_LD_COMPRESS_DEBUG >= 2 */ |
| #if HAVE_AS_COMPRESS_DEBUG == 0 |
| /* No assembler support. Ignore silently. */ |
| #define ASM_COMPRESS_DEBUG_SPEC \ |
| " %{gz*:} " |
| #elif HAVE_AS_COMPRESS_DEBUG == 1 |
| /* GNU style, GNU as options. */ |
| #define ASM_COMPRESS_DEBUG_SPEC \ |
| " %{gz|gz=zlib-gnu:" AS_COMPRESS_DEBUG_OPTION "}" \ |
| " %{gz=none:" AS_NO_COMPRESS_DEBUG_OPTION "}" \ |
| " %{gz=zlib:%e-gz=zlib is not supported in this configuration} " |
| #elif HAVE_AS_COMPRESS_DEBUG == 2 |
| /* ELF gABI style. */ |
| #define ASM_COMPRESS_DEBUG_SPEC \ |
| " %{gz|gz=zlib:" AS_COMPRESS_DEBUG_OPTION "=zlib}" \ |
| " %{gz=none:" AS_COMPRESS_DEBUG_OPTION "=none}" \ |
| " %{gz=zlib-gnu:" AS_COMPRESS_DEBUG_OPTION "=zlib-gnu} " |
| #else |
| #error Unknown value for HAVE_AS_COMPRESS_DEBUG. |
| #endif |
| #endif /* HAVE_LD_COMPRESS_DEBUG >= 2 */ |
| |
| /* Define ASM_DEBUG_SPEC to be a spec suitable for translating '-g' |
| to the assembler, when compiling assembly sources only. */ |
| #ifndef ASM_DEBUG_SPEC |
| # if defined(HAVE_AS_GDWARF_5_DEBUG_FLAG) && defined(HAVE_AS_WORKING_DWARF_N_FLAG) |
| /* If --gdwarf-N is supported and as can handle even compiler generated |
| .debug_line with it, supply --gdwarf-N in ASM_DEBUG_OPTION_SPEC rather |
| than in ASM_DEBUG_SPEC, so that it applies to both .s and .c etc. |
| compilations. */ |
| # define ASM_DEBUG_DWARF_OPTION "" |
| # elif defined(HAVE_AS_GDWARF_5_DEBUG_FLAG) && !defined(HAVE_LD_BROKEN_PE_DWARF5) |
| # define ASM_DEBUG_DWARF_OPTION "%{%:dwarf-version-gt(4):--gdwarf-5;" \ |
| "%:dwarf-version-gt(3):--gdwarf-4;" \ |
| "%:dwarf-version-gt(2):--gdwarf-3;" \ |
| ":--gdwarf2}" |
| # else |
| # define ASM_DEBUG_DWARF_OPTION "--gdwarf2" |
| # endif |
| # if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) \ |
| && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) |
| # define ASM_DEBUG_SPEC \ |
| (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG \ |
| ? "%{%:debug-level-gt(0):" \ |
| "%{gdwarf*:" ASM_DEBUG_DWARF_OPTION "};" \ |
| ":%{g*:--gstabs}}" ASM_MAP \ |
| : "%{%:debug-level-gt(0):" \ |
| "%{gstabs*:--gstabs;" \ |
| ":%{g*:" ASM_DEBUG_DWARF_OPTION "}}}" ASM_MAP) |
| # else |
| # if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) |
| # define ASM_DEBUG_SPEC "%{g*:%{%:debug-level-gt(0):--gstabs}}" ASM_MAP |
| # endif |
| # if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) |
| # define ASM_DEBUG_SPEC "%{g*:%{%:debug-level-gt(0):" \ |
| ASM_DEBUG_DWARF_OPTION "}}" ASM_MAP |
| # endif |
| # endif |
| #endif |
| #ifndef ASM_DEBUG_SPEC |
| # define ASM_DEBUG_SPEC "" |
| #endif |
| |
| /* Define ASM_DEBUG_OPTION_SPEC to be a spec suitable for translating '-g' |
| to the assembler when compiling all sources. */ |
| #ifndef ASM_DEBUG_OPTION_SPEC |
| # if defined(HAVE_AS_GDWARF_5_DEBUG_FLAG) && defined(HAVE_AS_WORKING_DWARF_N_FLAG) |
| # define ASM_DEBUG_OPTION_DWARF_OPT \ |
| "%{%:dwarf-version-gt(4):--gdwarf-5 ;" \ |
| "%:dwarf-version-gt(3):--gdwarf-4 ;" \ |
| "%:dwarf-version-gt(2):--gdwarf-3 ;" \ |
| ":--gdwarf2 }" |
| # if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) |
| # define ASM_DEBUG_OPTION_SPEC \ |
| (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG \ |
| ? "%{%:debug-level-gt(0):" \ |
| "%{gdwarf*:" ASM_DEBUG_OPTION_DWARF_OPT "}}" \ |
| : "%{%:debug-level-gt(0):" \ |
| "%{!gstabs*:%{g*:" ASM_DEBUG_OPTION_DWARF_OPT "}}}") |
| # elif defined(DWARF2_DEBUGGING_INFO) |
| # define ASM_DEBUG_OPTION_SPEC "%{g*:%{%:debug-level-gt(0):" \ |
| ASM_DEBUG_OPTION_DWARF_OPT "}}" |
| # endif |
| # endif |
| #endif |
| #ifndef ASM_DEBUG_OPTION_SPEC |
| # define ASM_DEBUG_OPTION_SPEC "" |
| #endif |
| |
| /* Here is the spec for running the linker, after compiling all files. */ |
| |
| /* This is overridable by the target in case they need to specify the |
| -lgcc and -lc order specially, yet not require them to override all |
| of LINK_COMMAND_SPEC. */ |
| #ifndef LINK_GCC_C_SEQUENCE_SPEC |
| #define LINK_GCC_C_SEQUENCE_SPEC "%G %{!nolibc:%L %G}" |
| #endif |
| |
| #ifndef LINK_SSP_SPEC |
| #ifdef TARGET_LIBC_PROVIDES_SSP |
| #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \ |
| "|fstack-protector-strong|fstack-protector-explicit:}" |
| #else |
| #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \ |
| "|fstack-protector-strong|fstack-protector-explicit" \ |
| ":-lssp_nonshared -lssp}" |
| #endif |
| #endif |
| |
| #ifdef ENABLE_DEFAULT_PIE |
| #define PIE_SPEC "!no-pie" |
| #define NO_FPIE1_SPEC "fno-pie" |
| #define FPIE1_SPEC NO_FPIE1_SPEC ":;" |
| #define NO_FPIE2_SPEC "fno-PIE" |
| #define FPIE2_SPEC NO_FPIE2_SPEC ":;" |
| #define NO_FPIE_SPEC NO_FPIE1_SPEC "|" NO_FPIE2_SPEC |
| #define FPIE_SPEC NO_FPIE_SPEC ":;" |
| #define NO_FPIC1_SPEC "fno-pic" |
| #define FPIC1_SPEC NO_FPIC1_SPEC ":;" |
| #define NO_FPIC2_SPEC "fno-PIC" |
| #define FPIC2_SPEC NO_FPIC2_SPEC ":;" |
| #define NO_FPIC_SPEC NO_FPIC1_SPEC "|" NO_FPIC2_SPEC |
| #define FPIC_SPEC NO_FPIC_SPEC ":;" |
| #define NO_FPIE1_AND_FPIC1_SPEC NO_FPIE1_SPEC "|" NO_FPIC1_SPEC |
| #define FPIE1_OR_FPIC1_SPEC NO_FPIE1_AND_FPIC1_SPEC ":;" |
| #define NO_FPIE2_AND_FPIC2_SPEC NO_FPIE2_SPEC "|" NO_FPIC2_SPEC |
| #define FPIE2_OR_FPIC2_SPEC NO_FPIE2_AND_FPIC2_SPEC ":;" |
| #define NO_FPIE_AND_FPIC_SPEC NO_FPIE_SPEC "|" NO_FPIC_SPEC |
| #define FPIE_OR_FPIC_SPEC NO_FPIE_AND_FPIC_SPEC ":;" |
| #else |
| #define PIE_SPEC "pie" |
| #define FPIE1_SPEC "fpie" |
| #define NO_FPIE1_SPEC FPIE1_SPEC ":;" |
| #define FPIE2_SPEC "fPIE" |
| #define NO_FPIE2_SPEC FPIE2_SPEC ":;" |
| #define FPIE_SPEC FPIE1_SPEC "|" FPIE2_SPEC |
| #define NO_FPIE_SPEC FPIE_SPEC ":;" |
| #define FPIC1_SPEC "fpic" |
| #define NO_FPIC1_SPEC FPIC1_SPEC ":;" |
| #define FPIC2_SPEC "fPIC" |
| #define NO_FPIC2_SPEC FPIC2_SPEC ":;" |
| #define FPIC_SPEC FPIC1_SPEC "|" FPIC2_SPEC |
| #define NO_FPIC_SPEC FPIC_SPEC ":;" |
| #define FPIE1_OR_FPIC1_SPEC FPIE1_SPEC "|" FPIC1_SPEC |
| #define NO_FPIE1_AND_FPIC1_SPEC FPIE1_OR_FPIC1_SPEC ":;" |
| #define FPIE2_OR_FPIC2_SPEC FPIE2_SPEC "|" FPIC2_SPEC |
| #define NO_FPIE2_AND_FPIC2_SPEC FPIE1_OR_FPIC2_SPEC ":;" |
| #define FPIE_OR_FPIC_SPEC FPIE_SPEC "|" FPIC_SPEC |
| #define NO_FPIE_AND_FPIC_SPEC FPIE_OR_FPIC_SPEC ":;" |
| #endif |
| |
| #ifndef LINK_PIE_SPEC |
| #ifdef HAVE_LD_PIE |
| #ifndef LD_PIE_SPEC |
| #define LD_PIE_SPEC "-pie" |
| #endif |
| #else |
| #define LD_PIE_SPEC "" |
| #endif |
| #define LINK_PIE_SPEC "%{static|shared|r:;" PIE_SPEC ":" LD_PIE_SPEC "} " |
| #endif |
| |
| #ifndef LINK_BUILDID_SPEC |
| # if defined(HAVE_LD_BUILDID) && defined(ENABLE_LD_BUILDID) |
| # define LINK_BUILDID_SPEC "%{!r:--build-id} " |
| # endif |
| #endif |
| |
| #ifndef LTO_PLUGIN_SPEC |
| #define LTO_PLUGIN_SPEC "" |
| #endif |
| |
| /* Conditional to test whether the LTO plugin is used or not. |
| FIXME: For slim LTO we will need to enable plugin unconditionally. This |
| still cause problems with PLUGIN_LD != LD and when plugin is built but |
| not useable. For GCC 4.6 we don't support slim LTO and thus we can enable |
| plugin only when LTO is enabled. We still honor explicit |
| -fuse-linker-plugin if the linker used understands -plugin. */ |
| |
| /* The linker has some plugin support. */ |
| #if HAVE_LTO_PLUGIN > 0 |
| /* The linker used has full plugin support, use LTO plugin by default. */ |
| #if HAVE_LTO_PLUGIN == 2 |
| #define PLUGIN_COND "!fno-use-linker-plugin:%{!fno-lto" |
| #define PLUGIN_COND_CLOSE "}" |
| #else |
| /* The linker used has limited plugin support, use LTO plugin with explicit |
| -fuse-linker-plugin. */ |
| #define PLUGIN_COND "fuse-linker-plugin" |
| #define PLUGIN_COND_CLOSE "" |
| #endif |
| #define LINK_PLUGIN_SPEC \ |
| "%{" PLUGIN_COND": \ |
| -plugin %(linker_plugin_file) \ |
| -plugin-opt=%(lto_wrapper) \ |
| -plugin-opt=-fresolution=%u.res \ |
| " LTO_PLUGIN_SPEC "\ |
| %{flinker-output=*:-plugin-opt=-linker-output-known} \ |
| %{!nostdlib:%{!nodefaultlibs:%:pass-through-libs(%(link_gcc_c_sequence))}} \ |
| }" PLUGIN_COND_CLOSE |
| #else |
| /* The linker used doesn't support -plugin, reject -fuse-linker-plugin. */ |
| #define LINK_PLUGIN_SPEC "%{fuse-linker-plugin:\ |
| %e-fuse-linker-plugin is not supported in this configuration}" |
| #endif |
| |
| /* Linker command line options for -fsanitize= early on the command line. */ |
| #ifndef SANITIZER_EARLY_SPEC |
| #define SANITIZER_EARLY_SPEC "\ |
| %{!nostdlib:%{!r:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_EARLY_SPEC "} \ |
| %{%:sanitize(hwaddress):" LIBHWASAN_EARLY_SPEC "} \ |
| %{%:sanitize(thread):" LIBTSAN_EARLY_SPEC "} \ |
| %{%:sanitize(leak):" LIBLSAN_EARLY_SPEC "}}}}" |
| #endif |
| |
| /* Linker command line options for -fsanitize= late on the command line. */ |
| #ifndef SANITIZER_SPEC |
| #define SANITIZER_SPEC "\ |
| %{!nostdlib:%{!r:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_SPEC "\ |
| %{static:%ecannot specify -static with -fsanitize=address}}\ |
| %{%:sanitize(hwaddress):" LIBHWASAN_SPEC "\ |
| %{static:%ecannot specify -static with -fsanitize=hwaddress}}\ |
| %{%:sanitize(thread):" LIBTSAN_SPEC "\ |
| %{static:%ecannot specify -static with -fsanitize=thread}}\ |
| %{%:sanitize(undefined):" LIBUBSAN_SPEC "}\ |
| %{%:sanitize(leak):" LIBLSAN_SPEC "}}}}" |
| #endif |
| |
| #ifndef POST_LINK_SPEC |
| #define POST_LINK_SPEC "" |
| #endif |
| |
| /* This is the spec to use, once the code for creating the vtable |
| verification runtime library, libvtv.so, has been created. Currently |
| the vtable verification runtime functions are in libstdc++, so we use |
| the spec just below this one. */ |
| #ifndef VTABLE_VERIFICATION_SPEC |
| #if ENABLE_VTABLE_VERIFY |
| #define VTABLE_VERIFICATION_SPEC "\ |
| %{!nostdlib:%{!r:%{fvtable-verify=std: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}\ |
| %{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}}}" |
| #else |
| #define VTABLE_VERIFICATION_SPEC "\ |
| %{fvtable-verify=none:} \ |
| %{fvtable-verify=std: \ |
| %e-fvtable-verify=std is not supported in this configuration} \ |
| %{fvtable-verify=preinit: \ |
| %e-fvtable-verify=preinit is not supported in this configuration}" |
| #endif |
| #endif |
| |
| /* -u* was put back because both BSD and SysV seem to support it. */ |
| /* %{static|no-pie|static-pie:} simply prevents an error message: |
| 1. If the target machine doesn't handle -static. |
| 2. If PIE isn't enabled by default. |
| 3. If the target machine doesn't handle -static-pie. |
| */ |
| /* We want %{T*} after %{L*} and %D so that it can be used to specify linker |
| scripts which exist in user specified directories, or in standard |
| directories. */ |
| /* We pass any -flto flags on to the linker, which is expected |
| to understand them. In practice, this means it had better be collect2. */ |
| /* %{e*} includes -export-dynamic; see comment in common.opt. */ |
| #ifndef LINK_COMMAND_SPEC |
| #define LINK_COMMAND_SPEC "\ |
| %{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\ |
| %(linker) " \ |
| LINK_PLUGIN_SPEC \ |
| "%{flto|flto=*:%<fcompare-debug*} \ |
| %{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \ |
| "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \ |
| "%X %{o*} %{e*} %{N} %{n} %{r}\ |
| %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!r:%{!nostartfiles:%S}}} \ |
| %{static|no-pie|static-pie:} %@{L*} %(mfwrap) %(link_libgcc) " \ |
| VTABLE_VERIFICATION_SPEC " " SANITIZER_EARLY_SPEC " %o "" \ |
| %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\ |
| %:include(libgomp.spec)%(link_gomp)}\ |
| %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\ |
| %(mflib) " STACK_SPLIT_SPEC "\ |
| %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \ |
| %{!nostdlib:%{!r:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}}\ |
| %{!nostdlib:%{!r:%{!nostartfiles:%E}}} %{T*} \n%(post_link) }}}}}}" |
| #endif |
| |
| #ifndef LINK_LIBGCC_SPEC |
| /* Generate -L options for startfile prefix list. */ |
| # define LINK_LIBGCC_SPEC "%D" |
| #endif |
| |
| #ifndef STARTFILE_PREFIX_SPEC |
| # define STARTFILE_PREFIX_SPEC "" |
| #endif |
| |
| #ifndef SYSROOT_SPEC |
| # define SYSROOT_SPEC "--sysroot=%R" |
| #endif |
| |
| #ifndef SYSROOT_SUFFIX_SPEC |
| # define SYSROOT_SUFFIX_SPEC "" |
| #endif |
| |
| #ifndef SYSROOT_HEADERS_SUFFIX_SPEC |
| # define SYSROOT_HEADERS_SUFFIX_SPEC "" |
| #endif |
| |
| static const char *asm_debug = ASM_DEBUG_SPEC; |
| static const char *asm_debug_option = ASM_DEBUG_OPTION_SPEC; |
| static const char *cpp_spec = CPP_SPEC; |
| static const char *cc1_spec = CC1_SPEC; |
| static const char *cc1plus_spec = CC1PLUS_SPEC; |
| static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC; |
| static const char *link_ssp_spec = LINK_SSP_SPEC; |
| static const char *asm_spec = ASM_SPEC; |
| static const char *asm_final_spec = ASM_FINAL_SPEC; |
| static const char *link_spec = LINK_SPEC; |
| static const char *lib_spec = LIB_SPEC; |
| static const char *link_gomp_spec = ""; |
| static const char *libgcc_spec = LIBGCC_SPEC; |
| static const char *endfile_spec = ENDFILE_SPEC; |
| static const char *startfile_spec = STARTFILE_SPEC; |
| static const char *linker_name_spec = LINKER_NAME; |
| static const char *linker_plugin_file_spec = ""; |
| static const char *lto_wrapper_spec = ""; |
| static const char *lto_gcc_spec = ""; |
| static const char *post_link_spec = POST_LINK_SPEC; |
| static const char *link_command_spec = LINK_COMMAND_SPEC; |
| static const char *link_libgcc_spec = LINK_LIBGCC_SPEC; |
| static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC; |
| static const char *sysroot_spec = SYSROOT_SPEC; |
| static const char *sysroot_suffix_spec = SYSROOT_SUFFIX_SPEC; |
| static const char *sysroot_hdrs_suffix_spec = SYSROOT_HEADERS_SUFFIX_SPEC; |
| static const char *self_spec = ""; |
| |
| /* Standard options to cpp, cc1, and as, to reduce duplication in specs. |
| There should be no need to override these in target dependent files, |
| but we need to copy them to the specs file so that newer versions |
| of the GCC driver can correctly drive older tool chains with the |
| appropriate -B options. */ |
| |
| /* When cpplib handles traditional preprocessing, get rid of this, and |
| call cc1 (or cc1obj in objc/lang-specs.h) from the main specs so |
| that we default the front end language better. */ |
| static const char *trad_capable_cpp = |
| "cc1 -E %{traditional|traditional-cpp:-traditional-cpp}"; |
| |
| /* We don't wrap .d files in %W{} since a missing .d file, and |
| therefore no dependency entry, confuses make into thinking a .o |
| file that happens to exist is up-to-date. */ |
| static const char *cpp_unique_options = |
| "%{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %@{I*&F*} %{P} %I\ |
| %{MD:-MD %{!o:%b.d}%{o*:%.d%*}}\ |
| %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}}\ |
| %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*}\ |
| %{Mmodules} %{Mno-modules}\ |
| %{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\ |
| %{remap} %{%:debug-level-gt(2):-dD}\ |
| %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ |
| %{H} %C %{D*&U*&A*} %{i*} %Z %i\ |
| %{E|M|MM:%W{o*}}"; |
| |
| /* This contains cpp options which are common with cc1_options and are passed |
| only when preprocessing only to avoid duplication. We pass the cc1 spec |
| options to the preprocessor so that it the cc1 spec may manipulate |
| options used to set target flags. Those special target flags settings may |
| in turn cause preprocessor symbols to be defined specially. */ |
| static const char *cpp_options = |
| "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\ |
| %{f*} %{g*:%{%:debug-level-gt(0):%{g*}\ |
| %{!fno-working-directory:-fworking-directory}}} %{O*}\ |
| %{undef} %{save-temps*:-fpch-preprocess}"; |
| |
| /* Pass -d* flags, possibly modifying -dumpdir, -dumpbase et al. |
| |
| Make it easy for a language to override the argument for the |
| %:dumps specs function call. */ |
| #define DUMPS_OPTIONS(EXTS) \ |
| "%<dumpdir %<dumpbase %<dumpbase-ext %{d*} %:dumps(" EXTS ")" |
| |
| /* This contains cpp options which are not passed when the preprocessor |
| output will be used by another program. */ |
| static const char *cpp_debug_options = DUMPS_OPTIONS (""); |
| |
| /* NB: This is shared amongst all front-ends, except for Ada. */ |
| static const char *cc1_options = |
| "%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\ |
| %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ |
| %1 %{!Q:-quiet} %(cpp_debug_options) %{m*} %{aux-info*}\ |
| %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\ |
| %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\ |
| %{Qn:-fno-ident} %{Qy:} %{-help:--help}\ |
| %{-target-help:--target-help}\ |
| %{-version:--version}\ |
| %{-help=*:--help=%*}\ |
| %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %w%b.s}}}\ |
| %{fsyntax-only:-o %j} %{-param*}\ |
| %{coverage:-fprofile-arcs -ftest-coverage}\ |
| %{fprofile-arcs|fprofile-generate*|coverage:\ |
| %{!fprofile-update=single:\ |
| %{pthread:-fprofile-update=prefer-atomic}}}"; |
| |
| static const char *asm_options = |
| "%{-target-help:%:print-asm-header()} " |
| #if HAVE_GNU_AS |
| /* If GNU AS is used, then convert -w (no warnings), -I, and -v |
| to the assembler equivalents. */ |
| "%{v} %{w:-W} %{I*} " |
| #endif |
| "%(asm_debug_option)" |
| ASM_COMPRESS_DEBUG_SPEC |
| "%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}"; |
| |
| static const char *invoke_as = |
| #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT |
| "%{!fwpa*:\ |
| %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ |
| %{!S:-o %|.s |\n as %(asm_options) %|.s %A }\ |
| }"; |
| #else |
| "%{!fwpa*:\ |
| %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ |
| %{!S:-o %|.s |\n as %(asm_options) %m.s %A }\ |
| }"; |
| #endif |
| |
| /* Some compilers have limits on line lengths, and the multilib_select |
| and/or multilib_matches strings can be very long, so we build them at |
| run time. */ |
| static struct obstack multilib_obstack; |
| static const char *multilib_select; |
| static const char *multilib_matches; |
| static const char *multilib_defaults; |
| static const char *multilib_exclusions; |
| static const char *multilib_reuse; |
| |
| /* Check whether a particular argument is a default argument. */ |
| |
| #ifndef MULTILIB_DEFAULTS |
| #define MULTILIB_DEFAULTS { "" } |
| #endif |
| |
| static const char *const multilib_defaults_raw[] = MULTILIB_DEFAULTS; |
| |
| #ifndef DRIVER_SELF_SPECS |
| #define DRIVER_SELF_SPECS "" |
| #endif |
| |
| /* Linking to libgomp implies pthreads. This is particularly important |
| for targets that use different start files and suchlike. */ |
| #ifndef GOMP_SELF_SPECS |
| #define GOMP_SELF_SPECS \ |
| "%{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): " \ |
| "-pthread}" |
| #endif |
| |
| /* Likewise for -fgnu-tm. */ |
| #ifndef GTM_SELF_SPECS |
| #define GTM_SELF_SPECS "%{fgnu-tm: -pthread}" |
| #endif |
| |
| static const char *const driver_self_specs[] = { |
| "%{fdump-final-insns:-fdump-final-insns=.} %<fdump-final-insns", |
| DRIVER_SELF_SPECS, CONFIGURE_SPECS, GOMP_SELF_SPECS, GTM_SELF_SPECS |
| }; |
| |
| #ifndef OPTION_DEFAULT_SPECS |
| #define OPTION_DEFAULT_SPECS { "", "" } |
| #endif |
| |
| struct default_spec |
| { |
| const char *name; |
| const char *spec; |
| }; |
| |
| static const struct default_spec |
| option_default_specs[] = { OPTION_DEFAULT_SPECS }; |
| |
| struct user_specs |
| { |
| struct user_specs *next; |
| const char *filename; |
| }; |
| |
| static struct user_specs *user_specs_head, *user_specs_tail; |
| |
| |
| /* Record the mapping from file suffixes for compilation specs. */ |
| |
| struct compiler |
| { |
| const char *suffix; /* Use this compiler for input files |
| whose names end in this suffix. */ |
| |
| const char *spec; /* To use this compiler, run this spec. */ |
| |
| const char *cpp_spec; /* If non-NULL, substitute this spec |
| for `%C', rather than the usual |
| cpp_spec. */ |
| int combinable; /* If nonzero, compiler can deal with |
| multiple source files at once (IMA). */ |
| int needs_preprocessing; /* If nonzero, source files need to |
| be run through a preprocessor. */ |
| }; |
| |
| /* Pointer to a vector of `struct compiler' that gives the spec for |
| compiling a file, based on its suffix. |
| A file that does not end in any of these suffixes will be passed |
| unchanged to the loader and nothing else will be done to it. |
| |
| An entry containing two 0s is used to terminate the vector. |
| |
| If multiple entries match a file, the last matching one is used. */ |
| |
| static struct compiler *compilers; |
| |
| /* Number of entries in `compilers', not counting the null terminator. */ |
| |
| static int n_compilers; |
| |
| /* The default list of file name suffixes and their compilation specs. */ |
| |
| static const struct compiler default_compilers[] = |
| { |
| /* Add lists of suffixes of known languages here. If those languages |
| were not present when we built the driver, we will hit these copies |
| and be given a more meaningful error than "file not used since |
| linking is not done". */ |
| {".m", "#Objective-C", 0, 0, 0}, {".mi", "#Objective-C", 0, 0, 0}, |
| {".mm", "#Objective-C++", 0, 0, 0}, {".M", "#Objective-C++", 0, 0, 0}, |
| {".mii", "#Objective-C++", 0, 0, 0}, |
| {".cc", "#C++", 0, 0, 0}, {".cxx", "#C++", 0, 0, 0}, |
| {".cpp", "#C++", 0, 0, 0}, {".cp", "#C++", 0, 0, 0}, |
| {".c++", "#C++", 0, 0, 0}, {".C", "#C++", 0, 0, 0}, |
| {".CPP", "#C++", 0, 0, 0}, {".ii", "#C++", 0, 0, 0}, |
| {".ads", "#Ada", 0, 0, 0}, {".adb", "#Ada", 0, 0, 0}, |
| {".f", "#Fortran", 0, 0, 0}, {".F", "#Fortran", 0, 0, 0}, |
| {".for", "#Fortran", 0, 0, 0}, {".FOR", "#Fortran", 0, 0, 0}, |
| {".ftn", "#Fortran", 0, 0, 0}, {".FTN", "#Fortran", 0, 0, 0}, |
| {".fpp", "#Fortran", 0, 0, 0}, {".FPP", "#Fortran", 0, 0, 0}, |
| {".f90", "#Fortran", 0, 0, 0}, {".F90", "#Fortran", 0, 0, 0}, |
| {".f95", "#Fortran", 0, 0, 0}, {".F95", "#Fortran", 0, 0, 0}, |
| {".f03", "#Fortran", 0, 0, 0}, {".F03", "#Fortran", 0, 0, 0}, |
| {".f08", "#Fortran", 0, 0, 0}, {".F08", "#Fortran", 0, 0, 0}, |
| {".r", "#Ratfor", 0, 0, 0}, |
| {".go", "#Go", 0, 1, 0}, |
| {".d", "#D", 0, 1, 0}, {".dd", "#D", 0, 1, 0}, {".di", "#D", 0, 1, 0}, |
| /* Next come the entries for C. */ |
| {".c", "@c", 0, 0, 1}, |
| {"@c", |
| /* cc1 has an integrated ISO C preprocessor. We should invoke the |
| external preprocessor if -save-temps is given. */ |
| "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ |
| %{!E:%{!M:%{!MM:\ |
| %{traditional:\ |
| %eGNU C no longer supports -traditional without -E}\ |
| %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ |
| %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ |
| cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ |
| %(cc1_options)}\ |
| %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ |
| cc1 %(cpp_unique_options) %(cc1_options)}}}\ |
| %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1}, |
| {"-", |
| "%{!E:%e-E or -x required when input is from standard input}\ |
| %(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)", 0, 0, 0}, |
| {".h", "@c-header", 0, 0, 0}, |
| {"@c-header", |
| /* cc1 has an integrated ISO C preprocessor. We should invoke the |
| external preprocessor if -save-temps is given. */ |
| "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ |
| %{!E:%{!M:%{!MM:\ |
| %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ |
| %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ |
| cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ |
| %(cc1_options)\ |
| %{!fsyntax-only:%{!S:-o %g.s} \ |
| %{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}\ |
| %W{o*:--output-pch=%*}}%V}}\ |
| %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ |
| cc1 %(cpp_unique_options) %(cc1_options)\ |
| %{!fsyntax-only:%{!S:-o %g.s} \ |
| %{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}\ |
| %W{o*:--output-pch=%*}}%V}}}}}}}", 0, 0, 0}, |
| {".i", "@cpp-output", 0, 0, 0}, |
| {"@cpp-output", |
| "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0}, |
| {".s", "@assembler", 0, 0, 0}, |
| {"@assembler", |
| "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0}, |
| {".sx", "@assembler-with-cpp", 0, 0, 0}, |
| {".S", "@assembler-with-cpp", 0, 0, 0}, |
| {"@assembler-with-cpp", |
| #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT |
| "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ |
| %{E|M|MM:%(cpp_debug_options)}\ |
| %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ |
| as %(asm_debug) %(asm_options) %|.s %A }}}}" |
| #else |
| "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ |
| %{E|M|MM:%(cpp_debug_options)}\ |
| %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ |
| as %(asm_debug) %(asm_options) %m.s %A }}}}" |
| #endif |
| , 0, 0, 0}, |
| |
| #include "specs.h" |
| /* Mark end of table. */ |
| {0, 0, 0, 0, 0} |
| }; |
| |
| /* Number of elements in default_compilers, not counting the terminator. */ |
| |
| static const int n_default_compilers = ARRAY_SIZE (default_compilers) - 1; |
| |
| typedef char *char_p; /* For DEF_VEC_P. */ |
| |
| /* A vector of options to give to the linker. |
| These options are accumulated by %x, |
| and substituted into the linker command with %X. */ |
| static vec<char_p> linker_options; |
| |
| /* A vector of options to give to the assembler. |
| These options are accumulated by -Wa, |
| and substituted into the assembler command with %Y. */ |
| static vec<char_p> assembler_options; |
| |
| /* A vector of options to give to the preprocessor. |
| These options are accumulated by -Wp, |
| and substituted into the preprocessor command with %Z. */ |
| static vec<char_p> preprocessor_options; |
| |
| static char * |
| skip_whitespace (char *p) |
| { |
| while (1) |
| { |
| /* A fully-blank line is a delimiter in the SPEC file and shouldn't |
| be considered whitespace. */ |
| if (p[0] == '\n' && p[1] == '\n' && p[2] == '\n') |
| return p + 1; |
| else if (*p == '\n' || *p == ' ' || *p == '\t') |
| p++; |
| else if (*p == '#') |
| { |
| while (*p != '\n') |
| p++; |
| p++; |
| } |
| else |
| break; |
| } |
| |
| return p; |
| } |
| /* Structures to keep track of prefixes to try when looking for files. */ |
| |
| struct prefix_list |
| { |
| const char *prefix; /* String to prepend to the path. */ |
| struct prefix_list *next; /* Next in linked list. */ |
| int require_machine_suffix; /* Don't use without machine_suffix. */ |
| /* 2 means try both machine_suffix and just_machine_suffix. */ |
| int priority; /* Sort key - priority within list. */ |
| int os_multilib; /* 1 if OS multilib scheme should be used, |
| 0 for GCC multilib scheme. */ |
| }; |
| |
| struct path_prefix |
| { |
| struct prefix_list *plist; /* List of prefixes to try */ |
| int max_len; /* Max length of a prefix in PLIST */ |
| const char *name; /* Name of this list (used in config stuff) */ |
| }; |
| |
| /* List of prefixes to try when looking for executables. */ |
| |
| static struct path_prefix exec_prefixes = { 0, 0, "exec" }; |
| |
| /* List of prefixes to try when looking for startup (crt0) files. */ |
| |
| static struct path_prefix startfile_prefixes = { 0, 0, "startfile" }; |
| |
| /* List of prefixes to try when looking for include files. */ |
| |
| static struct path_prefix include_prefixes = { 0, 0, "include" }; |
| |
| /* Suffix to attach to directories searched for commands. |
| This looks like `MACHINE/VERSION/'. */ |
| |
| static const char *machine_suffix = 0; |
| |
| /* Suffix to attach to directories searched for commands. |
| This is just `MACHINE/'. */ |
| |
| static const char *just_machine_suffix = 0; |
| |
| /* Adjusted value of GCC_EXEC_PREFIX envvar. */ |
| |
| static const char *gcc_exec_prefix; |
| |
| /* Adjusted value of standard_libexec_prefix. */ |
| |
| static const char *gcc_libexec_prefix; |
| |
| /* Default prefixes to attach to command names. */ |
| |
| #ifndef STANDARD_STARTFILE_PREFIX_1 |
| #define STANDARD_STARTFILE_PREFIX_1 "/lib/" |
| #endif |
| #ifndef STANDARD_STARTFILE_PREFIX_2 |
| #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/" |
| #endif |
| |
| #ifdef CROSS_DIRECTORY_STRUCTURE /* Don't use these prefixes for a cross compiler. */ |
| #undef MD_EXEC_PREFIX |
| #undef MD_STARTFILE_PREFIX |
| #undef MD_STARTFILE_PREFIX_1 |
| #endif |
| |
| /* If no prefixes defined, use the null string, which will disable them. */ |
| #ifndef MD_EXEC_PREFIX |
| #define MD_EXEC_PREFIX "" |
| #endif |
| #ifndef MD_STARTFILE_PREFIX |
| #define MD_STARTFILE_PREFIX "" |
| #endif |
| #ifndef MD_STARTFILE_PREFIX_1 |
| #define MD_STARTFILE_PREFIX_1 "" |
| #endif |
| |
| /* These directories are locations set at configure-time based on the |
| --prefix option provided to configure. Their initializers are |
| defined in Makefile.in. These paths are not *directly* used when |
| gcc_exec_prefix is set because, in that case, we know where the |
| compiler has been installed, and use paths relative to that |
| location instead. */ |
| static const char *const standard_exec_prefix = STANDARD_EXEC_PREFIX; |
| static const char *const standard_libexec_prefix = STANDARD_LIBEXEC_PREFIX; |
| static const char *const standard_bindir_prefix = STANDARD_BINDIR_PREFIX; |
| static const char *const standard_startfile_prefix = STANDARD_STARTFILE_PREFIX; |
| |
| /* For native compilers, these are well-known paths containing |
| components that may be provided by the system. For cross |
| compilers, these paths are not used. */ |
| static const char *md_exec_prefix = MD_EXEC_PREFIX; |
| static const char *md_startfile_prefix = MD_STARTFILE_PREFIX; |
| static const char *md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1; |
| static const char *const standard_startfile_prefix_1 |
| = STANDARD_STARTFILE_PREFIX_1; |
| static const char *const standard_startfile_prefix_2 |
| = STANDARD_STARTFILE_PREFIX_2; |
| |
| /* A relative path to be used in finding the location of tools |
| relative to the driver. */ |
| static const char *const tooldir_base_prefix = TOOLDIR_BASE_PREFIX; |
| |
| /* A prefix to be used when this is an accelerator compiler. */ |
| static const char *const accel_dir_suffix = ACCEL_DIR_SUFFIX; |
| |
| /* Subdirectory to use for locating libraries. Set by |
| set_multilib_dir based on the compilation options. */ |
| |
| static const char *multilib_dir; |
| |
| /* Subdirectory to use for locating libraries in OS conventions. Set by |
| set_multilib_dir based on the compilation options. */ |
| |
| static const char *multilib_os_dir; |
| |
| /* Subdirectory to use for locating libraries in multiarch conventions. Set by |
| set_multilib_dir based on the compilation options. */ |
| |
| static const char *multiarch_dir; |
| |
| /* Structure to keep track of the specs that have been defined so far. |
| These are accessed using %(specname) in a compiler or link |
| spec. */ |
| |
| struct spec_list |
| { |
| /* The following 2 fields must be first */ |
| /* to allow EXTRA_SPECS to be initialized */ |
| const char *name; /* name of the spec. */ |
| const char *ptr; /* available ptr if no static pointer */ |
| |
| /* The following fields are not initialized */ |
| /* by EXTRA_SPECS */ |
| const char **ptr_spec; /* pointer to the spec itself. */ |
| struct spec_list *next; /* Next spec in linked list. */ |
| int name_len; /* length of the name */ |
| bool user_p; /* whether string come from file spec. */ |
| bool alloc_p; /* whether string was allocated */ |
| const char *default_ptr; /* The default value of *ptr_spec. */ |
| }; |
| |
| #define INIT_STATIC_SPEC(NAME,PTR) \ |
| { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, false, false, \ |
| *PTR } |
| |
| /* List of statically defined specs. */ |
| static struct spec_list static_specs[] = |
| { |
| INIT_STATIC_SPEC ("asm", &asm_spec), |
| INIT_STATIC_SPEC ("asm_debug", &asm_debug), |
| INIT_STATIC_SPEC ("asm_debug_option", &asm_debug_option), |
| INIT_STATIC_SPEC ("asm_final", &asm_final_spec), |
| INIT_STATIC_SPEC ("asm_options", &asm_options), |
| INIT_STATIC_SPEC ("invoke_as", &invoke_as), |
| INIT_STATIC_SPEC ("cpp", &cpp_spec), |
| INIT_STATIC_SPEC ("cpp_options", &cpp_options), |
| INIT_STATIC_SPEC ("cpp_debug_options", &cpp_debug_options), |
| INIT_STATIC_SPEC ("cpp_unique_options", &cpp_unique_options), |
| INIT_STATIC_SPEC ("trad_capable_cpp", &trad_capable_cpp), |
| INIT_STATIC_SPEC ("cc1", &cc1_spec), |
| INIT_STATIC_SPEC ("cc1_options", &cc1_options), |
| INIT_STATIC_SPEC ("cc1plus", &cc1plus_spec), |
| INIT_STATIC_SPEC ("link_gcc_c_sequence", &link_gcc_c_sequence_spec), |
| INIT_STATIC_SPEC ("link_ssp", &link_ssp_spec), |
| INIT_STATIC_SPEC ("endfile", &endfile_spec), |
| INIT_STATIC_SPEC ("link", &link_spec), |
| INIT_STATIC_SPEC ("lib", &lib_spec), |
| INIT_STATIC_SPEC ("link_gomp", &link_gomp_spec), |
| INIT_STATIC_SPEC ("libgcc", &libgcc_spec), |
| INIT_STATIC_SPEC ("startfile", &startfile_spec), |
| INIT_STATIC_SPEC ("cross_compile", &cross_compile), |
| INIT_STATIC_SPEC ("version", &compiler_version), |
| INIT_STATIC_SPEC ("multilib", &multilib_select), |
| INIT_STATIC_SPEC ("multilib_defaults", &multilib_defaults), |
| INIT_STATIC_SPEC ("multilib_extra", &multilib_extra), |
| INIT_STATIC_SPEC ("multilib_matches", &multilib_matches), |
| INIT_STATIC_SPEC ("multilib_exclusions", &multilib_exclusions), |
| INIT_STATIC_SPEC ("multilib_options", &multilib_options), |
| INIT_STATIC_SPEC ("multilib_reuse", &multilib_reuse), |
| INIT_STATIC_SPEC ("linker", &linker_name_spec), |
| INIT_STATIC_SPEC ("linker_plugin_file", &linker_plugin_file_spec), |
| INIT_STATIC_SPEC ("lto_wrapper", <o_wrapper_spec), |
| INIT_STATIC_SPEC ("lto_gcc", <o_gcc_spec), |
| INIT_STATIC_SPEC ("post_link", &post_link_spec), |
| INIT_STATIC_SPEC ("link_libgcc", &link_libgcc_spec), |
| INIT_STATIC_SPEC ("md_exec_prefix", &md_exec_prefix), |
| INIT_STATIC_SPEC ("md_startfile_prefix", &md_startfile_prefix), |
| INIT_STATIC_SPEC ("md_startfile_prefix_1", &md_startfile_prefix_1), |
| INIT_STATIC_SPEC ("startfile_prefix_spec", &startfile_prefix_spec), |
| INIT_STATIC_SPEC ("sysroot_spec", &sysroot_spec), |
| INIT_STATIC_SPEC ("sysroot_suffix_spec", &sysroot_suffix_spec), |
| INIT_STATIC_SPEC ("sysroot_hdrs_suffix_spec", &sysroot_hdrs_suffix_spec), |
| INIT_STATIC_SPEC ("self_spec", &self_spec), |
| }; |
| |
| #ifdef EXTRA_SPECS /* additional specs needed */ |
| /* Structure to keep track of just the first two args of a spec_list. |
| That is all that the EXTRA_SPECS macro gives us. */ |
| struct spec_list_1 |
| { |
| const char *const name; |
| const char *const ptr; |
| }; |
| |
| static const struct spec_list_1 extra_specs_1[] = { EXTRA_SPECS }; |
| static struct spec_list *extra_specs = (struct spec_list *) 0; |
| #endif |
| |
| /* List of dynamically allocates specs that have been defined so far. */ |
| |
| static struct spec_list *specs = (struct spec_list *) 0; |
| |
| /* List of static spec functions. */ |
| |
| static const struct spec_function static_spec_functions[] = |
| { |
| { "getenv", getenv_spec_function }, |
| { "if-exists", if_exists_spec_function }, |
| { "if-exists-else", if_exists_else_spec_function }, |
| { "if-exists-then-else", if_exists_then_else_spec_function }, |
| { "sanitize", sanitize_spec_function }, |
| { "replace-outfile", replace_outfile_spec_function }, |
| { "remove-outfile", remove_outfile_spec_function }, |
| { "version-compare", version_compare_spec_function }, |
| { "include", include_spec_function }, |
| { "find-file", find_file_spec_function }, |
| { "find-plugindir", find_plugindir_spec_function }, |
| { "print-asm-header", print_asm_header_spec_function }, |
| { "compare-debug-dump-opt", compare_debug_dump_opt_spec_function }, |
| { "compare-debug-self-opt", compare_debug_self_opt_spec_function }, |
| { "pass-through-libs", pass_through_libs_spec_func }, |
| { "dumps", dumps_spec_func }, |
| { "gt", greater_than_spec_func }, |
| { "debug-level-gt", debug_level_greater_than_spec_func }, |
| { "dwarf-version-gt", dwarf_version_greater_than_spec_func }, |
| { "fortran-preinclude-file", find_fortran_preinclude_file}, |
| #ifdef EXTRA_SPEC_FUNCTIONS |
| EXTRA_SPEC_FUNCTIONS |
| #endif |
| { 0, 0 } |
| }; |
| |
| static int processing_spec_function; |
| |
| /* Add appropriate libgcc specs to OBSTACK, taking into account |
| various permutations of -shared-libgcc, -shared, and such. */ |
| |
| #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) |
| |
| #ifndef USE_LD_AS_NEEDED |
| #define USE_LD_AS_NEEDED 0 |
| #endif |
| |
| static void |
| init_gcc_specs (struct obstack *obstack, const char *shared_name, |
| const char *static_name, const char *eh_name) |
| { |
| char *buf; |
| |
| #if USE_LD_AS_NEEDED |
| buf = concat ("%{static|static-libgcc|static-pie:", static_name, " ", eh_name, "}" |
| "%{!static:%{!static-libgcc:%{!static-pie:" |
| "%{!shared-libgcc:", |
| static_name, " " LD_AS_NEEDED_OPTION " ", |
| shared_name, " " LD_NO_AS_NEEDED_OPTION |
| "}" |
| "%{shared-libgcc:", |
| shared_name, "%{!shared: ", static_name, "}" |
| "}}" |
| #else |
| buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}" |
| "%{!static:%{!static-libgcc:" |
| "%{!shared:" |
| "%{!shared-libgcc:", static_name, " ", eh_name, "}" |
| "%{shared-libgcc:", shared_name, " ", static_name, "}" |
| "}" |
| #ifdef LINK_EH_SPEC |
| "%{shared:" |
| "%{shared-libgcc:", shared_name, "}" |
| "%{!shared-libgcc:", static_name, "}" |
| "}" |
| #else |
| "%{shared:", shared_name, "}" |
| #endif |
| #endif |
| "}}", NULL); |
| |
| obstack_grow (obstack, buf, strlen (buf)); |
| free (buf); |
| } |
| #endif /* ENABLE_SHARED_LIBGCC */ |
| |
| /* Initialize the specs lookup routines. */ |
| |
| static void |
| init_spec (void) |
| { |
| struct spec_list *next = (struct spec_list *) 0; |
| struct spec_list *sl = (struct spec_list *) 0; |
| int i; |
| |
| if (specs) |
| return; /* Already initialized. */ |
| |
| if (verbose_flag) |
| fnotice (stderr, "Using built-in specs.\n"); |
| |
| #ifdef EXTRA_SPECS |
| extra_specs = XCNEWVEC (struct spec_list, ARRAY_SIZE (extra_specs_1)); |
| |
| for (i = ARRAY_SIZE (extra_specs_1) - 1; i >= 0; i--) |
| { |
| sl = &extra_specs[i]; |
| sl->name = extra_specs_1[i].name; |
| sl->ptr = extra_specs_1[i].ptr; |
| sl->next = next; |
| sl->name_len = strlen (sl->name); |
| sl->ptr_spec = &sl->ptr; |
| gcc_assert (sl->ptr_spec != NULL); |
| sl->default_ptr = sl->ptr; |
| next = sl; |
| } |
| #endif |
| |
| for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) |
| { |
| sl = &static_specs[i]; |
| sl->next = next; |
| next = sl; |
| } |
| |
| #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) |
| /* ??? If neither -shared-libgcc nor --static-libgcc was |
| seen, then we should be making an educated guess. Some proposed |
| heuristics for ELF include: |
| |
| (1) If "-Wl,--export-dynamic", then it's a fair bet that the |
| program will be doing dynamic loading, which will likely |
| need the shared libgcc. |
| |
| (2) If "-ldl", then it's also a fair bet that we're doing |
| dynamic loading. |
| |
| (3) For each ET_DYN we're linking against (either through -lfoo |
| or /some/path/foo.so), check to see whether it or one of |
| its dependencies depends on a shared libgcc. |
| |
| (4) If "-shared" |
| |
| If the runtime is fixed to look for program headers instead |
| of calling __register_frame_info at all, for each object, |
| use the shared libgcc if any EH symbol referenced. |
| |
| If crtstuff is fixed to not invoke __register_frame_info |
| automatically, for each object, use the shared libgcc if |
| any non-empty unwind section found. |
| |
| Doing any of this probably requires invoking an external program to |
| do the actual object file scanning. */ |
| { |
| const char *p = libgcc_spec; |
| int in_sep = 1; |
| |
| /* Transform the extant libgcc_spec into one that uses the shared libgcc |
| when given the proper command line arguments. */ |
| while (*p) |
| { |
| if (in_sep && *p == '-' && startswith (p, "-lgcc")) |
| { |
| init_gcc_specs (&obstack, |
| "-lgcc_s" |
| #ifdef USE_LIBUNWIND_EXCEPTIONS |
| " -lunwind" |
| #endif |
| , |
| "-lgcc", |
| "-lgcc_eh" |
| #ifdef USE_LIBUNWIND_EXCEPTIONS |
| # ifdef HAVE_LD_STATIC_DYNAMIC |
| " %{!static:%{!static-pie:" LD_STATIC_OPTION "}} -lunwind" |
| " %{!static:%{!static-pie:" LD_DYNAMIC_OPTION "}}" |
| # else |
| " -lunwind" |
| # endif |
| #endif |
| ); |
| |
| p += 5; |
| in_sep = 0; |
| } |
| else if (in_sep && *p == 'l' && startswith (p, "libgcc.a%s")) |
| { |
| /* Ug. We don't know shared library extensions. Hope that |
| systems that use this form don't do shared libraries. */ |
| init_gcc_specs (&obstack, |
| "-lgcc_s", |
| "libgcc.a%s", |
| "libgcc_eh.a%s" |
| #ifdef USE_LIBUNWIND_EXCEPTIONS |
| " -lunwind" |
| #endif |
| ); |
| p += 10; |
| in_sep = 0; |
| } |
| else |
| { |
| obstack_1grow (&obstack, *p); |
| in_sep = (*p == ' '); |
| p += 1; |
| } |
| } |
| |
| obstack_1grow (&obstack, '\0'); |
| libgcc_spec = XOBFINISH (&obstack, const char *); |
| } |
| #endif |
| #ifdef USE_AS_TRADITIONAL_FORMAT |
| /* Prepend "--traditional-format" to whatever asm_spec we had before. */ |
| { |
| static const char tf[] = "--traditional-format "; |
| obstack_grow (&obstack, tf, sizeof (tf) - 1); |
| obstack_grow0 (&obstack, asm_spec, strlen (asm_spec)); |
| asm_spec = XOBFINISH (&obstack, const char *); |
| } |
| #endif |
| |
| #if defined LINK_EH_SPEC || defined LINK_BUILDID_SPEC || \ |
| defined LINKER_HASH_STYLE |
| # ifdef LINK_BUILDID_SPEC |
| /* Prepend LINK_BUILDID_SPEC to whatever link_spec we had before. */ |
| obstack_grow (&obstack, LINK_BUILDID_SPEC, sizeof (LINK_BUILDID_SPEC) - 1); |
| # endif |
| # ifdef LINK_EH_SPEC |
| /* Prepend LINK_EH_SPEC to whatever link_spec we had before. */ |
| obstack_grow (&obstack, LINK_EH_SPEC, sizeof (LINK_EH_SPEC) - 1); |
| # endif |
| # ifdef LINKER_HASH_STYLE |
| /* Prepend --hash-style=LINKER_HASH_STYLE to whatever link_spec we had |
| before. */ |
| { |
| static const char hash_style[] = "--hash-style="; |
| obstack_grow (&obstack, hash_style, sizeof (hash_style) - 1); |
| obstack_grow (&obstack, LINKER_HASH_STYLE, sizeof (LINKER_HASH_STYLE) - 1); |
| obstack_1grow (&obstack, ' '); |
| } |
| # endif |
| obstack_grow0 (&obstack, link_spec, strlen (link_spec)); |
| link_spec = XOBFINISH (&obstack, const char *); |
| #endif |
| |
| specs = sl; |
| } |
| |
| /* Update the entry for SPEC in the static_specs table to point to VALUE, |
| ensuring that we free the previous value if necessary. Set alloc_p for the |
| entry to ALLOC_P: this determines whether we take ownership of VALUE (i.e. |
| whether we need to free it later on). */ |
| static void |
| set_static_spec (const char **spec, const char *value, bool alloc_p) |
| { |
| struct spec_list *sl = NULL; |
| |
| for (unsigned i = 0; i < ARRAY_SIZE (static_specs); i++) |
| { |
| if (static_specs[i].ptr_spec == spec) |
| { |
| sl = static_specs + i; |
| break; |
| } |
| } |
| |
| gcc_assert (sl); |
| |
| if (sl->alloc_p) |
| { |
| const char *old = *spec; |
| free (const_cast <char *> (old)); |
| } |
| |
| *spec = value; |
| sl->alloc_p = alloc_p; |
| } |
| |
| /* Update a static spec to a new string, taking ownership of that |
| string's memory. */ |
| static void set_static_spec_owned (const char **spec, const char *val) |
| { |
| return set_static_spec (spec, val, true); |
| } |
| |
| /* Update a static spec to point to a new value, but don't take |
| ownership of (i.e. don't free) that string. */ |
| static void set_static_spec_shared (const char **spec, const char *val) |
| { |
| return set_static_spec (spec, val, false); |
| } |
| |
| |
| /* Change the value of spec NAME to SPEC. If SPEC is empty, then the spec is |
| removed; If the spec starts with a + then SPEC is added to the end of the |
| current spec. */ |
| |
| static void |
| set_spec (const char *name, const char *spec, bool user_p) |
| { |
| struct spec_list *sl; |
| const char *old_spec; |
| int name_len = strlen (name); |
| int i; |
| |
| /* If this is the first call, initialize the statically allocated specs. */ |
| if (!specs) |
| { |
| struct spec_list *next = (struct spec_list *) 0; |
| for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) |
| { |
| sl = &static_specs[i]; |
| sl->next = next; |
| next = sl; |
| } |
| specs = sl; |
| } |
| |
| /* See if the spec already exists. */ |
| for (sl = specs; sl; sl = sl->next) |
| if (name_len == sl->name_len && !strcmp (sl->name, name)) |
| break; |
| |
| if (!sl) |
| { |
| /* Not found - make it. */ |
| sl = XNEW (struct spec_list); |
| sl->name = xstrdup (name); |
| sl->name_len = name_len; |
| sl->ptr_spec = &sl->ptr; |
| sl->alloc_p = 0; |
| *(sl->ptr_spec) = ""; |
| sl->next = specs; |
| sl->default_ptr = NULL; |
| specs = sl; |
| } |
| |
| old_spec = *(sl->ptr_spec); |
| *(sl->ptr_spec) = ((spec[0] == '+' && ISSPACE ((unsigned char)spec[1])) |
| ? concat (old_spec, spec + 1, NULL) |
| : xstrdup (spec)); |
| |
| #ifdef DEBUG_SPECS |
| if (verbose_flag) |
| fnotice (stderr, "Setting spec %s to '%s'\n\n", name, *(sl->ptr_spec)); |
| #endif |
| |
| /* Free the old spec. */ |
| if (old_spec && sl->alloc_p) |
| free (CONST_CAST (char *, old_spec)); |
| |
| sl->user_p = user_p; |
| sl->alloc_p = true; |
| } |
| |
| /* Accumulate a command (program name and args), and run it. */ |
| |
| typedef const char *const_char_p; /* For DEF_VEC_P. */ |
| |
| /* Vector of pointers to arguments in the current line of specifications. */ |
| static vec<const_char_p> argbuf; |
| |
| /* Likewise, but for the current @file. */ |
| static vec<const_char_p> at_file_argbuf; |
| |
| /* Whether an @file is currently open. */ |
| static bool in_at_file = false; |
| |
| /* Were the options -c, -S or -E passed. */ |
| static int have_c = 0; |
| |
| /* Was the option -o passed. */ |
| static int have_o = 0; |
| |
| /* Was the option -E passed. */ |
| static int have_E = 0; |
| |
| /* Pointer to output file name passed in with -o. */ |
| static const char *output_file = 0; |
| |
| /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated |
| temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for |
| it here. */ |
| |
| static struct temp_name { |
| const char *suffix; /* suffix associated with the code. */ |
| int length; /* strlen (suffix). */ |
| int unique; /* Indicates whether %g or %u/%U was used. */ |
| const char *filename; /* associated filename. */ |
| int filename_length; /* strlen (filename). */ |
| struct temp_name *next; |
| } *temp_names; |
| |
| /* Number of commands executed so far. */ |
| |
| static int execution_count; |
| |
| /* Number of commands that exited with a signal. */ |
| |
| static int signal_count; |
| |
| /* Allocate the argument vector. */ |
| |
| static void |
| alloc_args (void) |
| { |
| argbuf.create (10); |
| at_file_argbuf.create (10); |
| } |
| |
| /* Clear out the vector of arguments (after a command is executed). */ |
| |
| static void |
| clear_args (void) |
| { |
| argbuf.truncate (0); |
| at_file_argbuf.truncate (0); |
| } |
| |
| /* Add one argument to the vector at the end. |
| This is done when a space is seen or at the end of the line. |
| If DELETE_ALWAYS is nonzero, the arg is a filename |
| and the file should be deleted eventually. |
| If DELETE_FAILURE is nonzero, the arg is a filename |
| and the file should be deleted if this compilation fails. */ |
| |
| static void |
| store_arg (const char *arg, int delete_always, int delete_failure) |
| { |
| if (in_at_file) |
| at_file_argbuf.safe_push (arg); |
| else |
| argbuf.safe_push (arg); |
| |
| if (delete_always || delete_failure) |
| { |
| const char *p; |
| /* If the temporary file we should delete is specified as |
| part of a joined argument extract the filename. */ |
| if (arg[0] == '-' |
| && (p = strrchr (arg, '='))) |
| arg = p + 1; |
| record_temp_file (arg, delete_always, delete_failure); |
| } |
| } |
| |
| /* Open a temporary @file into which subsequent arguments will be stored. */ |
| |
| static void |
| open_at_file (void) |
| { |
| if (in_at_file) |
| fatal_error (input_location, "cannot open nested response file"); |
| else |
| in_at_file = true; |
| } |
| |
| /* Create a temporary @file name. */ |
| |
| static char *make_at_file (void) |
| { |
| static int fileno = 0; |
| char filename[20]; |
| const char *base, *ext; |
| |
| if (!save_temps_flag) |
| return make_temp_file (""); |
| |
| base = dumpbase; |
| if (!(base && *base)) |
| base = dumpdir; |
| if (!(base && *base)) |
| base = "a"; |
| |
| sprintf (filename, ".args.%d", fileno++); |
| ext = filename; |
| |
| if (base == dumpdir && dumpdir_trailing_dash_added) |
| ext++; |
| |
| return concat (base, ext, NULL); |
| } |
| |
| /* Close the temporary @file and add @file to the argument list. */ |
| |
| static void |
| close_at_file (void) |
| { |
| if (!in_at_file) |
| fatal_error (input_location, "cannot close nonexistent response file"); |
| |
| in_at_file = false; |
| |
| const unsigned int n_args = at_file_argbuf.length (); |
| if (n_args == 0) |
| return; |
| |
| char **argv = XALLOCAVEC (char *, n_args + 1); |
| char *temp_file = make_at_file (); |
| char *at_argument = concat ("@", temp_file, NULL); |
| FILE *f = fopen (temp_file, "w"); |
| int status; |
| unsigned int i; |
| |
| /* Copy the strings over. */ |
| for (i = 0; i < n_args; i++) |
| argv[i] = CONST_CAST (char *, at_file_argbuf[i]); |
| argv[i] = NULL; |
| |
| at_file_argbuf.truncate (0); |
| |
| if (f == NULL) |
| fatal_error (input_location, "could not open temporary response file %s", |
| temp_file); |
| |
| status = writeargv (argv, f); |
| |
| if (status) |
| fatal_error (input_location, |
| "could not write to temporary response file %s", |
| temp_file); |
| |
| status = fclose (f); |
| |
| if (status == EOF) |
| fatal_error (input_location, "could not close temporary response file %s", |
| temp_file); |
| |
| store_arg (at_argument, 0, 0); |
| |
| record_temp_file (temp_file, !save_temps_flag, !save_temps_flag); |
| } |
| |
| /* Load specs from a file name named FILENAME, replacing occurrences of |
| various different types of line-endings, \r\n, \n\r and just \r, with |
| a single \n. */ |
| |
| static char * |
| load_specs (const char *filename) |
| { |
| int desc; |
| int readlen; |
| struct stat statbuf; |
| char *buffer; |
| char *buffer_p; |
| char *specs; |
| char *specs_p; |
| |
| if (verbose_flag) |
| fnotice (stderr, "Reading specs from %s\n", filename); |
| |
| /* Open and stat the file. */ |
| desc = open (filename, O_RDONLY, 0); |
| if (desc < 0) |
| { |
| failed: |
| /* This leaves DESC open, but the OS will save us. */ |
| fatal_error (input_location, "cannot read spec file %qs: %m", filename); |
| } |
| |
| if (stat (filename, &statbuf) < 0) |
| goto failed; |
| |
| /* Read contents of file into BUFFER. */ |
| buffer = XNEWVEC (char, statbuf.st_size + 1); |
| readlen = read (desc, buffer, (unsigned) statbuf.st_size); |
| if (readlen < 0) |
| goto failed; |
| buffer[readlen] = 0; |
| close (desc); |
| |
| specs = XNEWVEC (char, readlen + 1); |
| specs_p = specs; |
| for (buffer_p = buffer; buffer_p && *buffer_p; buffer_p++) |
| { |
| int skip = 0; |
| char c = *buffer_p; |
| if (c == '\r') |
| { |
| if (buffer_p > buffer && *(buffer_p - 1) == '\n') /* \n\r */ |
| skip = 1; |
| else if (*(buffer_p + 1) == '\n') /* \r\n */ |
| skip = 1; |
| else /* \r */ |
| c = '\n'; |
| } |
| if (! skip) |
| *specs_p++ = c; |
| } |
| *specs_p = '\0'; |
| |
| free (buffer); |
| return (specs); |
| } |
| |
| /* Read compilation specs from a file named FILENAME, |
| replacing the default ones. |
| |
| A suffix which starts with `*' is a definition for |
| one of the machine-specific sub-specs. The "suffix" should be |
| *asm, *cc1, *cpp, *link, *startfile, etc. |
| The corresponding spec is stored in asm_spec, etc., |
| rather than in the `compilers' vector. |
| |
| Anything invalid in the file is a fatal error. */ |
| |
| static void |
| read_specs (const char *filename, bool main_p, bool user_p) |
| { |
| char *buffer; |
| char *p; |
| |
| buffer = load_specs (filename); |
| |
| /* Scan BUFFER for specs, putting them in the vector. */ |
| p = buffer; |
| while (1) |
| { |
| char *suffix; |
| char *spec; |
| char *in, *out, *p1, *p2, *p3; |
| |
| /* Advance P in BUFFER to the next nonblank nocomment line. */ |
| p = skip_whitespace (p); |
| if (*p == 0) |
| break; |
| |
| /* Is this a special command that starts with '%'? */ |
| /* Don't allow this for the main specs file, since it would |
| encourage people to overwrite it. */ |
| if (*p == '%' && !main_p) |
| { |
| p1 = p; |
| while (*p && *p != '\n') |
| p++; |
| |
| /* Skip '\n'. */ |
| p++; |
| |
| if (startswith (p1, "%include") |
| && (p1[sizeof "%include" - 1] == ' ' |
| || p1[sizeof "%include" - 1] == '\t')) |
| { |
| char *new_filename; |
| |
| p1 += sizeof ("%include"); |
| while (*p1 == ' ' || *p1 == '\t') |
| p1++; |
| |
| if (*p1++ != '<' || p[-2] != '>') |
| fatal_error (input_location, |
| "specs %%include syntax malformed after " |
| "%ld characters", |
| (long) (p1 - buffer + 1)); |
| |
| p[-2] = '\0'; |
| new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); |
| read_specs (new_filename ? new_filename : p1, false, user_p); |
| continue; |
| } |
| else if (startswith (p1, "%include_noerr") |
| && (p1[sizeof "%include_noerr" - 1] == ' ' |
| || p1[sizeof "%include_noerr" - 1] == '\t')) |
| { |
| char *new_filename; |
| |
| p1 += sizeof "%include_noerr"; |
| while (*p1 == ' ' || *p1 == '\t') |
| p1++; |
| |
| if (*p1++ != '<' || p[-2] != '>') |
| fatal_error (input_location, |
| "specs %%include syntax malformed after " |
| "%ld characters", |
| (long) (p1 - buffer + 1)); |
| |
| p[-2] = '\0'; |
| new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); |
| if (new_filename) |
| read_specs (new_filename, false, user_p); |
| else if (verbose_flag) |
| fnotice (stderr, "could not find specs file %s\n", p1); |
| continue; |
| } |
| else if (startswith (p1, "%rename") |
| && (p1[sizeof "%rename" - 1] == ' ' |
| || p1[sizeof "%rename" - 1] == '\t')) |
| { |
| int name_len; |
| struct spec_list *sl; |
| struct spec_list *newsl; |
| |
| /* Get original name. */ |
| p1 += sizeof "%rename"; |
| while (*p1 == ' ' || *p1 == '\t') |
| p1++; |
| |
| if (! ISALPHA ((unsigned char) *p1)) |
| fatal_error (input_location, |
| "specs %%rename syntax malformed after " |
| "%ld characters", |
| (long) (p1 - buffer)); |
| |
| p2 = p1; |
| while (*p2 && !ISSPACE ((unsigned char) *p2)) |
| p2++; |
| |
| if (*p2 != ' ' && *p2 != '\t') |
| fatal_error (input_location, |
| "specs %%rename syntax malformed after " |
| "%ld characters", |
| (long) (p2 - buffer)); |
| |
| name_len = p2 - p1; |
| *p2++ = '\0'; |
| while (*p2 == ' ' || *p2 == '\t') |
| p2++; |
| |
| if (! ISALPHA ((unsigned char) *p2)) |
| fatal_error (input_location, |
| "specs %%rename syntax malformed after " |
| "%ld characters", |
| (long) (p2 - buffer)); |
| |
| /* Get new spec name. */ |
| p3 = p2; |
| while (*p3 && !ISSPACE ((unsigned char) *p3)) |
| p3++; |
| |
| if (p3 != p - 1) |
| fatal_error (input_location, |
| "specs %%rename syntax malformed after " |
| "%ld characters", |
| (long) (p3 - buffer)); |
| *p3 = '\0'; |
| |
| for (sl = specs; sl; sl = sl->next) |
| if (name_len == sl->name_len && !strcmp (sl->name, p1)) |
| break; |
| |
| if (!sl) |
| fatal_error (input_location, |
| "specs %s spec was not found to be renamed", p1); |
| |
| if (strcmp (p1, p2) == 0) |
| continue; |
| |
| for (newsl = specs; newsl; newsl = newsl->next) |
| if (strcmp (newsl->name, p2) == 0) |
| fatal_error (input_location, |
| "%s: attempt to rename spec %qs to " |
| "already defined spec %qs", |
| filename, p1, p2); |
| |
| if (verbose_flag) |
| { |
| fnotice (stderr, "rename spec %s to %s\n", p1, p2); |
| #ifdef DEBUG_SPECS |
| fnotice (stderr, "spec is '%s'\n\n", *(sl->ptr_spec)); |
| #endif |
| } |
| |
| set_spec (p2, *(sl->ptr_spec), user_p); |
| if (sl->alloc_p) |
| free (CONST_CAST (char *, *(sl->ptr_spec))); |
| |
| *(sl->ptr_spec) = ""; |
| sl->alloc_p = 0; |
| continue; |
| } |
| else |
| fatal_error (input_location, |
| "specs unknown %% command after %ld characters", |
| (long) (p1 - buffer)); |
| } |
| |
| /* Find the colon that should end the suffix. */ |
| p1 = p; |
| while (*p1 && *p1 != ':' && *p1 != '\n') |
| p1++; |
| |
| /* The colon shouldn't be missing. */ |
| if (*p1 != ':') |
| fatal_error (input_location, |
| "specs file malformed after %ld characters", |
| (long) (p1 - buffer)); |
| |
| /* Skip back over trailing whitespace. */ |
| p2 = p1; |
| while (p2 > buffer && (p2[-1] == ' ' || p2[-1] == '\t')) |
| p2--; |
| |
| /* Copy the suffix to a string. */ |
| suffix = save_string (p, p2 - p); |
| /* Find the next line. */ |
| p = skip_whitespace (p1 + 1); |
| if (p[1] == 0) |
| fatal_error (input_location, |
| "specs file malformed after %ld characters", |
| (long) (p - buffer)); |
| |
| p1 = p; |
| /* Find next blank line or end of string. */ |
| while (*p1 && !(*p1 == '\n' && (p1[1] == '\n' || p1[1] == '\0'))) |
| p1++; |
| |
| /* Specs end at the blank line and do not include the newline. */ |
| spec = save_string (p, p1 - p); |
| p = p1; |
| |
| /* Delete backslash-newline sequences from the spec. */ |
| in = spec; |
| out = spec; |
| while (*in != 0) |
| { |
| if (in[0] == '\\' && in[1] == '\n') |
| in += 2; |
| else if (in[0] == '#') |
| while (*in && *in != '\n') |
| in++; |
| |
| else |
| *out++ = *in++; |
| } |
| *out = 0; |
| |
| if (suffix[0] == '*') |
| { |
| if (! strcmp (suffix, "*link_command")) |
| link_command_spec = spec; |
| else |
| { |
| set_spec (suffix + 1, spec, user_p); |
| free (spec); |
| } |
| } |
| else |
| { |
| /* Add this pair to the vector. */ |
| compilers |
| = XRESIZEVEC (struct compiler, compilers, n_compilers + 2); |
| |
| compilers[n_compilers].suffix = suffix; |
| compilers[n_compilers].spec = spec; |
| n_compilers++; |
| memset (&compilers[n_compilers], 0, sizeof compilers[n_compilers]); |
| } |
| |
| if (*suffix == 0) |
| link_command_spec = spec; |
| } |
| |
| if (link_command_spec == 0) |
| fatal_error (input_location, "spec file has no spec for linking"); |
| |
| XDELETEVEC (buffer); |
| } |
| |
| /* Record the names of temporary files we tell compilers to write, |
| and delete them at the end of the run. */ |
| |
| /* This is the common prefix we use to make temp file names. |
| It is chosen once for each run of this program. |
| It is substituted into a spec by %g or %j. |
| Thus, all temp file names contain this prefix. |
| In practice, all temp file names start with this prefix. |
| |
| This prefix comes from the envvar TMPDIR if it is defined; |
| otherwise, from the P_tmpdir macro if that is defined; |
| otherwise, in /usr/tmp or /tmp; |
| or finally the current directory if all else fails. */ |
| |
| static const char *temp_filename; |
| |
| /* Length of the prefix. */ |
| |
| static int temp_filename_length; |
| |
| /* Define the list of temporary files to delete. */ |
| |
| struct temp_file |
| { |
| const char *name; |
| struct temp_file *next; |
| }; |
| |
| /* Queue of files to delete on success or failure of compilation. */ |
| static struct temp_file *always_delete_queue; |
| /* Queue of files to delete on failure of compilation. */ |
| static struct temp_file *failure_delete_queue; |
| |
| /* Record FILENAME as a file to be deleted automatically. |
| ALWAYS_DELETE nonzero means delete it if all compilation succeeds; |
| otherwise delete it in any case. |
| FAIL_DELETE nonzero means delete it if a compilation step fails; |
| otherwise delete it in any case. */ |
| |
| void |
| record_temp_file (const char *filename, int always_delete, int fail_delete) |
| { |
| char *const name = xstrdup (filename); |
| |
| if (always_delete) |
| { |
| struct temp_file *temp; |
| for (temp = always_delete_queue; temp; temp = temp->next) |
| if (! filename_cmp (name, temp->name)) |
| { |
| free (name); |
| goto already1; |
| } |
| |
| temp = XNEW (struct temp_file); |
| temp->next = always_delete_queue; |
| temp->name = name; |
| always_delete_queue = temp; |
| |
| already1:; |
| } |
| |
| if (fail_delete) |
| { |
| struct temp_file *temp; |
| for (temp = failure_delete_queue; temp; temp = temp->next) |
| if (! filename_cmp (name, temp->name)) |
| { |
| free (name); |
| goto already2; |
| } |
| |
| temp = XNEW (struct temp_file); |
| temp->next = failure_delete_queue; |
| temp->name = name; |
| failure_delete_queue = temp; |
| |
| already2:; |
| } |
| } |
| |
| /* Delete all the temporary files whose names we previously recorded. */ |
| |
| #ifndef DELETE_IF_ORDINARY |
| #define DELETE_IF_ORDINARY(NAME,ST,VERBOSE_FLAG) \ |
| do \ |
| { \ |
| if (stat (NAME, &ST) >= 0 && S_ISREG (ST.st_mode)) \ |
| if (unlink (NAME) < 0) \ |
| if (VERBOSE_FLAG) \ |
| error ("%s: %m", (NAME)); \ |
| } while (0) |
| #endif |
| |
| static void |
| delete_if_ordinary (const char *name) |
| { |
| struct stat st; |
| #ifdef DEBUG |
| int i, c; |
| |
| printf ("Delete %s? (y or n) ", name); |
| fflush (stdout); |
| i = getchar (); |
| if (i != '\n') |
| while ((c = getchar ()) != '\n' && c != EOF) |
| ; |
| |
| if (i == 'y' || i == 'Y') |
| #endif /* DEBUG */ |
| DELETE_IF_ORDINARY (name, st, verbose_flag); |
| } |
| |
| static void |
| delete_temp_files (void) |
| { |
| struct temp_file *temp; |
| |
| for (temp = always_delete_queue; temp; temp = temp->next) |
| delete_if_ordinary (temp->name); |
| always_delete_queue = 0; |
| } |
| |
| /* Delete all the files to be deleted on error. */ |
| |
| static void |
| delete_failure_queue (void) |
| { |
| struct temp_file *temp; |
| |
| for (temp = failure_delete_queue; temp; temp = temp->next) |
| delete_if_ordinary (temp->name); |
| } |
| |
| static void |
| clear_failure_queue (void) |
| { |
| failure_delete_queue = 0; |
| } |
| |
| /* Call CALLBACK for each path in PATHS, breaking out early if CALLBACK |
| returns non-NULL. |
| If DO_MULTI is true iterate over the paths twice, first with multilib |
| suffix then without, otherwise iterate over the paths once without |
| adding a multilib suffix. When DO_MULTI is true, some attempt is made |
| to avoid visiting the same path twice, but we could do better. For |
| instance, /usr/lib/../lib is considered different from /usr/lib. |
| At least EXTRA_SPACE chars past the end of the path passed to |
| CALLBACK are available for use by the callback. |
| CALLBACK_INFO allows extra parameters to be passed to CALLBACK. |
| |
| Returns the value returned by CALLBACK. */ |
| |
| static void * |
| for_each_path (const struct path_prefix *paths, |
| bool do_multi, |
| size_t extra_space, |
| void *(*callback) (char *, void *), |
| void *callback_info) |
| { |
| struct prefix_list *pl; |
| const char *multi_dir = NULL; |
| const char *multi_os_dir = NULL; |
| const char *multiarch_suffix = NULL; |
| const char *multi_suffix; |
| const char *just_multi_suffix; |
| char *path = NULL; |
| void *ret = NULL; |
| bool skip_multi_dir = false; |
| bool skip_multi_os_dir = false; |
| |
| multi_suffix = machine_suffix; |
| just_multi_suffix = just_machine_suffix; |
| if (do_multi && multilib_dir && strcmp (multilib_dir, ".") != 0) |
| { |
| multi_dir = concat (multilib_dir, dir_separator_str, NULL); |
| multi_suffix = concat (multi_suffix, multi_dir, NULL); |
| just_multi_suffix = concat (just_multi_suffix, multi_dir, NULL); |
| } |
| if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0) |
| multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL); |
| if (multiarch_dir) |
| multiarch_suffix = concat (multiarch_dir, dir_separator_str, NULL); |
| |
| while (1) |
| { |
| size_t multi_dir_len = 0; |
| size_t multi_os_dir_len = 0; |
| size_t multiarch_len = 0; |
| size_t suffix_len; |
| size_t just_suffix_len; |
| size_t len; |
| |
| if (multi_dir) |
| multi_dir_len = strlen (multi_dir); |
| if (multi_os_dir) |
| multi_os_dir_len = strlen (multi_os_dir); |
| if (multiarch_suffix) |
| multiarch_len = strlen (multiarch_suffix); |
| suffix_len = strlen (multi_suffix); |
| just_suffix_len = strlen (just_multi_suffix); |
| |
| if (path == NULL) |
| { |
| len = paths->max_len + extra_space + 1; |
| len += MAX (MAX (suffix_len, multi_os_dir_len), multiarch_len); |
| path = XNEWVEC (char, len); |
| } |
| |
| for (pl = paths->plist; pl != 0; pl = pl->next) |
| { |
| len = strlen (pl->prefix); |
| memcpy (path, pl->prefix, len); |
| |
| /* Look first in MACHINE/VERSION subdirectory. */ |
| if (!skip_multi_dir) |
| { |
| memcpy (path + len, multi_suffix, suffix_len + 1); |
| ret = callback (path, callback_info); |
| if (ret) |
| break; |
| } |
| |
| /* Some paths are tried with just the machine (ie. target) |
| subdir. This is used for finding as, ld, etc. */ |
| if (!skip_multi_dir |
| && pl->require_machine_suffix == 2) |
| { |
| memcpy (path + len, just_multi_suffix, just_suffix_len + 1); |
| ret = callback (path, callback_info); |
| if (ret) |
| break; |
| } |
| |
| /* Now try the multiarch path. */ |
| if (!skip_multi_dir |
| && !pl->require_machine_suffix && multiarch_dir) |
| { |
| memcpy (path + len, multiarch_suffix, multiarch_len + 1); |
| ret = callback (path, callback_info); |
| if (ret) |
| break; |
| } |
| |
| /* Now try the base path. */ |
| if (!pl->require_machine_suffix |
| && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir)) |
| { |
| const char *this_multi; |
| size_t this_multi_len; |
| |
| if (pl->os_multilib) |
| { |
| this_multi = multi_os_dir; |
| this_multi_len = multi_os_dir_len; |
| } |
| else |
| { |
| this_multi = multi_dir; |
| this_multi_len = multi_dir_len; |
| } |
| |
| if (this_multi_len) |
| memcpy (path + len, this_multi, this_multi_len + 1); |
| else |
| path[len] = '\0'; |
| |
| ret = callback (path, callback_info); |
| if (ret) |
| break; |
| } |
| } |
| if (pl) |
| break; |
| |
| if (multi_dir == NULL && multi_os_dir == NULL) |
| break; |
| |
| /* Run through the paths again, this time without multilibs. |
| Don't repeat any we have already seen. */ |
| if (multi_dir) |
| { |
| free (CONST_CAST (char *, multi_dir)); |
| multi_dir = NULL; |
| free (CONST_CAST (char *, multi_suffix)); |
| multi_suffix = machine_suffix; |
| free (CONST_CAST (char *, just_multi_suffix)); |
| just_multi_suffix = just_machine_suffix; |
| } |
| else |
| skip_multi_dir = true; |
| if (multi_os_dir) |
| { |
| free (CONST_CAST (char *, multi_os_dir)); |
| multi_os_dir = NULL; |
| } |
| else |
| skip_multi_os_dir = true; |
| } |
| |
| if (multi_dir) |
| { |
| free (CONST_CAST (char *, multi_dir)); |
| free (CONST_CAST (char *, multi_suffix)); |
| free (CONST_CAST (char *, just_multi_suffix)); |
| } |
| if (multi_os_dir) |
| free (CONST_CAST (char *, multi_os_dir)); |
| if (ret != path) |
| free (path); |
| return ret; |
| } |
| |
| /* Callback for build_search_list. Adds path to obstack being built. */ |
| |
| struct add_to_obstack_info { |
| struct obstack *ob; |
| bool check_dir; |
| bool first_time; |
| }; |
| |
| static void * |
| add_to_obstack (char *path, void *data) |
| { |
| struct add_to_obstack_info *info = (struct add_to_obstack_info *) data; |
| |
| if (info->check_dir && !is_directory (path, false)) |
| return NULL; |
| |
| if (!info->first_time) |
| obstack_1grow (info->ob, PATH_SEPARATOR); |
| |
| obstack_grow (info->ob, path, strlen (path)); |
| |
| info->first_time = false; |
| return NULL; |
| } |
| |
| /* Add or change the value of an environment variable, outputting the |
| change to standard error if in verbose mode. */ |
| static void |
| xputenv (const char *string) |
| { |
| env.xput (string); |
| } |
| |
| /* Build a list of search directories from PATHS. |
| PREFIX is a string to prepend to the list. |
| If CHECK_DIR_P is true we ensure the directory exists. |
| If DO_MULTI is true, multilib paths are output first, then |
| non-multilib paths. |
| This is used mostly by putenv_from_prefixes so we use `collect_obstack'. |
| It is also used by the --print-search-dirs flag. */ |
| |
| static char * |
| build_search_list (const struct path_prefix *paths, const char *prefix, |
| bool check_dir, bool do_multi) |
| { |
| struct add_to_obstack_info info; |
| |
| info.ob = &collect_obstack; |
| info.check_dir = check_dir; |
| info.first_time = true; |
| |
| obstack_grow (&collect_obstack, prefix, strlen (prefix)); |
| obstack_1grow (&collect_obstack, '='); |
| |
| for_each_path (paths, do_multi, 0, add_to_obstack, &info); |
| |
| obstack_1grow (&collect_obstack, '\0'); |
| return XOBFINISH (&collect_obstack, char *); |
| } |
| |
| /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables |
| for collect. */ |
| |
| static void |
| putenv_from_prefixes (const struct path_prefix *paths, const char *env_var, |
| bool do_multi) |
| { |
| xputenv (build_search_list (paths, env_var, true, do_multi)); |
| } |
| |
| /* Check whether NAME can be accessed in MODE. This is like access, |
| except that it never considers directories to be executable. */ |
| |
| static int |
| access_check (const char *name, int mode) |
| { |
| if (mode == X_OK) |
| { |
| struct stat st; |
| |
| if (stat (name, &st) < 0 |
| || S_ISDIR (st.st_mode)) |
| return -1; |
| } |
| |
| return access (name, mode); |
| } |
| |
| /* Callback for find_a_file. Appends the file name to the directory |
| path. If the resulting file exists in the right mode, return the |
| full pathname to the file. */ |
| |
| struct file_at_path_info { |
| const char *name; |
| const char *suffix; |
| int name_len; |
| int suffix_len; |
| int mode; |
| }; |
| |
| static void * |
| file_at_path (char *path, void *data) |
| { |
| struct file_at_path_info *info = (struct file_at_path_info *) data; |
| size_t len = strlen (path); |
| |
| memcpy (path + len, info->name, info->name_len); |
| len += info->name_len; |
| |
| /* Some systems have a suffix for executable files. |
| So try appending that first. */ |
| if (info->suffix_len) |
| { |
| memcpy (path + len, info->suffix, info->suffix_len + 1); |
| if (access_check (path, info->mode) == 0) |
| return path; |
| } |
| |
| path[len] = '\0'; |
| if (access_check (path, info->mode) == 0) |
| return path; |
| |
| return NULL; |
| } |
| |
| /* Search for NAME using the prefix list PREFIXES. MODE is passed to |
| access to check permissions. If DO_MULTI is true, search multilib |
| paths then non-multilib paths, otherwise do not search multilib paths. |
| Return 0 if not found, otherwise return its name, allocated with malloc. */ |
| |
| static char * |
| find_a_file (const struct path_prefix *pprefix, const char *name, int mode, |
| bool do_multi) |
| { |
| struct file_at_path_info info; |
| |
| /* Find the filename in question (special case for absolute paths). */ |
| |
| if (IS_ABSOLUTE_PATH (name)) |
| { |
| if (access (name, mode) == 0) |
| return xstrdup (name); |
| |
| return NULL; |
| } |
| |
| info.name = name; |
| info.suffix = (mode & X_OK) != 0 ? HOST_EXECUTABLE_SUFFIX : ""; |
| info.name_len = strlen (info.name); |
| info.suffix_len = strlen (info.suffix); |
| info.mode = mode; |
| |
| return (char*) for_each_path (pprefix, do_multi, |
| info.name_len + info.suffix_len, |
| file_at_path, &info); |
| } |
| |
| /* Specialization of find_a_file for programs that also takes into account |
| configure-specified default programs. */ |
| |
| static char* |
| find_a_program (const char *name) |
| { |
| /* Do not search if default matches query. */ |
| |
| #ifdef DEFAULT_ASSEMBLER |
| if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, X_OK) == 0) |
| return xstrdup (DEFAULT_ASSEMBLER); |
| #endif |
| |
| #ifdef DEFAULT_LINKER |
| if (! strcmp (name, "ld") && access (DEFAULT_LINKER, X_OK) == 0) |
| return xstrdup (DEFAULT_LINKER); |
| #endif |
| |
| #ifdef DEFAULT_DSYMUTIL |
| if (! strcmp (name, "dsymutil") && access (DEFAULT_DSYMUTIL, X_OK) == 0) |
| return xstrdup (DEFAULT_DSYMUTIL); |
| #endif |
| |
| return find_a_file (&exec_prefixes, name, X_OK, false); |
| } |
| |
| /* Ranking of prefixes in the sort list. -B prefixes are put before |
| all others. */ |
| |
| enum path_prefix_priority |
| { |
| PREFIX_PRIORITY_B_OPT, |
| PREFIX_PRIORITY_LAST |
| }; |
| |
| /* Add an entry for PREFIX in PLIST. The PLIST is kept in ascending |
| order according to PRIORITY. Within each PRIORITY, new entries are |
| appended. |
| |
| If WARN is nonzero, we will warn if no file is found |
| through this prefix. WARN should point to an int |
| which will be set to 1 if this entry is used. |
| |
| COMPONENT is the value to be passed to update_path. |
| |
| REQUIRE_MACHINE_SUFFIX is 1 if this prefix can't be used without |
| the complete value of machine_suffix. |
| |