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/* Compiler driver program that can handle many languages.
Copyright (C) 1987-2015 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 "gcc.h"
#include "diagnostic.h"
#include "flags.h"
#include "opts.h"
#include "params.h"
#include "vec.h"
#include "filenames.h"
/* By default there is no special suffix for target executables. */
/* FIXME: when autoconf is fixed, remove the host check - dj */
#if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX)
#define HAVE_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 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
static const char *target_system_root = TARGET_SYSTEM_ROOT;
#else
static const char *target_system_root = 0;
#endif
/* 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_OBJ /* -save-temps in object directory */
} save_temps_flag;
/* Output file to use to get the object directory for -save-temps=obj */
static char *save_temps_prefix = 0;
static size_t save_temps_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. */
static char *offload_targets = NULL;
/* 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 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 *);
static const char *handle_spec_function (const char *, bool *);
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 *);
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);
static void validate_all_switches (void);
static inline void validate_switches_from_spec (const char *, bool);
static void give_switch (int, int);
static int used_arg (const char *, int);
static int default_arg (const char *, int);
static void set_multilib_dir (void);
static void print_multilib_info (void);
static void perror_with_name (const char *);
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 *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 *compare_debug_auxbase_opt_spec_function (int, const char **);
static const char *pass_through_libs_spec_func (int, const char **);
static const char *replace_extension_spec_func (int, const char **);
static char *convert_white_space (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.
%i substitute the name of the input file being processed.
%b substitute the basename of the input file being processed.
This is the substring up to (and not including) the last period
and not including the directory unless -save-temps was specified
to put temporaries in a different location.
%B same as %b, but include the 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 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 mark last argument supplied within
as a file to be deleted on failure.
%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.
%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 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*:%b%O}}%{!c:%U%O} \
%{c:%{o*:%:replace-extension(%{o*:%*} .dwo)}%{!o*:%b.dwo}}%{!c:%b.dwo} \n\
objcopy --strip-dwo \
%{c:%{o*:%*}%{!o*:%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. */
#define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}"
#ifndef LIBASAN_SPEC
#define STATIC_LIBASAN_LIBS \
" %{static-libasan:%: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 LIBTSAN_SPEC
#define STATIC_LIBTSAN_LIBS \
" %{static-libtsan:%: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:%: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:%: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. */
#ifndef ASM_DEBUG_SPEC
# 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 \
? "%{!g0:%{gdwarf*:--gdwarf2}%{!gdwarf*:%{g*:--gstabs}}}" ASM_MAP \
: "%{!g0:%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}}" ASM_MAP)
# else
# if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
# define ASM_DEBUG_SPEC "%{g*:%{!g0:--gstabs}}" ASM_MAP
# endif
# if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG)
# define ASM_DEBUG_SPEC "%{g*:%{!g0:--gdwarf2}}" ASM_MAP
# endif
# endif
#endif
#ifndef ASM_DEBUG_SPEC
# define ASM_DEBUG_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 %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
#ifndef LINK_PIE_SPEC
#ifdef HAVE_LD_PIE
#define LINK_PIE_SPEC "%{pie:-pie} "
#else
#define LINK_PIE_SPEC "%{pie:} "
#endif
#endif
#ifndef LINK_BUILDID_SPEC
# if defined(HAVE_LD_BUILDID) && defined(ENABLE_LD_BUILDID)
# define LINK_BUILDID_SPEC "%{!r:--build-id} "
# endif
#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 \
%{!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:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_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:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_SPEC "\
%{static:%ecannot specify -static with -fsanitize=address}}\
%{%:sanitize(thread):" LIBTSAN_SPEC "\
%{static:%ecannot specify -static with -fsanitize=thread}}\
%{%:sanitize(undefined):" LIBUBSAN_SPEC "}\
%{%:sanitize(leak):" LIBLSAN_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
#define VTABLE_VERIFICATION_SPEC "\
%{!nostdlib:%{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}}"
#endif
#ifndef CHKP_SPEC
#define CHKP_SPEC ""
#endif
/* -u* was put back because both BSD and SysV seem to support it. */
/* %{static:} simply prevents an error message if the target machine
doesn't handle -static. */
/* 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:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
%{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\
" CHKP_SPEC " \
%{fopenacc|fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
%{fcilkplus:%:include(libcilkrts.spec)%(link_cilkrts)}\
%{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
%(mflib) " STACK_SPLIT_SPEC "\
%{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \
%{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
%{!nostdlib:%{!nostartfiles:%E}} %{T*} }}}}}}"
#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 *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 *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*}\
%{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\
%{remap} %{g3|ggdb3|gstabs3|gcoff3|gxcoff3|gvms3:-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*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\
%{undef} %{save-temps*:-fpch-preprocess}";
/* This contains cpp options which are not passed when the preprocessor
output will be used by another program. */
static const char *cpp_debug_options = "%{d*}";
/* 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} %{!dumpbase:-dumpbase %B} %{d*} %{m*} %{aux-info*}\
%{fcompare-debug-second:%:compare-debug-auxbase-opt(%b)} \
%{!fcompare-debug-second:%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}}%{!c:%{!S:-auxbase %b}} \
%{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 %b.s}}}\
%{fsyntax-only:-o %j} %{-param*}\
%{coverage:-fprofile-arcs -ftest-coverage}";
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_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|ftree-parallelize-loops=*: " \
"-pthread}"
#endif
/* Likewise for -fgnu-tm. */
#ifndef GTM_SELF_SPECS
#define GTM_SELF_SPECS "%{fgnu-tm: -pthread}"
#endif
/* Likewise for -fcilkplus. */
#ifndef CILK_SELF_SPECS
#define CILK_SELF_SPECS "%{fcilkplus: -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,
CILK_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. */
const int combinable; /* If nonzero, compiler can deal with
multiple source files at once (IMA). */
const 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},
{".p", "#Pascal", 0, 0, 0}, {".pas", "#Pascal", 0, 0, 0},
{".java", "#Java", 0, 0, 0}, {".class", "#Java", 0, 0, 0},
{".zip", "#Java", 0, 0, 0}, {".jar", "#Java", 0, 0, 0},
{".go", "#Go", 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)\
%{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\
%W{o*:--output-pch=%*}}%V}\
%{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
cc1 %(cpp_unique_options) %(cc1_options)\
%{!fdump-ada-spec*:-o %g.s %{!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 */
};
#define INIT_STATIC_SPEC(NAME,PTR) \
{ NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, false, false }
/* 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_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", &lto_wrapper_spec),
INIT_STATIC_SPEC ("lto_gcc", &lto_gcc_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 },
{ "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 },
{ "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function },
{ "pass-through-libs", pass_through_libs_spec_func },
{ "replace-extension", replace_extension_spec_func },
#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;
buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}"
"%{!static:%{!static-libgcc:"
#if USE_LD_AS_NEEDED
"%{!shared-libgcc:",
static_name, " " LD_AS_NEEDED_OPTION " ",
shared_name, " " LD_NO_AS_NEEDED_OPTION
"}"
"%{shared-libgcc:",
shared_name, "%{!shared: ", static_name, "}"
"}"
#else
"%{!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;
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 == '-' && strncmp (p, "-lgcc", 5) == 0)
{
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:" LD_STATIC_OPTION "} -lunwind"
" %{!static:" LD_DYNAMIC_OPTION "}"
# else
" -lunwind"
# endif
#endif
);
p += 5;
in_sep = 0;
}
else if (in_sep && *p == 'l' && strncmp (p, "libgcc.a%s", 10) == 0)
{
/* 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;
}
/* 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;
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;
/* 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);
}
/* Clear out the vector of arguments (after a command is executed). */
static void
clear_args (void)
{
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)
{
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);
}
}
/* 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)
pfatal_with_name (filename);
if (stat (filename, &statbuf) < 0)
pfatal_with_name (filename);
/* Read contents of file into BUFFER. */
buffer = XNEWVEC (char, statbuf.st_size + 1);
readlen = read (desc, buffer, (unsigned) statbuf.st_size);
if (readlen < 0)
pfatal_with_name (filename);
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 (!strncmp (p1, "%include", sizeof ("%include") - 1)
&& (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 (!strncmp (p1, "%include_noerr", sizeof "%include_noerr" - 1)
&& (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 (!strncmp (p1, "%rename", sizeof "%rename" - 1)
&& (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);
}
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");
}
/* 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))
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) \
perror_with_name (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)
{
if (verbose_flag)
fnotice (stderr, "%s\n", string);
putenv (CONST_CAST (char *, 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;
#ifdef DEFAULT_ASSEMBLER
if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, mode) == 0)
return xstrdup (DEFAULT_ASSEMBLER);
#endif
#ifdef DEFAULT_LINKER
if (! strcmp (name, "ld") && access (DEFAULT_LINKER, mode) == 0)
return xstrdup (DEFAULT_LINKER);
#endif
/* Determine the filename to execute (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);
}
/* 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.
2 means try both machine_suffix and just_machine_suffix. */
static void
add_prefix (struct path_prefix *pprefix, const char *prefix,
const char *component, /* enum prefix_priority */ int priority,
int require_machine_suffix, int os_multilib)
{
struct prefix_list *pl, **prev;
int len;
for (prev = &pprefix->plist;
(*prev) != NULL && (*prev)->priority <= priority;
prev = &(*prev)->next)
;
/* Keep track of the longest prefix. */
prefix = update_path (prefix, component);
len = strlen (prefix);
if (len > pprefix->max_len)
pprefix->max_len = len;
pl = XNEW (struct prefix_list);
pl->prefix = prefix;
pl->require_machine_suffix = require_machine_suffix;
pl->priority = priority;
pl->os_multilib = os_multilib;
/* Insert after PREV. */
pl->next = (*prev);
(*prev) = pl;
}
/* Same as add_prefix, but prepending target_system_root to prefix. */
/* The target_system_root prefix has been relocated by gcc_exec_prefix. */
static void
add_sysrooted_prefix (struct path_prefix *pprefix, const char *prefix,
const char *component,
/* enum prefix_priority */ int priority,
int require_machine_suffix, int os_multilib)
{
if (!IS_ABSOLUTE_PATH (prefix))
fatal_error (input_location, "system path %qs is not absolute", prefix);
if (target_system_root)
{
char *sysroot_no_trailing_dir_separator = xstrdup (target_system_root);
size_t sysroot_len = strlen (target_system_root);
if (sysroot_len > 0
&& target_system_root[sysroot_len - 1] == DIR_SEPARATOR)
sysroot_no_trailing_dir_separator[sysroot_len - 1] = '\0';
if (target_sysroot_suffix)
prefix = concat (sysroot_no_trailing_dir_separator,
target_sysroot_suffix, prefix, NULL);
else
prefix = concat (sysroot_no_trailing_dir_separator, prefix, NULL);
free (sysroot_no_trailing_dir_separator);
/* We have to override this because GCC's notion of sysroot
moves along with GCC. */
component = "GCC";
}
add_prefix (pprefix, prefix, component, priority,
require_machine_suffix, os_multilib);
}
/* Execute the command specified by the arguments on the current line of spec.
When using pipes, this includes several piped-together commands
with `|' between them.
Return 0 if successful, -1 if failed. */
static int
execute (void)
{
int i;
int n_commands; /* # of command. */
char *string;
struct pex_obj *pex;
struct command
{
const char *prog; /* program name. */
const char **argv; /* vector of args. */
};
const char *arg;
struct command *commands; /* each command buffer with above info. */
gcc_assert (!processing_spec_function);
if (wrapper_string)
{
string = find_a_file (&exec_prefixes,
argbuf[0], X_OK, false);
if (string)
argbuf[0] = string;
insert_wrapper (wrapper_string);
}
/* Count # of piped commands. */
for (n_commands = 1, i = 0; argbuf.iterate (i, &arg); i++)
if (strcmp (arg, "|") == 0)
n_commands++;
/* Get storage for each command. */
commands = (struct command *) alloca (n_commands * sizeof (struct command));
/* Split argbuf into its separate piped processes,
and record info about each one.
Also search for the programs that are to be run. */
argbuf.safe_push (0);
commands[0].prog = argbuf[0]; /* first command. */
commands[0].argv = argbuf.address ();
if (!wrapper_string)
{
string = find_a_file (&exec_prefixes, commands[0].prog, X_OK, false);
commands[0].argv[0] = (string) ? string : commands[0].argv[0];
}
for (n_commands = 1, i = 0; argbuf.iterate (i, &arg); i++)
if (arg && strcmp (arg, "|") == 0)
{ /* each command. */
#if defined (__MSDOS__) || defined (OS2) || defined (VMS)
fatal_error (input_location, "-pipe not supported");
#endif
argbuf[i] = 0; /* Termination of
command args. */
commands[n_commands].prog = argbuf[i + 1];
commands[n_commands].argv
= &(argbuf.address ())[i + 1];
string = find_a_file (&exec_prefixes, commands[n_commands].prog,
X_OK, false);
if (string)
commands[n_commands].argv[0] = string;
n_commands++;
}
/* If -v, print what we are about to do, and maybe query. */
if (verbose_flag)
{
/* For help listings, put a blank line between sub-processes. */
if (print_help_list)
fputc ('\n', stderr);
/* Print each piped command as a separate line. */
for (i = 0; i < n_commands; i++)
{
const char *const *j;
if (verbose_only_flag)
{
for (j = commands[i].argv; *j; j++)
{
const char *p;
for (p = *j; *p; ++p)
if (!ISALNUM ((unsigned char) *p)
&& *p != '_' && *p != '/' && *p != '-' && *p != '.')
break;
if (*p || !*j)
{
fprintf (stderr, " \"");
for (p = *j; *p; ++p)
{
if (*p == '"' || *p == '\\' || *p == '$')
fputc ('\\', stderr);
fputc (*p, stderr);
}
fputc ('"', stderr);
}
/* If it's empty, print "". */
else if (!**j)
fprintf (stderr, " \"\"");
else
fprintf (stderr, " %s", *j);
}
}
else
for (j = commands[i].argv; *j; j++)
/* If it's empty, print "". */
if (!**j)
fprintf (stderr, " \"\"");
else
fprintf (stderr, " %s", *j);
/* Print a pipe symbol after all but the last command. */
if (i + 1 != n_commands)
fprintf (stderr, " |");
fprintf (stderr, "\n");
}
fflush (stderr);
if (verbose_only_flag != 0)
{
/* verbose_only_flag should act as if the spec was
executed, so increment execution_count before
returning. This prevents spurious warnings about
unused linker input files, etc. */
execution_count++;
return 0;
}
#ifdef DEBUG
fnotice (stderr, "\nGo ahead? (y or n) ");
fflush (stderr);
i = getchar ();
if (i != '\n')
while (getchar () != '\n')
;
if (i != 'y' && i != 'Y')
return 0;
#endif /* DEBUG */
}
#ifdef ENABLE_VALGRIND_CHECKING
/* Run the each command through valgrind. To simplify prepending the
path to valgrind and the option "-q" (for quiet operation unless
something triggers), we allocate a separate argv array. */
for (i = 0; i < n_commands; i++)
{
const char **argv;
int argc;
int j;
for (argc = 0; commands[i].argv[argc] != NULL; argc++)
;
argv = XALLOCAVEC (const char *, argc + 3);
argv[0] = VALGRIND_PATH;
argv[1] = "-q";
for (j = 2; j < argc + 2; j++)
argv[j] = commands[i].argv[j - 2];
argv[j] = NULL;
commands[i].argv = argv;
commands[i].prog = argv[0];
}
#endif
/* Run each piped subprocess. */
pex = pex_init (PEX_USE_PIPES | ((report_times || report_times_to_file)
? PEX_RECORD_TIMES : 0),
progname, temp_filename);
if (pex == NULL)
fatal_error (input_location, "pex_init failed: %m");
for (i = 0; i < n_commands; i++)
{
const char *errmsg;
int err;
const char *string = commands[i].argv[0];
errmsg = pex_run (pex,
((i + 1 == n_commands ? PEX_LAST : 0)
| (string == commands[i].prog ? PEX_SEARCH : 0)),
string, CONST_CAST (char **, commands[i].argv),
NULL, NULL, &err);
if (errmsg != NULL)
{
if (err == 0)
fatal_error (input_location, errmsg);
else
{
errno = err;
pfatal_with_name (errmsg);
}
}
if (i && string != commands[i].prog)
free (CONST_CAST (char *, string));
}
execution_count++;
/* Wait for all the subprocesses to finish. */
{
int *statuses;
struct pex_time *times = NULL;
int ret_code = 0;
statuses = (int *) alloca (n_commands * sizeof (int));
if (!pex_get_status (pex, n_commands, statuses))
fatal_error (input_location, "failed to get exit status: %m");
if (report_times || report_times_to_file)
{
times = (struct pex_time *) alloca (n_commands * sizeof (struct pex_time));
if (!pex_get_times (pex, n_commands, times))
fatal_error (input_location, "failed to get process times: %m");
}
pex_free (pex);
for (i = 0; i < n_commands; ++i)
{
int status = statuses[i];
if (WIFSIGNALED (status))
{
#ifdef SIGPIPE
/* SIGPIPE is a special case. It happens in -pipe mode
when the compiler dies before the preprocessor is done,
or the assembler dies before the compiler is done.
There's generally been an error already, and this is
just fallout. So don't generate another error unless
we would otherwise have succeeded. */
if (WTERMSIG (status) == SIGPIPE
&& (signal_count || greatest_status >= MIN_FATAL_STATUS))
{
signal_count++;
ret_code = -1;
}
else
#endif
internal_error_no_backtrace ("%s (program %s)",
strsignal (WTERMSIG (status)),
commands[i].prog);
}
else if (WIFEXITED (status)
&& WEXITSTATUS (status) >= MIN_FATAL_STATUS)
{
/* For ICEs in cc1, cc1obj, cc1plus see if it is
reproducible or not. */
const char *p;
if (flag_report_bug
&& WEXITSTATUS (status) == ICE_EXIT_CODE
&& i == 0
&& (p = strrchr (commands[0].argv[0], DIR_SEPARATOR))
&& ! strncmp (p + 1, "cc1", 3))
try_generate_repro (commands[0].argv);
if (WEXITSTATUS (status) > greatest_status)
greatest_status = WEXITSTATUS (status);
ret_code = -1;
}
if (report_times || report_times_to_file)
{
struct pex_time *pt = &times[i];
double ut, st;
ut = ((double) pt->user_seconds
+ (double) pt->user_microseconds / 1.0e6);
st = ((double) pt->system_seconds
+ (double) pt->system_microseconds / 1.0e6);
if (ut + st != 0)
{
if (report_times)
fnotice (stderr, "# %s %.2f %.2f\n",
commands[i].prog, ut, st);
if (report_times_to_file)
{
int c = 0;
const char *const *j;
fprintf (report_times_to_file, "%g %g", ut, st);
for (j = &commands[i].prog; *j; j = &commands[i].argv[++c])
{
const char *p;
for (p = *j; *p; ++p)
if (*p == '"' || *p == '\\' || *p == '$'
|| ISSPACE (*p))
break;
if (*p)
{
fprintf (report_times_to_file, " \"");
for (p = *j; *p; ++p)
{
if (*p == '"' || *p == '\\' || *p == '$')
fputc ('\\', report_times_to_file);
fputc (*p, report_times_to_file);
}
fputc ('"', report_times_to_file);
}
else
fprintf (report_times_to_file, " %s", *j);
}
fputc ('\n', report_times_to_file);
}
}
}
}
if (commands[0].argv[0] != commands[0].prog)
free (CONST_CAST (char *, commands[0].argv[0]));
return ret_code;
}
}
/* Find all the switches given to us
and make a vector describing them.
The elements of the vector are strings, one per switch given.
If a switch uses following arguments, then the `part1' field
is the switch itself and the `args' field
is a null-terminated vector containing the following arguments.
Bits in the `live_cond' field are:
SWITCH_LIVE to indicate this switch is true in a conditional spec.
SWITCH_FALSE to indicate this switch is overridden by a later switch.
SWITCH_IGNORE to indicate this switch should be ignored (used in %<S).
SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored
in all do_spec calls afterwards. Used for %<S from self specs.
The `validated' field is nonzero if any spec has looked at this switch;
if it remains zero at the end of the run, it must be meaningless. */
#define SWITCH_LIVE (1 << 0)
#define SWITCH_FALSE (1 << 1)
#define SWITCH_IGNORE (1 << 2)
#define SWITCH_IGNORE_PERMANENTLY (1 << 3)
#define SWITCH_KEEP_FOR_GCC (1 << 4)
struct switchstr
{
const char *part1;
const char **args;
unsigned int live_cond;
bool known;
bool validated;
bool ordering;
};
static struct switchstr *switches;
static int n_switches;
static int n_switches_alloc;
/* Set to zero if -fcompare-debug is disabled, positive if it's
enabled and we're running the first compilation, negative if it's
enabled and we're running the second compilation. For most of the
time, it's in the range -1..1, but it can be temporarily set to 2
or 3 to indicate that the -fcompare-debug flags didn't come from
the command-line, but rather from the GCC_COMPARE_DEBUG environment
variable, until a synthesized -fcompare-debug flag is added to the
command line. */