| /* Set up combined include path chain for the preprocessor. |
| Copyright (C) 1986-2020 Free Software Foundation, Inc. |
| |
| Broken out of cppinit.c and cppfiles.c and rewritten Mar 2003. |
| |
| This program 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. |
| |
| This program 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 this program; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "target.h" |
| #include "cpplib.h" |
| #include "prefix.h" |
| #include "intl.h" |
| #include "incpath.h" |
| #include "cppdefault.h" |
| |
| /* Microsoft Windows does not natively support inodes. |
| VMS has non-numeric inodes. */ |
| #ifdef VMS |
| # define INO_T_EQ(A, B) (!memcmp (&(A), &(B), sizeof (A))) |
| # define INO_T_COPY(DEST, SRC) memcpy (&(DEST), &(SRC), sizeof (SRC)) |
| #elif !defined (HOST_LACKS_INODE_NUMBERS) |
| # define INO_T_EQ(A, B) ((A) == (B)) |
| # define INO_T_COPY(DEST, SRC) (DEST) = (SRC) |
| #endif |
| |
| #if defined INO_T_EQ |
| #define DIRS_EQ(A, B) ((A)->dev == (B)->dev \ |
| && INO_T_EQ ((A)->ino, (B)->ino)) |
| #else |
| #define DIRS_EQ(A, B) (!filename_cmp ((A)->canonical_name, (B)->canonical_name)) |
| #endif |
| |
| static const char dir_separator_str[] = { DIR_SEPARATOR, 0 }; |
| |
| static void add_env_var_paths (const char *, incpath_kind); |
| static void add_standard_paths (const char *, const char *, const char *, int); |
| static void free_path (struct cpp_dir *, int); |
| static void merge_include_chains (const char *, cpp_reader *, int); |
| static void add_sysroot_to_chain (const char *, int); |
| static struct cpp_dir *remove_duplicates (cpp_reader *, struct cpp_dir *, |
| struct cpp_dir *, |
| struct cpp_dir *, int); |
| |
| /* Include chains heads and tails. */ |
| static struct cpp_dir *heads[INC_MAX]; |
| static struct cpp_dir *tails[INC_MAX]; |
| |
| static bool quote_ignores_source_dir; |
| enum { REASON_QUIET = 0, REASON_NOENT, REASON_DUP, REASON_DUP_SYS }; |
| |
| /* Free an element of the include chain, possibly giving a reason. */ |
| static void |
| free_path (struct cpp_dir *path, int reason) |
| { |
| switch (reason) |
| { |
| case REASON_DUP: |
| case REASON_DUP_SYS: |
| fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), path->name); |
| if (reason == REASON_DUP_SYS) |
| fprintf (stderr, |
| _(" as it is a non-system directory that duplicates a system directory\n")); |
| break; |
| |
| case REASON_NOENT: |
| fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"), |
| path->name); |
| break; |
| |
| case REASON_QUIET: |
| default: |
| break; |
| } |
| |
| free (path->name); |
| free (path); |
| } |
| |
| /* Read ENV_VAR for a PATH_SEPARATOR-separated list of file names; and |
| append all the names to the search path CHAIN. */ |
| static void |
| add_env_var_paths (const char *env_var, incpath_kind chain) |
| { |
| char *p, *q, *path; |
| |
| q = getenv (env_var); |
| |
| if (!q) |
| return; |
| |
| for (p = q; *q; p = q + 1) |
| { |
| q = p; |
| while (*q != 0 && *q != PATH_SEPARATOR) |
| q++; |
| |
| if (p == q) |
| path = xstrdup ("."); |
| else |
| { |
| path = XNEWVEC (char, q - p + 1); |
| memcpy (path, p, q - p); |
| path[q - p] = '\0'; |
| } |
| |
| add_path (path, chain, chain == INC_SYSTEM, false); |
| } |
| } |
| |
| /* Append the standard include chain defined in cppdefault.c. */ |
| static void |
| add_standard_paths (const char *sysroot, const char *iprefix, |
| const char *imultilib, int cxx_stdinc) |
| { |
| const struct default_include *p; |
| int relocated = cpp_relocated (); |
| size_t len; |
| |
| if (iprefix && (len = cpp_GCC_INCLUDE_DIR_len) != 0) |
| { |
| /* Look for directories that start with the standard prefix. |
| "Translate" them, i.e. replace /usr/local/lib/gcc... with |
| IPREFIX and search them first. */ |
| for (p = cpp_include_defaults; p->fname; p++) |
| { |
| if (!p->cplusplus || cxx_stdinc) |
| { |
| /* Should we be translating sysrooted dirs too? Assume |
| that iprefix and sysroot are mutually exclusive, for |
| now. */ |
| if (sysroot && p->add_sysroot) |
| continue; |
| if (!filename_ncmp (p->fname, cpp_GCC_INCLUDE_DIR, len)) |
| { |
| char *str = concat (iprefix, p->fname + len, NULL); |
| if (p->multilib == 1 && imultilib) |
| str = reconcat (str, str, dir_separator_str, |
| imultilib, NULL); |
| else if (p->multilib == 2) |
| { |
| if (!imultiarch) |
| { |
| free (str); |
| continue; |
| } |
| str = reconcat (str, str, dir_separator_str, |
| imultiarch, NULL); |
| } |
| add_path (str, INC_SYSTEM, p->cxx_aware, false); |
| } |
| } |
| } |
| } |
| |
| for (p = cpp_include_defaults; p->fname; p++) |
| { |
| if (!p->cplusplus || cxx_stdinc) |
| { |
| char *str; |
| |
| /* Should this directory start with the sysroot? */ |
| if (sysroot && p->add_sysroot) |
| { |
| char *sysroot_no_trailing_dir_separator = xstrdup (sysroot); |
| size_t sysroot_len = strlen (sysroot); |
| |
| if (sysroot_len > 0 && sysroot[sysroot_len - 1] == DIR_SEPARATOR) |
| sysroot_no_trailing_dir_separator[sysroot_len - 1] = '\0'; |
| str = concat (sysroot_no_trailing_dir_separator, p->fname, NULL); |
| free (sysroot_no_trailing_dir_separator); |
| } |
| else if (!p->add_sysroot && relocated |
| && !filename_ncmp (p->fname, cpp_PREFIX, cpp_PREFIX_len)) |
| { |
| static const char *relocated_prefix; |
| char *ostr; |
| /* If this path starts with the configure-time prefix, |
| but the compiler has been relocated, replace it |
| with the run-time prefix. The run-time exec prefix |
| is GCC_EXEC_PREFIX. Compute the path from there back |
| to the toplevel prefix. */ |
| if (!relocated_prefix) |
| { |
| char *dummy; |
| /* Make relative prefix expects the first argument |
| to be a program, not a directory. */ |
| dummy = concat (gcc_exec_prefix, "dummy", NULL); |
| relocated_prefix |
| = make_relative_prefix (dummy, |
| cpp_EXEC_PREFIX, |
| cpp_PREFIX); |
| free (dummy); |
| } |
| ostr = concat (relocated_prefix, |
| p->fname + cpp_PREFIX_len, |
| NULL); |
| str = update_path (ostr, p->component); |
| free (ostr); |
| } |
| else |
| str = update_path (p->fname, p->component); |
| |
| if (p->multilib == 1 && imultilib) |
| str = reconcat (str, str, dir_separator_str, imultilib, NULL); |
| else if (p->multilib == 2) |
| { |
| if (!imultiarch) |
| { |
| free (str); |
| continue; |
| } |
| str = reconcat (str, str, dir_separator_str, imultiarch, NULL); |
| } |
| |
| add_path (str, INC_SYSTEM, p->cxx_aware, false); |
| } |
| } |
| } |
| |
| /* For each duplicate path in chain HEAD, keep just the first one. |
| Remove each path in chain HEAD that also exists in chain SYSTEM. |
| Set the NEXT pointer of the last path in the resulting chain to |
| JOIN, unless it duplicates JOIN in which case the last path is |
| removed. Return the head of the resulting chain. Any of HEAD, |
| JOIN and SYSTEM can be NULL. */ |
| |
| static struct cpp_dir * |
| remove_duplicates (cpp_reader *pfile, struct cpp_dir *head, |
| struct cpp_dir *system, struct cpp_dir *join, |
| int verbose) |
| { |
| struct cpp_dir **pcur, *tmp, *cur; |
| struct stat st; |
| |
| for (pcur = &head; *pcur; ) |
| { |
| int reason = REASON_QUIET; |
| |
| cur = *pcur; |
| |
| if (stat (cur->name, &st)) |
| { |
| /* Dirs that don't exist or have denied permissions are |
| silently ignored, unless verbose. */ |
| if ((errno != ENOENT) && (errno != EPERM)) |
| cpp_errno (pfile, CPP_DL_ERROR, cur->name); |
| else |
| { |
| /* If -Wmissing-include-dirs is given, warn. */ |
| cpp_options *opts = cpp_get_options (pfile); |
| if (opts->warn_missing_include_dirs && cur->user_supplied_p) |
| cpp_warning (pfile, CPP_W_MISSING_INCLUDE_DIRS, "%s: %s", |
| cur->name, xstrerror (errno)); |
| reason = REASON_NOENT; |
| } |
| } |
| else if (!S_ISDIR (st.st_mode)) |
| cpp_error_with_line (pfile, CPP_DL_WARNING, 0, 0, |
| "%s: not a directory", cur->name); |
| else |
| { |
| #if defined (INO_T_COPY) |
| INO_T_COPY (cur->ino, st.st_ino); |
| cur->dev = st.st_dev; |
| #endif |
| |
| /* Remove this one if it is in the system chain. */ |
| reason = REASON_DUP_SYS; |
| for (tmp = system; tmp; tmp = tmp->next) |
| if (DIRS_EQ (tmp, cur) && cur->construct == tmp->construct) |
| break; |
| |
| if (!tmp) |
| { |
| /* Duplicate of something earlier in the same chain? */ |
| reason = REASON_DUP; |
| for (tmp = head; tmp != cur; tmp = tmp->next) |
| if (DIRS_EQ (cur, tmp) && cur->construct == tmp->construct) |
| break; |
| |
| if (tmp == cur |
| /* Last in the chain and duplicate of JOIN? */ |
| && !(cur->next == NULL && join |
| && DIRS_EQ (cur, join) |
| && cur->construct == join->construct)) |
| { |
| /* Unique, so keep this directory. */ |
| pcur = &cur->next; |
| continue; |
| } |
| } |
| } |
| |
| /* Remove this entry from the chain. */ |
| *pcur = cur->next; |
| free_path (cur, verbose ? reason: REASON_QUIET); |
| } |
| |
| *pcur = join; |
| return head; |
| } |
| |
| /* Add SYSROOT to any user-supplied paths in CHAIN starting with |
| "=" or "$SYSROOT". */ |
| |
| static void |
| add_sysroot_to_chain (const char *sysroot, int chain) |
| { |
| struct cpp_dir *p; |
| |
| for (p = heads[chain]; p != NULL; p = p->next) |
| { |
| if (p->user_supplied_p) |
| { |
| if (p->name[0] == '=') |
| p->name = concat (sysroot, p->name + 1, NULL); |
| if (strncmp (p->name, "$SYSROOT", strlen ("$SYSROOT")) == 0) |
| p->name = concat (sysroot, p->name + strlen ("$SYSROOT"), NULL); |
| } |
| } |
| } |
| |
| /* Merge the four include chains together in the order quote, bracket, |
| system, after. Remove duplicate dirs (determined in |
| system-specific manner). |
| |
| We can't just merge the lists and then uniquify them because then |
| we may lose directories from the <> search path that should be |
| there; consider -iquote foo -iquote bar -Ifoo -Iquux. It is |
| however safe to treat -iquote bar -iquote foo -Ifoo -Iquux as if |
| written -iquote bar -Ifoo -Iquux. */ |
| |
| static void |
| merge_include_chains (const char *sysroot, cpp_reader *pfile, int verbose) |
| { |
| /* Add the sysroot to user-supplied paths starting with "=". */ |
| if (sysroot) |
| { |
| add_sysroot_to_chain (sysroot, INC_QUOTE); |
| add_sysroot_to_chain (sysroot, INC_BRACKET); |
| add_sysroot_to_chain (sysroot, INC_SYSTEM); |
| add_sysroot_to_chain (sysroot, INC_AFTER); |
| } |
| |
| /* Join the SYSTEM and AFTER chains. Remove duplicates in the |
| resulting SYSTEM chain. */ |
| if (heads[INC_SYSTEM]) |
| tails[INC_SYSTEM]->next = heads[INC_AFTER]; |
| else |
| heads[INC_SYSTEM] = heads[INC_AFTER]; |
| heads[INC_SYSTEM] |
| = remove_duplicates (pfile, heads[INC_SYSTEM], 0, 0, verbose); |
| |
| /* Remove duplicates from BRACKET that are in itself or SYSTEM, and |
| join it to SYSTEM. */ |
| heads[INC_BRACKET] |
| = remove_duplicates (pfile, heads[INC_BRACKET], heads[INC_SYSTEM], |
| heads[INC_SYSTEM], verbose); |
| |
| /* Remove duplicates from QUOTE that are in itself or SYSTEM, and |
| join it to BRACKET. */ |
| heads[INC_QUOTE] |
| = remove_duplicates (pfile, heads[INC_QUOTE], heads[INC_SYSTEM], |
| heads[INC_BRACKET], verbose); |
| |
| /* If verbose, print the list of dirs to search. */ |
| if (verbose) |
| { |
| struct cpp_dir *p; |
| |
| fprintf (stderr, _("#include \"...\" search starts here:\n")); |
| for (p = heads[INC_QUOTE];; p = p->next) |
| { |
| if (p == heads[INC_BRACKET]) |
| fprintf (stderr, _("#include <...> search starts here:\n")); |
| if (!p) |
| break; |
| fprintf (stderr, " %s\n", p->name); |
| } |
| fprintf (stderr, _("End of search list.\n")); |
| } |
| } |
| |
| /* Use given -I paths for #include "..." but not #include <...>, and |
| don't search the directory of the present file for #include "...". |
| (Note that -I. -I- is not the same as the default setup; -I. uses |
| the compiler's working dir.) */ |
| void |
| split_quote_chain (void) |
| { |
| if (heads[INC_QUOTE]) |
| free_path (heads[INC_QUOTE], REASON_QUIET); |
| if (tails[INC_QUOTE]) |
| free_path (tails[INC_QUOTE], REASON_QUIET); |
| heads[INC_QUOTE] = heads[INC_BRACKET]; |
| tails[INC_QUOTE] = tails[INC_BRACKET]; |
| heads[INC_BRACKET] = NULL; |
| tails[INC_BRACKET] = NULL; |
| /* This is NOT redundant. */ |
| quote_ignores_source_dir = true; |
| } |
| |
| /* Add P to the chain specified by CHAIN. */ |
| |
| void |
| add_cpp_dir_path (cpp_dir *p, incpath_kind chain) |
| { |
| if (tails[chain]) |
| tails[chain]->next = p; |
| else |
| heads[chain] = p; |
| tails[chain] = p; |
| } |
| |
| /* Add PATH to the include chain CHAIN. PATH must be malloc-ed and |
| NUL-terminated. */ |
| void |
| add_path (char *path, incpath_kind chain, int cxx_aware, bool user_supplied_p) |
| { |
| cpp_dir *p; |
| |
| #if defined (HAVE_DOS_BASED_FILE_SYSTEM) |
| /* Remove unnecessary trailing slashes. On some versions of MS |
| Windows, trailing _forward_ slashes cause no problems for stat(). |
| On newer versions, stat() does not recognize a directory that ends |
| in a '\\' or '/', unless it is a drive root dir, such as "c:/", |
| where it is obligatory. */ |
| int pathlen = strlen (path); |
| char* end = path + pathlen - 1; |
| /* Preserve the lead '/' or lead "c:/". */ |
| char* start = path + (pathlen > 2 && path[1] == ':' ? 3 : 1); |
| |
| for (; end > start && IS_DIR_SEPARATOR (*end); end--) |
| *end = 0; |
| #endif |
| |
| p = XNEW (cpp_dir); |
| p->next = NULL; |
| p->name = path; |
| #ifndef INO_T_EQ |
| p->canonical_name = lrealpath (path); |
| #endif |
| if (chain == INC_SYSTEM || chain == INC_AFTER) |
| p->sysp = 1 + !cxx_aware; |
| else |
| p->sysp = 0; |
| p->construct = 0; |
| p->user_supplied_p = user_supplied_p; |
| |
| add_cpp_dir_path (p, chain); |
| } |
| |
| /* Exported function to handle include chain merging, duplicate |
| removal, and registration with cpplib. */ |
| void |
| register_include_chains (cpp_reader *pfile, const char *sysroot, |
| const char *iprefix, const char *imultilib, |
| int stdinc, int cxx_stdinc, int verbose) |
| { |
| static const char *const lang_env_vars[] = |
| { "C_INCLUDE_PATH", "CPLUS_INCLUDE_PATH", |
| "OBJC_INCLUDE_PATH", "OBJCPLUS_INCLUDE_PATH" }; |
| cpp_options *cpp_opts = cpp_get_options (pfile); |
| size_t idx = (cpp_opts->objc ? 2: 0); |
| |
| if (cpp_opts->cplusplus) |
| idx++; |
| else |
| cxx_stdinc = false; |
| |
| /* CPATH and language-dependent environment variables may add to the |
| include chain. */ |
| add_env_var_paths ("CPATH", INC_BRACKET); |
| add_env_var_paths (lang_env_vars[idx], INC_SYSTEM); |
| |
| target_c_incpath.extra_pre_includes (sysroot, iprefix, stdinc); |
| |
| /* Finally chain on the standard directories. */ |
| if (stdinc) |
| add_standard_paths (sysroot, iprefix, imultilib, cxx_stdinc); |
| |
| target_c_incpath.extra_includes (sysroot, iprefix, stdinc); |
| |
| merge_include_chains (sysroot, pfile, verbose); |
| |
| cpp_set_include_chains (pfile, heads[INC_QUOTE], heads[INC_BRACKET], |
| quote_ignores_source_dir); |
| } |
| |
| /* Return the current chain of cpp dirs. */ |
| |
| struct cpp_dir * |
| get_added_cpp_dirs (incpath_kind chain) |
| { |
| return heads[chain]; |
| } |
| |
| #if !(defined TARGET_EXTRA_INCLUDES) || !(defined TARGET_EXTRA_PRE_INCLUDES) |
| static void hook_void_charptr_charptr_int (const char *sysroot ATTRIBUTE_UNUSED, |
| const char *iprefix ATTRIBUTE_UNUSED, |
| int stdinc ATTRIBUTE_UNUSED) |
| { |
| } |
| #endif |
| |
| #ifndef TARGET_EXTRA_INCLUDES |
| #define TARGET_EXTRA_INCLUDES hook_void_charptr_charptr_int |
| #endif |
| #ifndef TARGET_EXTRA_PRE_INCLUDES |
| #define TARGET_EXTRA_PRE_INCLUDES hook_void_charptr_charptr_int |
| #endif |
| |
| struct target_c_incpath_s target_c_incpath = { TARGET_EXTRA_PRE_INCLUDES, TARGET_EXTRA_INCLUDES }; |
| |