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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [darwin-c.c] - Rev 283
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/* Darwin support needed only by C/C++ frontends. Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. Contributed by Apple Computer 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/>. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "cpplib.h" #include "tree.h" #include "c-pragma.h" #include "c-tree.h" #include "incpath.h" #include "c-common.h" #include "toplev.h" #include "flags.h" #include "tm_p.h" #include "cppdefault.h" #include "prefix.h" #include "target.h" #include "target-def.h" /* Pragmas. */ #define BAD(gmsgid) do { warning (OPT_Wpragmas, gmsgid); return; } while (0) #define BAD2(msgid, arg) do { warning (OPT_Wpragmas, msgid, arg); return; } while (0) static bool using_frameworks = false; static const char *find_subframework_header (cpp_reader *pfile, const char *header, cpp_dir **dirp); typedef struct align_stack { int alignment; struct align_stack * prev; } align_stack; static struct align_stack * field_align_stack = NULL; /* Maintain a small stack of alignments. This is similar to pragma pack's stack, but simpler. */ static void push_field_alignment (int bit_alignment) { align_stack *entry = XNEW (align_stack); entry->alignment = maximum_field_alignment; entry->prev = field_align_stack; field_align_stack = entry; maximum_field_alignment = bit_alignment; } static void pop_field_alignment (void) { if (field_align_stack) { align_stack *entry = field_align_stack; maximum_field_alignment = entry->alignment; field_align_stack = entry->prev; free (entry); } else error ("too many #pragma options align=reset"); } /* Handlers for Darwin-specific pragmas. */ void darwin_pragma_ignore (cpp_reader *pfile ATTRIBUTE_UNUSED) { /* Do nothing. */ } /* #pragma options align={mac68k|power|reset} */ void darwin_pragma_options (cpp_reader *pfile ATTRIBUTE_UNUSED) { const char *arg; tree t, x; if (pragma_lex (&t) != CPP_NAME) BAD ("malformed '#pragma options', ignoring"); arg = IDENTIFIER_POINTER (t); if (strcmp (arg, "align")) BAD ("malformed '#pragma options', ignoring"); if (pragma_lex (&t) != CPP_EQ) BAD ("malformed '#pragma options', ignoring"); if (pragma_lex (&t) != CPP_NAME) BAD ("malformed '#pragma options', ignoring"); if (pragma_lex (&x) != CPP_EOF) warning (OPT_Wpragmas, "junk at end of '#pragma options'"); arg = IDENTIFIER_POINTER (t); if (!strcmp (arg, "mac68k")) push_field_alignment (16); else if (!strcmp (arg, "power")) push_field_alignment (0); else if (!strcmp (arg, "reset")) pop_field_alignment (); else BAD ("malformed '#pragma options align={mac68k|power|reset}', ignoring"); } /* #pragma unused ([var {, var}*]) */ void darwin_pragma_unused (cpp_reader *pfile ATTRIBUTE_UNUSED) { tree decl, x; int tok; if (pragma_lex (&x) != CPP_OPEN_PAREN) BAD ("missing '(' after '#pragma unused', ignoring"); while (1) { tok = pragma_lex (&decl); if (tok == CPP_NAME && decl) { tree local = lookup_name (decl); if (local && (TREE_CODE (local) == PARM_DECL || TREE_CODE (local) == VAR_DECL)) TREE_USED (local) = 1; tok = pragma_lex (&x); if (tok != CPP_COMMA) break; } } if (tok != CPP_CLOSE_PAREN) BAD ("missing ')' after '#pragma unused', ignoring"); if (pragma_lex (&x) != CPP_EOF) BAD ("junk at end of '#pragma unused'"); } /* Parse the ms_struct pragma. */ void darwin_pragma_ms_struct (cpp_reader *pfile ATTRIBUTE_UNUSED) { const char *arg; tree t; if (pragma_lex (&t) != CPP_NAME) BAD ("malformed '#pragma ms_struct', ignoring"); arg = IDENTIFIER_POINTER (t); if (!strcmp (arg, "on")) darwin_ms_struct = true; else if (!strcmp (arg, "off") || !strcmp (arg, "reset")) darwin_ms_struct = false; else BAD ("malformed '#pragma ms_struct {on|off|reset}', ignoring"); if (pragma_lex (&t) != CPP_EOF) BAD ("junk at end of '#pragma ms_struct'"); } static struct frameworks_in_use { size_t len; const char *name; cpp_dir* dir; } *frameworks_in_use; static int num_frameworks = 0; static int max_frameworks = 0; /* Remember which frameworks have been seen, so that we can ensure that all uses of that framework come from the same framework. DIR is the place where the named framework NAME, which is of length LEN, was found. We copy the directory name from NAME, as it will be freed by others. */ static void add_framework (const char *name, size_t len, cpp_dir *dir) { char *dir_name; int i; for (i = 0; i < num_frameworks; ++i) { if (len == frameworks_in_use[i].len && strncmp (name, frameworks_in_use[i].name, len) == 0) { return; } } if (i >= max_frameworks) { max_frameworks = i*2; max_frameworks += i == 0; frameworks_in_use = XRESIZEVEC (struct frameworks_in_use, frameworks_in_use, max_frameworks); } dir_name = XNEWVEC (char, len + 1); memcpy (dir_name, name, len); dir_name[len] = '\0'; frameworks_in_use[num_frameworks].name = dir_name; frameworks_in_use[num_frameworks].len = len; frameworks_in_use[num_frameworks].dir = dir; ++num_frameworks; } /* Recall if we have seen the named framework NAME, before, and where we saw it. NAME is LEN bytes long. The return value is the place where it was seen before. */ static struct cpp_dir* find_framework (const char *name, size_t len) { int i; for (i = 0; i < num_frameworks; ++i) { if (len == frameworks_in_use[i].len && strncmp (name, frameworks_in_use[i].name, len) == 0) { return frameworks_in_use[i].dir; } } return 0; } /* There are two directories in a framework that contain header files, Headers and PrivateHeaders. We search Headers first as it is more common to upgrade a header from PrivateHeaders to Headers and when that is done, the old one might hang around and be out of data, causing grief. */ struct framework_header {const char * dirName; int dirNameLen; }; static struct framework_header framework_header_dirs[] = { { "Headers", 7 }, { "PrivateHeaders", 14 }, { NULL, 0 } }; /* Returns a pointer to a malloced string that contains the real pathname to the file, given the base name and the name. */ static char * framework_construct_pathname (const char *fname, cpp_dir *dir) { char *buf; size_t fname_len, frname_len; cpp_dir *fast_dir; char *frname; struct stat st; int i; /* Framework names must have a / in them. */ buf = strchr (fname, '/'); if (buf) fname_len = buf - fname; else return 0; fast_dir = find_framework (fname, fname_len); /* Framework includes must all come from one framework. */ if (fast_dir && dir != fast_dir) return 0; frname = XNEWVEC (char, strlen (fname) + dir->len + 2 + strlen(".framework/") + strlen("PrivateHeaders")); strncpy (&frname[0], dir->name, dir->len); frname_len = dir->len; if (frname_len && frname[frname_len-1] != '/') frname[frname_len++] = '/'; strncpy (&frname[frname_len], fname, fname_len); frname_len += fname_len; strncpy (&frname[frname_len], ".framework/", strlen (".framework/")); frname_len += strlen (".framework/"); if (fast_dir == 0) { frname[frname_len-1] = 0; if (stat (frname, &st) == 0) { /* As soon as we find the first instance of the framework, we stop and never use any later instance of that framework. */ add_framework (fname, fname_len, dir); } else { /* If we can't find the parent directory, no point looking further. */ free (frname); return 0; } frname[frname_len-1] = '/'; } /* Append framework_header_dirs and header file name */ for (i = 0; framework_header_dirs[i].dirName; i++) { strncpy (&frname[frname_len], framework_header_dirs[i].dirName, framework_header_dirs[i].dirNameLen); strcpy (&frname[frname_len + framework_header_dirs[i].dirNameLen], &fname[fname_len]); if (stat (frname, &st) == 0) return frname; } free (frname); return 0; } /* Search for FNAME in sub-frameworks. pname is the context that we wish to search in. Return the path the file was found at, otherwise return 0. */ static const char* find_subframework_file (const char *fname, const char *pname) { char *sfrname; const char *dot_framework = ".framework/"; char *bufptr; int sfrname_len, i, fname_len; struct cpp_dir *fast_dir; static struct cpp_dir subframe_dir; struct stat st; bufptr = strchr (fname, '/'); /* Subframework files must have / in the name. */ if (bufptr == 0) return 0; fname_len = bufptr - fname; fast_dir = find_framework (fname, fname_len); /* Sub framework header filename includes parent framework name and header name in the "CarbonCore/OSUtils.h" form. If it does not include slash it is not a sub framework include. */ bufptr = strstr (pname, dot_framework); /* If the parent header is not of any framework, then this header cannot be part of any subframework. */ if (!bufptr) return 0; /* Now translate. For example, +- bufptr fname = CarbonCore/OSUtils.h | pname = /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h into sfrname = /System/Library/Frameworks/Foundation.framework/Frameworks/CarbonCore.framework/Headers/OSUtils.h */ sfrname = XNEWVEC (char, strlen (pname) + strlen (fname) + 2 + strlen ("Frameworks/") + strlen (".framework/") + strlen ("PrivateHeaders")); bufptr += strlen (dot_framework); sfrname_len = bufptr - pname; strncpy (&sfrname[0], pname, sfrname_len); strncpy (&sfrname[sfrname_len], "Frameworks/", strlen ("Frameworks/")); sfrname_len += strlen("Frameworks/"); strncpy (&sfrname[sfrname_len], fname, fname_len); sfrname_len += fname_len; strncpy (&sfrname[sfrname_len], ".framework/", strlen (".framework/")); sfrname_len += strlen (".framework/"); /* Append framework_header_dirs and header file name */ for (i = 0; framework_header_dirs[i].dirName; i++) { strncpy (&sfrname[sfrname_len], framework_header_dirs[i].dirName, framework_header_dirs[i].dirNameLen); strcpy (&sfrname[sfrname_len + framework_header_dirs[i].dirNameLen], &fname[fname_len]); if (stat (sfrname, &st) == 0) { if (fast_dir != &subframe_dir) { if (fast_dir) warning (0, "subframework include %s conflicts with framework include", fname); else add_framework (fname, fname_len, &subframe_dir); } return sfrname; } } free (sfrname); return 0; } /* Add PATH to the system includes. PATH must be malloc-ed and NUL-terminated. System framework paths are C++ aware. */ static void add_system_framework_path (char *path) { int cxx_aware = 1; cpp_dir *p; p = XNEW (cpp_dir); p->next = NULL; p->name = path; p->sysp = 1 + !cxx_aware; p->construct = framework_construct_pathname; using_frameworks = 1; add_cpp_dir_path (p, SYSTEM); } /* Add PATH to the bracket includes. PATH must be malloc-ed and NUL-terminated. */ void add_framework_path (char *path) { cpp_dir *p; p = XNEW (cpp_dir); p->next = NULL; p->name = path; p->sysp = 0; p->construct = framework_construct_pathname; using_frameworks = 1; add_cpp_dir_path (p, BRACKET); } static const char *framework_defaults [] = { "/System/Library/Frameworks", "/Library/Frameworks", }; /* Register the GNU objective-C runtime include path if STDINC. */ void darwin_register_objc_includes (const char *sysroot, const char *iprefix, int stdinc) { const char *fname; size_t len; /* We do not do anything if we do not want the standard includes. */ if (!stdinc) return; fname = GCC_INCLUDE_DIR "-gnu-runtime"; /* Register the GNU OBJC runtime include path if we are compiling OBJC with GNU-runtime. */ if (c_dialect_objc () && !flag_next_runtime) { char *str; /* See if our directory starts with the standard prefix. "Translate" them, i.e. replace /usr/local/lib/gcc... with IPREFIX and search them first. */ if (iprefix && (len = cpp_GCC_INCLUDE_DIR_len) != 0 && !sysroot && !strncmp (fname, cpp_GCC_INCLUDE_DIR, len)) { str = concat (iprefix, fname + len, NULL); /* FIXME: wrap the headers for C++awareness. */ add_path (str, SYSTEM, /*c++aware=*/false, false); } /* Should this directory start with the sysroot? */ if (sysroot) str = concat (sysroot, fname, NULL); else str = update_path (fname, ""); add_path (str, SYSTEM, /*c++aware=*/false, false); } } /* Register all the system framework paths if STDINC is true and setup the missing_header callback for subframework searching if any frameworks had been registered. */ void darwin_register_frameworks (const char *sysroot, const char *iprefix ATTRIBUTE_UNUSED, int stdinc) { if (stdinc) { size_t i; /* Setup default search path for frameworks. */ for (i=0; i<sizeof (framework_defaults)/sizeof(const char *); ++i) { char *str; if (sysroot) str = concat (sysroot, xstrdup (framework_defaults [i]), NULL); else str = xstrdup (framework_defaults[i]); /* System Framework headers are cxx aware. */ add_system_framework_path (str); } } if (using_frameworks) cpp_get_callbacks (parse_in)->missing_header = find_subframework_header; } /* Search for HEADER in context dependent way. The return value is the malloced name of a header to try and open, if any, or NULL otherwise. This is called after normal header lookup processing fails to find a header. We search each file in the include stack, using FUNC, starting from the most deeply nested include and finishing with the main input file. We stop searching when FUNC returns nonzero. */ static const char* find_subframework_header (cpp_reader *pfile, const char *header, cpp_dir **dirp) { const char *fname = header; struct cpp_buffer *b; const char *n; for (b = cpp_get_buffer (pfile); b && cpp_get_file (b) && cpp_get_path (cpp_get_file (b)); b = cpp_get_prev (b)) { n = find_subframework_file (fname, cpp_get_path (cpp_get_file (b))); if (n) { /* Logically, the place where we found the subframework is the place where we found the Framework that contains the subframework. This is useful for tracking wether or not we are in a system header. */ *dirp = cpp_get_dir (cpp_get_file (b)); return n; } } return 0; } /* Return the value of darwin_macosx_version_min suitable for the __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ macro, so '10.4.2' becomes 1040. The lowest digit is always zero. Print a warning if the version number can't be understood. */ static const char * version_as_macro (void) { static char result[] = "1000"; if (strncmp (darwin_macosx_version_min, "10.", 3) != 0) goto fail; if (! ISDIGIT (darwin_macosx_version_min[3])) goto fail; result[2] = darwin_macosx_version_min[3]; if (darwin_macosx_version_min[4] != '\0' && darwin_macosx_version_min[4] != '.') goto fail; return result; fail: error ("Unknown value %qs of -mmacosx-version-min", darwin_macosx_version_min); return "1000"; } /* Define additional CPP flags for Darwin. */ #define builtin_define(TXT) cpp_define (pfile, TXT) void darwin_cpp_builtins (cpp_reader *pfile) { builtin_define ("__MACH__"); builtin_define ("__APPLE__"); /* __APPLE_CC__ is defined as some old Apple include files expect it to be defined and won't work if it isn't. */ builtin_define_with_value ("__APPLE_CC__", "1", false); builtin_define_with_value ("__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__", version_as_macro(), false); } /* Handle C family front-end options. */ static bool handle_c_option (size_t code, const char *arg, int value ATTRIBUTE_UNUSED) { switch (code) { default: /* Unrecognized options that we said we'd handle turn into errors if not listed here. */ return false; case OPT_iframework: add_system_framework_path (xstrdup (arg)); break; case OPT_fapple_kext: ; } /* We recognized the option. */ return true; } #undef TARGET_HANDLE_C_OPTION #define TARGET_HANDLE_C_OPTION handle_c_option struct gcc_targetcm targetcm = TARGETCM_INITIALIZER;
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