| /* 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; |