1 /* Darwin support needed only by C/C++ frontends.
2 Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008, 2010
3 Free Software Foundation, Inc.
4 Contributed by Apple Computer Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "c-family/c-common.h"
30 #include "c-family/c-pragma.h"
31 #include "c-family/c-format.h"
32 #include "diagnostic-core.h"
36 #include "cppdefault.h"
39 #include "target-def.h"
43 #define BAD(gmsgid) do { warning (OPT_Wpragmas, gmsgid); return; } while (0)
44 #define BAD2(msgid, arg) do { warning (OPT_Wpragmas, msgid, arg); return; } while (0)
46 static bool using_frameworks = false;
48 static const char *find_subframework_header (cpp_reader *pfile, const char *header,
51 typedef struct align_stack
54 struct align_stack * prev;
57 static struct align_stack * field_align_stack = NULL;
59 /* Maintain a small stack of alignments. This is similar to pragma
60 pack's stack, but simpler. */
63 push_field_alignment (int bit_alignment)
65 align_stack *entry = XNEW (align_stack);
67 entry->alignment = maximum_field_alignment;
68 entry->prev = field_align_stack;
69 field_align_stack = entry;
71 maximum_field_alignment = bit_alignment;
75 pop_field_alignment (void)
77 if (field_align_stack)
79 align_stack *entry = field_align_stack;
81 maximum_field_alignment = entry->alignment;
82 field_align_stack = entry->prev;
86 error ("too many #pragma options align=reset");
89 /* Handlers for Darwin-specific pragmas. */
92 darwin_pragma_ignore (cpp_reader *pfile ATTRIBUTE_UNUSED)
97 /* #pragma options align={mac68k|power|reset} */
100 darwin_pragma_options (cpp_reader *pfile ATTRIBUTE_UNUSED)
105 if (pragma_lex (&t) != CPP_NAME)
106 BAD ("malformed '#pragma options', ignoring");
107 arg = IDENTIFIER_POINTER (t);
108 if (strcmp (arg, "align"))
109 BAD ("malformed '#pragma options', ignoring");
110 if (pragma_lex (&t) != CPP_EQ)
111 BAD ("malformed '#pragma options', ignoring");
112 if (pragma_lex (&t) != CPP_NAME)
113 BAD ("malformed '#pragma options', ignoring");
115 if (pragma_lex (&x) != CPP_EOF)
116 warning (OPT_Wpragmas, "junk at end of '#pragma options'");
118 arg = IDENTIFIER_POINTER (t);
119 if (!strcmp (arg, "mac68k"))
120 push_field_alignment (16);
121 else if (!strcmp (arg, "power"))
122 push_field_alignment (0);
123 else if (!strcmp (arg, "reset"))
124 pop_field_alignment ();
126 BAD ("malformed '#pragma options align={mac68k|power|reset}', ignoring");
129 /* #pragma unused ([var {, var}*]) */
132 darwin_pragma_unused (cpp_reader *pfile ATTRIBUTE_UNUSED)
137 if (pragma_lex (&x) != CPP_OPEN_PAREN)
138 BAD ("missing '(' after '#pragma unused', ignoring");
142 tok = pragma_lex (&decl);
143 if (tok == CPP_NAME && decl)
145 tree local = lookup_name (decl);
146 if (local && (TREE_CODE (local) == PARM_DECL
147 || TREE_CODE (local) == VAR_DECL))
149 TREE_USED (local) = 1;
150 DECL_READ_P (local) = 1;
152 tok = pragma_lex (&x);
153 if (tok != CPP_COMMA)
158 if (tok != CPP_CLOSE_PAREN)
159 BAD ("missing ')' after '#pragma unused', ignoring");
161 if (pragma_lex (&x) != CPP_EOF)
162 BAD ("junk at end of '#pragma unused'");
165 /* Parse the ms_struct pragma. */
167 darwin_pragma_ms_struct (cpp_reader *pfile ATTRIBUTE_UNUSED)
172 if (pragma_lex (&t) != CPP_NAME)
173 BAD ("malformed '#pragma ms_struct', ignoring");
174 arg = IDENTIFIER_POINTER (t);
176 if (!strcmp (arg, "on"))
177 darwin_ms_struct = true;
178 else if (!strcmp (arg, "off") || !strcmp (arg, "reset"))
179 darwin_ms_struct = false;
181 BAD ("malformed '#pragma ms_struct {on|off|reset}', ignoring");
183 if (pragma_lex (&t) != CPP_EOF)
184 BAD ("junk at end of '#pragma ms_struct'");
187 static struct frameworks_in_use {
191 } *frameworks_in_use;
192 static int num_frameworks = 0;
193 static int max_frameworks = 0;
196 /* Remember which frameworks have been seen, so that we can ensure
197 that all uses of that framework come from the same framework. DIR
198 is the place where the named framework NAME, which is of length
199 LEN, was found. We copy the directory name from NAME, as it will be
203 add_framework (const char *name, size_t len, cpp_dir *dir)
207 for (i = 0; i < num_frameworks; ++i)
209 if (len == frameworks_in_use[i].len
210 && strncmp (name, frameworks_in_use[i].name, len) == 0)
215 if (i >= max_frameworks)
217 max_frameworks = i*2;
218 max_frameworks += i == 0;
219 frameworks_in_use = XRESIZEVEC (struct frameworks_in_use,
220 frameworks_in_use, max_frameworks);
222 dir_name = XNEWVEC (char, len + 1);
223 memcpy (dir_name, name, len);
224 dir_name[len] = '\0';
225 frameworks_in_use[num_frameworks].name = dir_name;
226 frameworks_in_use[num_frameworks].len = len;
227 frameworks_in_use[num_frameworks].dir = dir;
231 /* Recall if we have seen the named framework NAME, before, and where
232 we saw it. NAME is LEN bytes long. The return value is the place
233 where it was seen before. */
235 static struct cpp_dir*
236 find_framework (const char *name, size_t len)
239 for (i = 0; i < num_frameworks; ++i)
241 if (len == frameworks_in_use[i].len
242 && strncmp (name, frameworks_in_use[i].name, len) == 0)
244 return frameworks_in_use[i].dir;
250 /* There are two directories in a framework that contain header files,
251 Headers and PrivateHeaders. We search Headers first as it is more
252 common to upgrade a header from PrivateHeaders to Headers and when
253 that is done, the old one might hang around and be out of data,
256 struct framework_header {const char * dirName; int dirNameLen; };
257 static struct framework_header framework_header_dirs[] = {
259 { "PrivateHeaders", 14 },
263 /* Returns a pointer to a malloced string that contains the real pathname
264 to the file, given the base name and the name. */
267 framework_construct_pathname (const char *fname, cpp_dir *dir)
270 size_t fname_len, frname_len;
276 /* Framework names must have a / in them. */
277 buf = strchr (fname, '/');
279 fname_len = buf - fname;
283 fast_dir = find_framework (fname, fname_len);
285 /* Framework includes must all come from one framework. */
286 if (fast_dir && dir != fast_dir)
289 frname = XNEWVEC (char, strlen (fname) + dir->len + 2
290 + strlen(".framework/") + strlen("PrivateHeaders"));
291 strncpy (&frname[0], dir->name, dir->len);
292 frname_len = dir->len;
293 if (frname_len && frname[frname_len-1] != '/')
294 frname[frname_len++] = '/';
295 strncpy (&frname[frname_len], fname, fname_len);
296 frname_len += fname_len;
297 strncpy (&frname[frname_len], ".framework/", strlen (".framework/"));
298 frname_len += strlen (".framework/");
302 frname[frname_len-1] = 0;
303 if (stat (frname, &st) == 0)
305 /* As soon as we find the first instance of the framework,
306 we stop and never use any later instance of that
308 add_framework (fname, fname_len, dir);
312 /* If we can't find the parent directory, no point looking
317 frname[frname_len-1] = '/';
320 /* Append framework_header_dirs and header file name */
321 for (i = 0; framework_header_dirs[i].dirName; i++)
323 strncpy (&frname[frname_len],
324 framework_header_dirs[i].dirName,
325 framework_header_dirs[i].dirNameLen);
326 strcpy (&frname[frname_len + framework_header_dirs[i].dirNameLen],
329 if (stat (frname, &st) == 0)
337 /* Search for FNAME in sub-frameworks. pname is the context that we
338 wish to search in. Return the path the file was found at,
339 otherwise return 0. */
342 find_subframework_file (const char *fname, const char *pname)
345 const char *dot_framework = ".framework/";
347 int sfrname_len, i, fname_len;
348 struct cpp_dir *fast_dir;
349 static struct cpp_dir subframe_dir;
352 bufptr = strchr (fname, '/');
354 /* Subframework files must have / in the name. */
358 fname_len = bufptr - fname;
359 fast_dir = find_framework (fname, fname_len);
361 /* Sub framework header filename includes parent framework name and
362 header name in the "CarbonCore/OSUtils.h" form. If it does not
363 include slash it is not a sub framework include. */
364 bufptr = strstr (pname, dot_framework);
366 /* If the parent header is not of any framework, then this header
367 cannot be part of any subframework. */
371 /* Now translate. For example, +- bufptr
372 fname = CarbonCore/OSUtils.h |
373 pname = /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h
375 sfrname = /System/Library/Frameworks/Foundation.framework/Frameworks/CarbonCore.framework/Headers/OSUtils.h */
377 sfrname = XNEWVEC (char, strlen (pname) + strlen (fname) + 2 +
378 strlen ("Frameworks/") + strlen (".framework/")
379 + strlen ("PrivateHeaders"));
381 bufptr += strlen (dot_framework);
383 sfrname_len = bufptr - pname;
385 strncpy (&sfrname[0], pname, sfrname_len);
387 strncpy (&sfrname[sfrname_len], "Frameworks/", strlen ("Frameworks/"));
388 sfrname_len += strlen("Frameworks/");
390 strncpy (&sfrname[sfrname_len], fname, fname_len);
391 sfrname_len += fname_len;
393 strncpy (&sfrname[sfrname_len], ".framework/", strlen (".framework/"));
394 sfrname_len += strlen (".framework/");
396 /* Append framework_header_dirs and header file name */
397 for (i = 0; framework_header_dirs[i].dirName; i++)
399 strncpy (&sfrname[sfrname_len],
400 framework_header_dirs[i].dirName,
401 framework_header_dirs[i].dirNameLen);
402 strcpy (&sfrname[sfrname_len + framework_header_dirs[i].dirNameLen],
405 if (stat (sfrname, &st) == 0)
407 if (fast_dir != &subframe_dir)
410 warning (0, "subframework include %s conflicts with framework include",
413 add_framework (fname, fname_len, &subframe_dir);
424 /* Add PATH to the system includes. PATH must be malloc-ed and
425 NUL-terminated. System framework paths are C++ aware. */
428 add_system_framework_path (char *path)
436 p->sysp = 1 + !cxx_aware;
437 p->construct = framework_construct_pathname;
438 using_frameworks = 1;
440 add_cpp_dir_path (p, SYSTEM);
443 /* Add PATH to the bracket includes. PATH must be malloc-ed and
447 add_framework_path (char *path)
455 p->construct = framework_construct_pathname;
456 using_frameworks = 1;
458 add_cpp_dir_path (p, BRACKET);
461 static const char *framework_defaults [] =
463 "/System/Library/Frameworks",
464 "/Library/Frameworks",
467 /* Register the GNU objective-C runtime include path if STDINC. */
470 darwin_register_objc_includes (const char *sysroot, const char *iprefix,
475 /* We do not do anything if we do not want the standard includes. */
479 fname = GCC_INCLUDE_DIR "-gnu-runtime";
481 /* Register the GNU OBJC runtime include path if we are compiling OBJC
484 if (c_dialect_objc () && !flag_next_runtime)
487 /* See if our directory starts with the standard prefix.
488 "Translate" them, i.e. replace /usr/local/lib/gcc... with
489 IPREFIX and search them first. */
490 if (iprefix && (len = cpp_GCC_INCLUDE_DIR_len) != 0 && !sysroot
491 && !strncmp (fname, cpp_GCC_INCLUDE_DIR, len))
493 str = concat (iprefix, fname + len, NULL);
494 /* FIXME: wrap the headers for C++awareness. */
495 add_path (str, SYSTEM, /*c++aware=*/false, false);
498 /* Should this directory start with the sysroot? */
500 str = concat (sysroot, fname, NULL);
502 str = update_path (fname, "");
504 add_path (str, SYSTEM, /*c++aware=*/false, false);
509 /* Register all the system framework paths if STDINC is true and setup
510 the missing_header callback for subframework searching if any
511 frameworks had been registered. */
514 darwin_register_frameworks (const char *sysroot,
515 const char *iprefix ATTRIBUTE_UNUSED, int stdinc)
521 /* Setup default search path for frameworks. */
522 for (i=0; i<sizeof (framework_defaults)/sizeof(const char *); ++i)
526 str = concat (sysroot, xstrdup (framework_defaults [i]), NULL);
528 str = xstrdup (framework_defaults[i]);
529 /* System Framework headers are cxx aware. */
530 add_system_framework_path (str);
534 if (using_frameworks)
535 cpp_get_callbacks (parse_in)->missing_header = find_subframework_header;
538 /* Search for HEADER in context dependent way. The return value is
539 the malloced name of a header to try and open, if any, or NULL
540 otherwise. This is called after normal header lookup processing
541 fails to find a header. We search each file in the include stack,
542 using FUNC, starting from the most deeply nested include and
543 finishing with the main input file. We stop searching when FUNC
547 find_subframework_header (cpp_reader *pfile, const char *header, cpp_dir **dirp)
549 const char *fname = header;
550 struct cpp_buffer *b;
553 for (b = cpp_get_buffer (pfile);
554 b && cpp_get_file (b) && cpp_get_path (cpp_get_file (b));
555 b = cpp_get_prev (b))
557 n = find_subframework_file (fname, cpp_get_path (cpp_get_file (b)));
560 /* Logically, the place where we found the subframework is
561 the place where we found the Framework that contains the
562 subframework. This is useful for tracking wether or not
563 we are in a system header. */
564 *dirp = cpp_get_dir (cpp_get_file (b));
572 /* Return the value of darwin_macosx_version_min suitable for the
573 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ macro,
574 so '10.4.2' becomes 1040. The lowest digit is always zero.
575 Print a warning if the version number can't be understood. */
577 version_as_macro (void)
579 static char result[] = "1000";
581 if (strncmp (darwin_macosx_version_min, "10.", 3) != 0)
583 if (! ISDIGIT (darwin_macosx_version_min[3]))
585 result[2] = darwin_macosx_version_min[3];
586 if (darwin_macosx_version_min[4] != '\0'
587 && darwin_macosx_version_min[4] != '.')
593 error ("unknown value %qs of -mmacosx-version-min",
594 darwin_macosx_version_min);
598 /* Define additional CPP flags for Darwin. */
600 #define builtin_define(TXT) cpp_define (pfile, TXT)
603 darwin_cpp_builtins (cpp_reader *pfile)
605 builtin_define ("__MACH__");
606 builtin_define ("__APPLE__");
608 /* __APPLE_CC__ is defined as some old Apple include files expect it
609 to be defined and won't work if it isn't. */
610 builtin_define_with_value ("__APPLE_CC__", "1", false);
612 if (darwin_constant_cfstrings)
613 builtin_define ("__CONSTANT_CFSTRINGS__");
615 builtin_define_with_value ("__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__",
616 version_as_macro(), false);
618 /* Since we do not (at 4.6) support ObjC gc for the NeXT runtime, the
619 following will cause a syntax error if one tries to compile gc attributed
620 items. However, without this, NeXT system headers cannot be parsed
621 properly (on systems >= darwin 9). */
624 builtin_define ("__strong=__attribute__((objc_gc(strong)))");
625 builtin_define ("__weak=__attribute__((objc_gc(weak)))");
626 builtin_define ("__OBJC_GC__");
630 builtin_define ("__strong=");
631 builtin_define ("__weak=");
635 /* Handle C family front-end options. */
638 handle_c_option (size_t code,
640 int value ATTRIBUTE_UNUSED)
645 /* Unrecognized options that we said we'd handle turn into
646 errors if not listed here. */
650 add_system_framework_path (xstrdup (arg));
653 case OPT_fapple_kext:
657 /* We recognized the option. */
661 #undef TARGET_HANDLE_C_OPTION
662 #define TARGET_HANDLE_C_OPTION handle_c_option
664 struct gcc_targetcm targetcm = TARGETCM_INITIALIZER;
666 /* Allow ObjC* access to CFStrings. */
668 darwin_objc_construct_string (tree str)
670 if (!darwin_constant_cfstrings)
672 /* Even though we are not using CFStrings, place our literal
673 into the cfstring_htab hash table, so that the
674 darwin_constant_cfstring_p() function will see it. */
675 darwin_enter_string_into_cfstring_table (str);
676 /* Fall back to NSConstantString. */
680 return darwin_build_constant_cfstring (str);
683 /* The string ref type is created as CFStringRef by <CFBase.h> therefore, we
684 must match for it explicitly, since it's outside the gcc code. */
687 darwin_cfstring_ref_p (const_tree strp)
690 if (!strp || TREE_CODE (strp) != POINTER_TYPE)
693 tn = TYPE_NAME (strp);
697 && IDENTIFIER_POINTER (tn)
698 && !strncmp (IDENTIFIER_POINTER (tn), "CFStringRef", 8));
701 /* At present the behavior of this is undefined and it does nothing. */
703 darwin_check_cfstring_format_arg (tree ARG_UNUSED (format_arg),
704 tree ARG_UNUSED (args_list))
708 /* The extra format types we recognize. */
709 EXPORTED_CONST format_kind_info darwin_additional_format_types[] = {
710 { "CFString", NULL, NULL, NULL, NULL,
712 FMT_FLAG_ARG_CONVERT|FMT_FLAG_PARSE_ARG_CONVERT_EXTERNAL, 0, 0, 0, 0, 0, 0,