1 /* Collect static initialization info into data structures that can be
2 traversed by C++ initialization and finalization routines.
3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
6 Contributed by Chris Smith (csmith@convex.com).
7 Heavily modified by Michael Meissner (meissner@cygnus.com),
8 Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com).
10 This file is part of GCC.
12 GCC is free software; you can redistribute it and/or modify it under
13 the terms of the GNU General Public License as published by the Free
14 Software Foundation; either version 3, or (at your option) any later
17 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
18 WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 You should have received a copy of the GNU General Public License
23 along with GCC; see the file COPYING3. If not see
24 <http://www.gnu.org/licenses/>. */
27 /* Build tables of static constructors and destructors and run ld. */
31 #include "coretypes.h"
34 #if ! defined( SIGCHLD ) && defined( SIGCLD )
35 # define SIGCHLD SIGCLD
38 #ifndef LIBRARY_PATH_ENV
39 #define LIBRARY_PATH_ENV "LIBRARY_PATH"
45 #include "collect2-aix.h"
51 /* On certain systems, we have code that works by scanning the object file
52 directly. But this code uses system-specific header files and library
53 functions, so turn it off in a cross-compiler. Likewise, the names of
54 the utilities are not correct for a cross-compiler; we have to hope that
55 cross-versions are in the proper directories. */
57 #ifdef CROSS_DIRECTORY_STRUCTURE
58 #ifndef CROSS_AIX_SUPPORT
59 #undef OBJECT_FORMAT_COFF
62 #undef REAL_LD_FILE_NAME
63 #undef REAL_NM_FILE_NAME
64 #undef REAL_STRIP_FILE_NAME
67 /* If we cannot use a special method, use the ordinary one:
68 run nm to find what symbols are present.
69 In a cross-compiler, this means you need a cross nm,
70 but that is not quite as unpleasant as special headers. */
72 #if !defined (OBJECT_FORMAT_COFF)
73 #define OBJECT_FORMAT_NONE
76 #ifdef OBJECT_FORMAT_COFF
78 #ifndef CROSS_DIRECTORY_STRUCTURE
86 /* Many versions of ldfcn.h define these. */
95 /* Some systems have an ISCOFF macro, but others do not. In some cases
96 the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines
97 that either do not have an ISCOFF macro in /usr/include or for those
101 #define MY_ISCOFF(X) ISCOFF (X)
104 #endif /* OBJECT_FORMAT_COFF */
106 #ifdef OBJECT_FORMAT_NONE
108 /* Default flags to pass to nm. */
110 #define NM_FLAGS "-n"
113 #endif /* OBJECT_FORMAT_NONE */
115 /* Some systems use __main in a way incompatible with its use in gcc, in these
116 cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
117 give the same symbol without quotes for an alternative entry point. */
119 #define NAME__MAIN "__main"
122 /* This must match tree.h. */
123 #define DEFAULT_INIT_PRIORITY 65535
125 #ifndef COLLECT_SHARED_INIT_FUNC
126 #define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
127 fprintf ((STREAM), "void _GLOBAL__DI() {\n\t%s();\n}\n", (FUNC))
129 #ifndef COLLECT_SHARED_FINI_FUNC
130 #define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
131 fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC))
135 #define SCAN_LIBRARIES
139 #define SHLIB_SUFFIX ".so"
143 int do_collecting = 1;
145 int do_collecting = 0;
148 /* Cook up an always defined indication of whether we proceed the
149 "EXPORT_LIST" way. */
151 #ifdef COLLECT_EXPORT_LIST
152 #define DO_COLLECT_EXPORT_LIST 1
154 #define DO_COLLECT_EXPORT_LIST 0
157 /* Nonzero if we should suppress the automatic demangling of identifiers
158 in linker error messages. Set from COLLECT_NO_DEMANGLE. */
161 /* Linked lists of constructor and destructor names. */
177 int vflag; /* true if -v */
178 static int rflag; /* true if -r */
179 static int strip_flag; /* true if -s */
180 static const char *demangle_flag;
181 #ifdef COLLECT_EXPORT_LIST
182 static int export_flag; /* true if -bE */
183 static int aix64_flag; /* true if -b64 */
184 static int aixrtl_flag; /* true if -brtl */
188 LTO_MODE_NONE, /* Not doing LTO. */
189 LTO_MODE_LTO, /* Normal LTO. */
190 LTO_MODE_WHOPR /* WHOPR. */
193 /* Current LTO mode. */
194 static enum lto_mode_d lto_mode = LTO_MODE_NONE;
196 int debug; /* true if -debug */
198 static int shared_obj; /* true if -shared */
200 static const char *c_file; /* <xxx>.c for constructor/destructor list. */
201 static const char *o_file; /* <xxx>.o for constructor/destructor list. */
202 #ifdef COLLECT_EXPORT_LIST
203 static const char *export_file; /* <xxx>.x for AIX export list. */
205 static char **lto_o_files; /* Output files for LTO. */
206 const char *ldout; /* File for ld stdout. */
207 const char *lderrout; /* File for ld stderr. */
208 static const char *output_file; /* Output file for ld. */
209 static const char *nm_file_name; /* pathname of nm */
211 static const char *ldd_file_name; /* pathname of ldd (or equivalent) */
213 static const char *strip_file_name; /* pathname of strip */
214 const char *c_file_name; /* pathname of gcc */
215 static char *initname, *fininame; /* names of init and fini funcs */
217 static struct head constructors; /* list of constructors found */
218 static struct head destructors; /* list of destructors found */
219 #ifdef COLLECT_EXPORT_LIST
220 static struct head exports; /* list of exported symbols */
222 static struct head frame_tables; /* list of frame unwind info tables */
224 static bool at_file_supplied; /* Whether to use @file arguments */
225 static char *response_file; /* Name of any current response file */
227 struct obstack temporary_obstack;
228 char * temporary_firstobj;
230 /* A string that must be prepended to a target OS path in order to find
231 it on the host system. */
232 #ifdef TARGET_SYSTEM_ROOT
233 static const char *target_system_root = TARGET_SYSTEM_ROOT;
235 static const char *target_system_root = "";
238 /* Structure to hold all the directories in which to search for files to
243 const char *prefix; /* String to prepend to the path. */
244 struct prefix_list *next; /* Next in linked list. */
249 struct prefix_list *plist; /* List of prefixes to try */
250 int max_len; /* Max length of a prefix in PLIST */
251 const char *name; /* Name of this list (used in config stuff) */
254 #ifdef COLLECT_EXPORT_LIST
255 /* Lists to keep libraries to be scanned for global constructors/destructors. */
256 static struct head libs; /* list of libraries */
257 static struct path_prefix cmdline_lib_dirs; /* directories specified with -L */
258 static struct path_prefix libpath_lib_dirs; /* directories in LIBPATH */
259 static struct path_prefix *libpaths[3] = {&cmdline_lib_dirs,
260 &libpath_lib_dirs, NULL};
263 /* List of names of object files containing LTO information.
264 These are a subset of the object file names appearing on the
265 command line, and must be identical, in the sense of pointer
266 equality, with the names passed to maybe_run_lto_and_relink(). */
270 const char *name; /* Name of object file. */
271 struct lto_object *next; /* Next in linked list. */
274 struct lto_object_list
276 struct lto_object *first; /* First list element. */
277 struct lto_object *last; /* Last list element. */
280 static struct lto_object_list lto_objects;
282 /* Special kinds of symbols that a name may denote. */
285 SYM_REGULAR = 0, /* nothing special */
287 SYM_CTOR = 1, /* constructor */
288 SYM_DTOR = 2, /* destructor */
289 SYM_INIT = 3, /* shared object routine that calls all the ctors */
290 SYM_FINI = 4, /* shared object routine that calls all the dtors */
291 SYM_DWEH = 5 /* DWARF exception handling table */
294 static symkind is_ctor_dtor (const char *);
296 static void handler (int);
297 static char *find_a_file (struct path_prefix *, const char *);
298 static void add_prefix (struct path_prefix *, const char *);
299 static void prefix_from_env (const char *, struct path_prefix *);
300 static void prefix_from_string (const char *, struct path_prefix *);
301 static void do_wait (const char *, struct pex_obj *);
302 static void fork_execute (const char *, char **);
303 static void maybe_unlink (const char *);
304 static void maybe_unlink_list (char **);
305 static void add_to_list (struct head *, const char *);
306 static int extract_init_priority (const char *);
307 static void sort_ids (struct head *);
308 static void write_list (FILE *, const char *, struct id *);
309 #ifdef COLLECT_EXPORT_LIST
310 static void dump_list (FILE *, const char *, struct id *);
313 static void dump_prefix_list (FILE *, const char *, struct prefix_list *);
315 static void write_list_with_asm (FILE *, const char *, struct id *);
316 static void write_c_file (FILE *, const char *);
317 static void write_c_file_stat (FILE *, const char *);
318 #ifndef LD_INIT_SWITCH
319 static void write_c_file_glob (FILE *, const char *);
321 #ifdef SCAN_LIBRARIES
322 static void scan_libraries (const char *);
324 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
325 static int is_in_args (const char *, const char **, const char **);
327 #ifdef COLLECT_EXPORT_LIST
329 static int is_in_list (const char *, struct id *);
331 static void write_aix_file (FILE *, struct id *);
332 static char *resolve_lib_name (const char *);
334 static char *extract_string (const char **);
336 /* Enumerations describing which pass this is for scanning the
340 PASS_FIRST, /* without constructors */
341 PASS_OBJ, /* individual objects */
342 PASS_LIB, /* looking for shared libraries */
343 PASS_SECOND, /* with constructors linked in */
344 PASS_LTOINFO /* looking for objects with LTO info */
347 /* ... and which kinds of symbols are to be considered. */
349 enum scanfilter_masks {
352 SCAN_CTOR = 1 << SYM_CTOR,
353 SCAN_DTOR = 1 << SYM_DTOR,
354 SCAN_INIT = 1 << SYM_INIT,
355 SCAN_FINI = 1 << SYM_FINI,
356 SCAN_DWEH = 1 << SYM_DWEH,
360 /* This type is used for parameters and variables which hold
361 combinations of the flags in enum scanfilter_masks. */
362 typedef int scanfilter;
364 /* Scan the name list of the loaded program for the symbols g++ uses for
365 static constructors and destructors.
367 The SCANPASS argument tells which collect processing pass this is for and
368 the SCANFILTER argument tells which kinds of symbols to consider in this
369 pass. Symbols of a special kind not in the filter mask are considered as
372 The constructor table begins at __CTOR_LIST__ and contains a count of the
373 number of pointers (or -1 if the constructors are built in a separate
374 section by the linker), followed by the pointers to the constructor
375 functions, terminated with a null pointer. The destructor table has the
376 same format, and begins at __DTOR_LIST__. */
378 static void scan_prog_file (const char *, scanpass, scanfilter);
381 /* Delete tempfiles and exit function. */
384 collect_exit (int status)
386 if (c_file != 0 && c_file[0])
387 maybe_unlink (c_file);
389 if (o_file != 0 && o_file[0])
390 maybe_unlink (o_file);
392 #ifdef COLLECT_EXPORT_LIST
393 if (export_file != 0 && export_file[0])
394 maybe_unlink (export_file);
398 maybe_unlink_list (lto_o_files);
400 if (ldout != 0 && ldout[0])
402 dump_file (ldout, stdout);
403 maybe_unlink (ldout);
406 if (lderrout != 0 && lderrout[0])
408 dump_file (lderrout, stderr);
409 maybe_unlink (lderrout);
412 if (status != 0 && output_file != 0 && output_file[0])
413 maybe_unlink (output_file);
416 maybe_unlink (response_file);
422 /* Notify user of a non-error. */
424 notice (const char *cmsgid, ...)
428 va_start (ap, cmsgid);
429 vfprintf (stderr, _(cmsgid), ap);
433 /* Die when sys call fails. */
436 fatal_perror (const char * cmsgid, ...)
441 va_start (ap, cmsgid);
442 fprintf (stderr, "collect2: ");
443 vfprintf (stderr, _(cmsgid), ap);
444 fprintf (stderr, ": %s\n", xstrerror (e));
447 collect_exit (FATAL_EXIT_CODE);
453 fatal (const char * cmsgid, ...)
457 va_start (ap, cmsgid);
458 fprintf (stderr, "collect2: ");
459 vfprintf (stderr, _(cmsgid), ap);
460 fprintf (stderr, "\n");
463 collect_exit (FATAL_EXIT_CODE);
466 /* Write error message. */
469 error (const char * gmsgid, ...)
473 va_start (ap, gmsgid);
474 fprintf (stderr, "collect2: ");
475 vfprintf (stderr, _(gmsgid), ap);
476 fprintf (stderr, "\n");
480 /* In case obstack is linked in, and abort is defined to fancy_abort,
481 provide a default entry. */
484 fancy_abort (const char *file, int line, const char *func)
486 fatal ("internal gcc abort in %s, at %s:%d", func, file, line);
492 if (c_file != 0 && c_file[0])
493 maybe_unlink (c_file);
495 if (o_file != 0 && o_file[0])
496 maybe_unlink (o_file);
498 if (ldout != 0 && ldout[0])
499 maybe_unlink (ldout);
501 if (lderrout != 0 && lderrout[0])
502 maybe_unlink (lderrout);
504 #ifdef COLLECT_EXPORT_LIST
505 if (export_file != 0 && export_file[0])
506 maybe_unlink (export_file);
510 maybe_unlink_list (lto_o_files);
513 maybe_unlink (response_file);
515 signal (signo, SIG_DFL);
521 file_exists (const char *name)
523 return access (name, R_OK) == 0;
526 /* Parse a reasonable subset of shell quoting syntax. */
529 extract_string (const char **pp)
542 obstack_1grow (&temporary_obstack, c);
543 else if (! inside && c == ' ')
545 else if (! inside && c == '\\')
550 obstack_1grow (&temporary_obstack, c);
553 obstack_1grow (&temporary_obstack, '\0');
555 return XOBFINISH (&temporary_obstack, char *);
559 dump_file (const char *name, FILE *to)
561 FILE *stream = fopen (name, "r");
568 while (c = getc (stream),
569 c != EOF && (ISIDNUM (c) || c == '$' || c == '.'))
570 obstack_1grow (&temporary_obstack, c);
571 if (obstack_object_size (&temporary_obstack) > 0)
573 const char *word, *p;
575 obstack_1grow (&temporary_obstack, '\0');
576 word = XOBFINISH (&temporary_obstack, const char *);
579 ++word, putc ('.', to);
581 if (!strncmp (p, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)))
582 p += strlen (USER_LABEL_PREFIX);
584 #ifdef HAVE_LD_DEMANGLE
590 result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE);
598 diff = strlen (word) - strlen (result);
599 while (diff > 0 && c == ' ')
600 --diff, putc (' ', to);
601 if (diff < 0 && c == ' ')
603 while (diff < 0 && c == ' ')
604 ++diff, c = getc (stream);
607 /* Make sure we output at least one space, or
608 the demangled symbol name will run into
609 whatever text follows. */
620 obstack_free (&temporary_obstack, temporary_firstobj);
629 /* Return the kind of symbol denoted by name S. */
632 is_ctor_dtor (const char *s)
634 struct names { const char *const name; const int len; symkind ret;
635 const int two_underscores; };
637 const struct names *p;
639 const char *orig_s = s;
641 static const struct names special[] = {
642 #ifndef NO_DOLLAR_IN_LABEL
643 { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, SYM_CTOR, 0 },
644 { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, SYM_DTOR, 0 },
646 #ifndef NO_DOT_IN_LABEL
647 { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, SYM_CTOR, 0 },
648 { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, SYM_DTOR, 0 },
649 #endif /* NO_DOT_IN_LABEL */
650 #endif /* NO_DOLLAR_IN_LABEL */
651 { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, SYM_CTOR, 0 },
652 { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, SYM_DTOR, 0 },
653 { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, SYM_DWEH, 0 },
654 { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, SYM_INIT, 0 },
655 { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, SYM_FINI, 0 },
656 { NULL, 0, SYM_REGULAR, 0 }
659 while ((ch = *s) == '_')
665 for (p = &special[0]; p->len > 0; p++)
668 && (!p->two_underscores || ((s - orig_s) >= 2))
669 && strncmp(s, p->name, p->len) == 0)
677 /* We maintain two prefix lists: one from COMPILER_PATH environment variable
678 and one from the PATH variable. */
680 static struct path_prefix cpath, path;
682 #ifdef CROSS_DIRECTORY_STRUCTURE
683 /* This is the name of the target machine. We use it to form the name
684 of the files to execute. */
686 static const char *const target_machine = TARGET_MACHINE;
689 /* Search for NAME using prefix list PPREFIX. We only look for executable
692 Return 0 if not found, otherwise return its name, allocated with malloc. */
695 find_a_file (struct path_prefix *pprefix, const char *name)
698 struct prefix_list *pl;
699 int len = pprefix->max_len + strlen (name) + 1;
702 fprintf (stderr, "Looking for '%s'\n", name);
704 #ifdef HOST_EXECUTABLE_SUFFIX
705 len += strlen (HOST_EXECUTABLE_SUFFIX);
708 temp = XNEWVEC (char, len);
710 /* Determine the filename to execute (special case for absolute paths). */
712 if (IS_ABSOLUTE_PATH (name))
714 if (access (name, X_OK) == 0)
719 fprintf (stderr, " - found: absolute path\n");
724 #ifdef HOST_EXECUTABLE_SUFFIX
725 /* Some systems have a suffix for executable files.
726 So try appending that. */
728 strcat (temp, HOST_EXECUTABLE_SUFFIX);
730 if (access (temp, X_OK) == 0)
735 fprintf (stderr, " - failed to locate using absolute path\n");
738 for (pl = pprefix->plist; pl; pl = pl->next)
742 strcpy (temp, pl->prefix);
745 if (stat (temp, &st) >= 0
746 && ! S_ISDIR (st.st_mode)
747 && access (temp, X_OK) == 0)
750 #ifdef HOST_EXECUTABLE_SUFFIX
751 /* Some systems have a suffix for executable files.
752 So try appending that. */
753 strcat (temp, HOST_EXECUTABLE_SUFFIX);
755 if (stat (temp, &st) >= 0
756 && ! S_ISDIR (st.st_mode)
757 && access (temp, X_OK) == 0)
762 if (debug && pprefix->plist == NULL)
763 fprintf (stderr, " - failed: no entries in prefix list\n");
769 /* Add an entry for PREFIX to prefix list PPREFIX. */
772 add_prefix (struct path_prefix *pprefix, const char *prefix)
774 struct prefix_list *pl, **prev;
779 for (pl = pprefix->plist; pl->next; pl = pl->next)
784 prev = &pprefix->plist;
786 /* Keep track of the longest prefix. */
788 len = strlen (prefix);
789 if (len > pprefix->max_len)
790 pprefix->max_len = len;
792 pl = XNEW (struct prefix_list);
793 pl->prefix = xstrdup (prefix);
798 pl->next = (struct prefix_list *) 0;
802 /* Take the value of the environment variable ENV, break it into a path, and
803 add of the entries to PPREFIX. */
806 prefix_from_env (const char *env, struct path_prefix *pprefix)
809 GET_ENVIRONMENT (p, env);
812 prefix_from_string (p, pprefix);
816 prefix_from_string (const char *p, struct path_prefix *pprefix)
818 const char *startp, *endp;
819 char *nstore = XNEWVEC (char, strlen (p) + 3);
822 fprintf (stderr, "Convert string '%s' into prefixes, separator = '%c'\n", p, PATH_SEPARATOR);
827 if (*endp == PATH_SEPARATOR || *endp == 0)
829 strncpy (nstore, startp, endp-startp);
832 strcpy (nstore, "./");
834 else if (! IS_DIR_SEPARATOR (endp[-1]))
836 nstore[endp-startp] = DIR_SEPARATOR;
837 nstore[endp-startp+1] = 0;
840 nstore[endp-startp] = 0;
843 fprintf (stderr, " - add prefix: %s\n", nstore);
845 add_prefix (pprefix, nstore);
848 endp = startp = endp + 1;
856 #ifdef OBJECT_FORMAT_NONE
858 /* Add an entry for the object file NAME to object file list LIST.
859 New entries are added at the end of the list. The original pointer
860 value of NAME is preserved, i.e., no string copy is performed. */
863 add_lto_object (struct lto_object_list *list, const char *name)
865 struct lto_object *n = XNEW (struct lto_object);
870 list->last->next = n;
876 #endif /* OBJECT_FORMAT_NONE */
879 /* Perform a link-time recompilation and relink if any of the object
880 files contain LTO info. The linker command line LTO_LD_ARGV
881 represents the linker command that would produce a final executable
882 without the use of LTO. OBJECT_LST is a vector of object file names
883 appearing in LTO_LD_ARGV that are to be considerd for link-time
884 recompilation, where OBJECT is a pointer to the last valid element.
885 (This awkward convention avoids an impedance mismatch with the
886 usage of similarly-named variables in main().) The elements of
887 OBJECT_LST must be identical, i.e., pointer equal, to the
888 corresponding arguments in LTO_LD_ARGV.
890 Upon entry, at least one linker run has been performed without the
891 use of any LTO info that might be present. Any recompilations
892 necessary for template instantiations have been performed, and
893 initializer/finalizer tables have been created if needed and
894 included in the linker command line LTO_LD_ARGV. If any of the
895 object files contain LTO info, we run the LTO back end on all such
896 files, and perform the final link with the LTO back end output
897 substituted for the LTO-optimized files. In some cases, a final
898 link with all link-time generated code has already been performed,
899 so there is no need to relink if no LTO info is found. In other
900 cases, our caller has not produced the final executable, and is
901 relying on us to perform the required link whether LTO info is
902 present or not. In that case, the FORCE argument should be true.
903 Note that the linker command line argument LTO_LD_ARGV passed into
904 this function may be modified in place. */
907 maybe_run_lto_and_relink (char **lto_ld_argv, char **object_lst,
908 const char **object, bool force)
910 const char **object_file = CONST_CAST2 (const char **, char **, object_lst);
912 int num_lto_c_args = 1; /* Allow space for the terminating NULL. */
914 while (object_file < object)
916 /* If file contains LTO info, add it to the list of LTO objects. */
917 scan_prog_file (*object_file++, PASS_LTOINFO, SCAN_ALL);
919 /* Increment the argument count by the number of object file arguments
920 we will add. An upper bound suffices, so just count all of the
921 object files regardless of whether they contain LTO info. */
925 if (lto_objects.first)
929 const char **lto_c_ptr;
931 const char **p, **q, **r;
932 const char **lto_o_ptr;
933 struct lto_object *list;
934 char *lto_wrapper = getenv ("COLLECT_LTO_WRAPPER");
936 const char *prog = "lto-wrapper";
939 fatal ("COLLECT_LTO_WRAPPER must be set.");
941 /* There is at least one object file containing LTO info,
942 so we need to run the LTO back end and relink. */
944 /* Get compiler options passed down from the parent `gcc' command.
945 These must be passed to the LTO back end. */
946 opts = getenv ("COLLECT_GCC_OPTIONS");
948 /* Increment the argument count by the number of inherited options.
949 Some arguments may be filtered out later. Again, an upper bound
956 extract_string (&cp);
959 obstack_free (&temporary_obstack, temporary_firstobj);
964 /* Increment the argument count by the number of initial
965 arguments added below. */
968 lto_c_argv = (char **) xcalloc (sizeof (char *), num_lto_c_args);
969 lto_c_ptr = CONST_CAST2 (const char **, char **, lto_c_argv);
971 *lto_c_ptr++ = lto_wrapper;
972 *lto_c_ptr++ = c_file_name;
978 const char *s = extract_string (&cp);
980 /* Pass the option or argument to the wrapper. */
981 *lto_c_ptr++ = xstrdup (s);
983 obstack_free (&temporary_obstack, temporary_firstobj);
986 *lto_c_ptr++ = xstrdup ("-debug");
988 /* Add LTO objects to the wrapper command line. */
989 for (list = lto_objects.first; list; list = list->next)
990 *lto_c_ptr++ = list->name;
994 /* Save intermediate WPA files in lto1 if debug. */
996 putenv (xstrdup ("WPA_SAVE_LTRANS=1"));
998 /* Run the LTO back end. */
999 pex = collect_execute (prog, lto_c_argv, NULL, NULL, PEX_SEARCH);
1003 size_t i, num_files;
1006 stream = pex_read_output (pex, 0);
1007 gcc_assert (stream);
1010 while ((c = getc (stream)) != EOF)
1012 obstack_1grow (&temporary_obstack, c);
1017 lto_o_files = XNEWVEC (char *, num_files + 1);
1018 lto_o_files[num_files] = NULL;
1019 start = XOBFINISH (&temporary_obstack, char *);
1020 for (i = 0; i < num_files; ++i)
1023 while (*end != '\n')
1027 lto_o_files[i] = xstrdup (start);
1032 obstack_free (&temporary_obstack, temporary_firstobj);
1034 do_wait (prog, pex);
1037 /* After running the LTO back end, we will relink, substituting
1038 the LTO output for the object files that we submitted to the
1039 LTO. Here, we modify the linker command line for the relink. */
1040 p = CONST_CAST2 (const char **, char **, lto_ld_argv);
1041 lto_o_ptr = CONST_CAST2 (const char **, char **, lto_o_files);
1045 for (list = lto_objects.first; list; list = list->next)
1047 if (*p == list->name) /* Note test for pointer equality! */
1049 /* Excise argument from linker command line. */
1052 /* Replace first argument with LTO output file. */
1053 *p++ = *lto_o_ptr++;
1057 /* Move following arguments one position earlier,
1058 overwriting the current argument. */
1066 /* No need to continue searching the LTO object list. */
1071 /* If we didn't find a match, move on to the next argument.
1072 Otherwise, P has been set to the correct argument position
1073 at which to continue. */
1077 /* The code above assumes we will never have more lto output files than
1078 input files. Otherwise, we need to resize lto_ld_argv. Check this
1081 fatal ("too many lto output files");
1083 /* Run the linker again, this time replacing the object files
1084 optimized by the LTO with the temporary file generated by the LTO. */
1085 fork_execute ("ld", lto_ld_argv);
1087 maybe_unlink_list (lto_o_files);
1091 /* Our caller is relying on us to do the link
1092 even though there is no LTO back end work to be done. */
1093 fork_execute ("ld", lto_ld_argv);
1100 main (int argc, char **argv)
1102 static const char *const ld_suffix = "ld";
1103 static const char *const plugin_ld_suffix = PLUGIN_LD;
1104 static const char *const real_ld_suffix = "real-ld";
1105 static const char *const collect_ld_suffix = "collect-ld";
1106 static const char *const nm_suffix = "nm";
1107 static const char *const gnm_suffix = "gnm";
1109 static const char *const ldd_suffix = LDD_SUFFIX;
1111 static const char *const strip_suffix = "strip";
1112 static const char *const gstrip_suffix = "gstrip";
1114 #ifdef CROSS_DIRECTORY_STRUCTURE
1115 /* If we look for a program in the compiler directories, we just use
1116 the short name, since these directories are already system-specific.
1117 But it we look for a program in the system directories, we need to
1118 qualify the program name with the target machine. */
1120 const char *const full_ld_suffix =
1121 concat(target_machine, "-", ld_suffix, NULL);
1122 const char *const full_plugin_ld_suffix =
1123 concat(target_machine, "-", plugin_ld_suffix, NULL);
1124 const char *const full_nm_suffix =
1125 concat (target_machine, "-", nm_suffix, NULL);
1126 const char *const full_gnm_suffix =
1127 concat (target_machine, "-", gnm_suffix, NULL);
1129 const char *const full_ldd_suffix =
1130 concat (target_machine, "-", ldd_suffix, NULL);
1132 const char *const full_strip_suffix =
1133 concat (target_machine, "-", strip_suffix, NULL);
1134 const char *const full_gstrip_suffix =
1135 concat (target_machine, "-", gstrip_suffix, NULL);
1137 const char *const full_ld_suffix = ld_suffix;
1138 const char *const full_plugin_ld_suffix = plugin_ld_suffix;
1139 const char *const full_nm_suffix = nm_suffix;
1140 const char *const full_gnm_suffix = gnm_suffix;
1142 const char *const full_ldd_suffix = ldd_suffix;
1144 const char *const full_strip_suffix = strip_suffix;
1145 const char *const full_gstrip_suffix = gstrip_suffix;
1146 #endif /* CROSS_DIRECTORY_STRUCTURE */
1150 #ifdef COLLECT_EXPORT_LIST
1153 const char *ld_file_name;
1159 bool use_plugin = false;
1161 /* The kinds of symbols we will have to consider when scanning the
1162 outcome of a first pass link. This is ALL to start with, then might
1163 be adjusted before getting to the first pass link per se, typically on
1164 AIX where we perform an early scan of objects and libraries to fetch
1165 the list of global ctors/dtors and make sure they are not garbage
1167 scanfilter ld1_filter = SCAN_ALL;
1172 const char **object;
1177 bool use_verbose = false;
1180 expandargv (&argc, &argv);
1181 if (argv != old_argv)
1182 at_file_supplied = 1;
1184 num_c_args = argc + 9;
1186 no_demangle = !! getenv ("COLLECT_NO_DEMANGLE");
1188 /* Suppress demangling by the real linker, which may be broken. */
1189 putenv (xstrdup ("COLLECT_NO_DEMANGLE="));
1191 #if defined (COLLECT2_HOST_INITIALIZATION)
1192 /* Perform system dependent initialization, if necessary. */
1193 COLLECT2_HOST_INITIALIZATION;
1197 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
1198 receive the signal. A different setting is inheritable */
1199 signal (SIGCHLD, SIG_DFL);
1202 /* Unlock the stdio streams. */
1203 unlock_std_streams ();
1205 gcc_init_libintl ();
1207 /* Do not invoke xcalloc before this point, since locale needs to be
1208 set first, in case a diagnostic is issued. */
1210 ld1_argv = XCNEWVEC (char *, argc + 4);
1211 ld1 = CONST_CAST2 (const char **, char **, ld1_argv);
1212 ld2_argv = XCNEWVEC (char *, argc + 11);
1213 ld2 = CONST_CAST2 (const char **, char **, ld2_argv);
1214 object_lst = XCNEWVEC (char *, argc);
1215 object = CONST_CAST2 (const char **, char **, object_lst);
1221 /* Parse command line early for instances of -debug. This allows
1222 the debug flag to be set before functions like find_a_file()
1223 are called. We also look for the -flto or -fwhopr flag to know
1224 what LTO mode we are in. */
1228 for (i = 1; argv[i] != NULL; i ++)
1230 if (! strcmp (argv[i], "-debug"))
1232 else if (! strcmp (argv[i], "-flto") && ! use_plugin)
1235 lto_mode = LTO_MODE_LTO;
1237 else if (! strcmp (argv[i], "-fwhopr") && ! use_plugin)
1240 lto_mode = LTO_MODE_WHOPR;
1242 else if (! strcmp (argv[i], "-plugin"))
1246 lto_mode = LTO_MODE_NONE;
1248 #ifdef COLLECT_EXPORT_LIST
1249 /* since -brtl, -bexport, -b64 are not position dependent
1250 also check for them here */
1251 if ((argv[i][0] == '-') && (argv[i][1] == 'b'))
1254 /* We want to disable automatic exports on AIX when user
1255 explicitly puts an export list in command line */
1256 if (arg[2] == 'E' || strncmp (&arg[2], "export", 6) == 0)
1258 else if (arg[2] == '6' && arg[3] == '4')
1260 else if (arg[2] == 'r' && arg[3] == 't' && arg[4] == 'l')
1268 #ifndef DEFAULT_A_OUT_NAME
1269 output_file = "a.out";
1271 output_file = DEFAULT_A_OUT_NAME;
1274 obstack_begin (&temporary_obstack, 0);
1275 temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0);
1277 #ifndef HAVE_LD_DEMANGLE
1278 current_demangling_style = auto_demangling;
1280 p = getenv ("COLLECT_GCC_OPTIONS");
1283 const char *q = extract_string (&p);
1284 if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
1287 obstack_free (&temporary_obstack, temporary_firstobj);
1289 /* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities
1290 -fno-exceptions -w -fno-whole-program */
1293 c_argv = XCNEWVEC (char *, num_c_args);
1294 c_ptr = CONST_CAST2 (const char **, char **, c_argv);
1297 fatal ("no arguments");
1300 if (signal (SIGQUIT, SIG_IGN) != SIG_IGN)
1301 signal (SIGQUIT, handler);
1303 if (signal (SIGINT, SIG_IGN) != SIG_IGN)
1304 signal (SIGINT, handler);
1306 if (signal (SIGALRM, SIG_IGN) != SIG_IGN)
1307 signal (SIGALRM, handler);
1310 if (signal (SIGHUP, SIG_IGN) != SIG_IGN)
1311 signal (SIGHUP, handler);
1313 if (signal (SIGSEGV, SIG_IGN) != SIG_IGN)
1314 signal (SIGSEGV, handler);
1316 if (signal (SIGBUS, SIG_IGN) != SIG_IGN)
1317 signal (SIGBUS, handler);
1320 /* Extract COMPILER_PATH and PATH into our prefix list. */
1321 prefix_from_env ("COMPILER_PATH", &cpath);
1322 prefix_from_env ("PATH", &path);
1324 /* Try to discover a valid linker/nm/strip to use. */
1326 /* Maybe we know the right file to use (if not cross). */
1328 #ifdef DEFAULT_LINKER
1329 if (access (DEFAULT_LINKER, X_OK) == 0)
1330 ld_file_name = DEFAULT_LINKER;
1331 if (ld_file_name == 0)
1333 #ifdef REAL_LD_FILE_NAME
1334 ld_file_name = find_a_file (&path, REAL_LD_FILE_NAME);
1335 if (ld_file_name == 0)
1337 /* Search the (target-specific) compiler dirs for ld'. */
1338 ld_file_name = find_a_file (&cpath, real_ld_suffix);
1339 /* Likewise for `collect-ld'. */
1340 if (ld_file_name == 0)
1341 ld_file_name = find_a_file (&cpath, collect_ld_suffix);
1342 /* Search the compiler directories for `ld'. We have protection against
1343 recursive calls in find_a_file. */
1344 if (ld_file_name == 0)
1345 ld_file_name = find_a_file (&cpath,
1349 /* Search the ordinary system bin directories
1350 for `ld' (if native linking) or `TARGET-ld' (if cross). */
1351 if (ld_file_name == 0)
1352 ld_file_name = find_a_file (&path,
1354 ? full_plugin_ld_suffix
1357 #ifdef REAL_NM_FILE_NAME
1358 nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME);
1359 if (nm_file_name == 0)
1361 nm_file_name = find_a_file (&cpath, gnm_suffix);
1362 if (nm_file_name == 0)
1363 nm_file_name = find_a_file (&path, full_gnm_suffix);
1364 if (nm_file_name == 0)
1365 nm_file_name = find_a_file (&cpath, nm_suffix);
1366 if (nm_file_name == 0)
1367 nm_file_name = find_a_file (&path, full_nm_suffix);
1370 ldd_file_name = find_a_file (&cpath, ldd_suffix);
1371 if (ldd_file_name == 0)
1372 ldd_file_name = find_a_file (&path, full_ldd_suffix);
1375 #ifdef REAL_STRIP_FILE_NAME
1376 strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME);
1377 if (strip_file_name == 0)
1379 strip_file_name = find_a_file (&cpath, gstrip_suffix);
1380 if (strip_file_name == 0)
1381 strip_file_name = find_a_file (&path, full_gstrip_suffix);
1382 if (strip_file_name == 0)
1383 strip_file_name = find_a_file (&cpath, strip_suffix);
1384 if (strip_file_name == 0)
1385 strip_file_name = find_a_file (&path, full_strip_suffix);
1387 /* Determine the full path name of the C compiler to use. */
1388 c_file_name = getenv ("COLLECT_GCC");
1389 if (c_file_name == 0)
1391 #ifdef CROSS_DIRECTORY_STRUCTURE
1392 c_file_name = concat (target_machine, "-gcc", NULL);
1394 c_file_name = "gcc";
1398 p = find_a_file (&cpath, c_file_name);
1400 /* Here it should be safe to use the system search path since we should have
1401 already qualified the name of the compiler when it is needed. */
1403 p = find_a_file (&path, c_file_name);
1408 *ld1++ = *ld2++ = ld_file_name;
1410 /* Make temp file names. */
1411 c_file = make_temp_file (".c");
1412 o_file = make_temp_file (".o");
1413 #ifdef COLLECT_EXPORT_LIST
1414 export_file = make_temp_file (".x");
1416 ldout = make_temp_file (".ld");
1417 lderrout = make_temp_file (".le");
1418 *c_ptr++ = c_file_name;
1425 #ifdef COLLECT_EXPORT_LIST
1426 /* Generate a list of directories from LIBPATH. */
1427 prefix_from_env ("LIBPATH", &libpath_lib_dirs);
1428 /* Add to this list also two standard directories where
1429 AIX loader always searches for libraries. */
1430 add_prefix (&libpath_lib_dirs, "/lib");
1431 add_prefix (&libpath_lib_dirs, "/usr/lib");
1434 /* Get any options that the upper GCC wants to pass to the sub-GCC.
1436 AIX support needs to know if -shared has been specified before
1437 parsing commandline arguments. */
1439 p = getenv ("COLLECT_GCC_OPTIONS");
1442 const char *q = extract_string (&p);
1443 if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
1444 *c_ptr++ = xstrdup (q);
1445 if (strcmp (q, "-EL") == 0 || strcmp (q, "-EB") == 0)
1446 *c_ptr++ = xstrdup (q);
1447 if (strcmp (q, "-shared") == 0)
1449 if (*q == '-' && q[1] == 'B')
1451 *c_ptr++ = xstrdup (q);
1454 q = extract_string (&p);
1455 *c_ptr++ = xstrdup (q);
1458 if (use_verbose && *q == '-' && q[1] == 'v' && q[2] == 0)
1460 /* Turn on trace in collect2 if needed. */
1464 obstack_free (&temporary_obstack, temporary_firstobj);
1465 *c_ptr++ = "-fno-profile-arcs";
1466 *c_ptr++ = "-fno-test-coverage";
1467 *c_ptr++ = "-fno-branch-probabilities";
1468 *c_ptr++ = "-fno-exceptions";
1470 *c_ptr++ = "-fno-whole-program";
1472 /* !!! When GCC calls collect2,
1473 it does not know whether it is calling collect2 or ld.
1474 So collect2 cannot meaningfully understand any options
1475 except those ld understands.
1476 If you propose to make GCC pass some other option,
1477 just imagine what will happen if ld is really ld!!! */
1479 /* Parse arguments. Remember output file spec, pass the rest to ld. */
1480 /* After the first file, put in the c++ rt0. */
1483 #ifdef HAVE_LD_DEMANGLE
1484 if (!demangle_flag && !no_demangle)
1485 demangle_flag = "--demangle";
1487 *ld1++ = *ld2++ = demangle_flag;
1489 while ((arg = *++argv) != (char *) 0)
1491 *ld1++ = *ld2++ = arg;
1498 if (!strcmp (arg, "-debug"))
1500 /* Already parsed. */
1504 if (!strcmp (arg, "-dynamic-linker") && argv[1])
1507 *ld1++ = *ld2++ = *argv;
1512 if (strcmp (arg, "-flto") == 0 || strcmp (arg, "-fwhopr") == 0)
1515 /* Do not pass LTO flag to the linker. */
1519 error ("LTO support has not been enabled in this "
1528 /* place o_file BEFORE this argument! */
1534 #ifdef COLLECT_EXPORT_LIST
1536 /* Resolving full library name. */
1537 const char *s = resolve_lib_name (arg+2);
1539 /* Saving a full library name. */
1540 add_to_list (&libs, s);
1545 #ifdef COLLECT_EXPORT_LIST
1546 /* Saving directories where to search for libraries. */
1548 add_prefix (&cmdline_lib_dirs, arg+2);
1551 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
1553 if (is_in_args (arg,
1554 CONST_CAST2 (const char **, char **, ld1_argv),
1558 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
1563 output_file = *ld1++ = *ld2++ = *++argv;
1565 #ifdef SWITCHES_NEED_SPACES
1566 && ! strchr (SWITCHES_NEED_SPACES, arg[1])
1570 output_file = &arg[2];
1579 if (arg[2] == '\0' && do_collecting)
1581 /* We must strip after the nm run, otherwise C++ linking
1582 will not work. Thus we strip in the second ld run, or
1583 else with strip if there is no second ld run. */
1595 if (strcmp (arg, "--no-demangle") == 0)
1597 demangle_flag = arg;
1602 else if (strncmp (arg, "--demangle", 10) == 0)
1604 demangle_flag = arg;
1606 #ifndef HAVE_LD_DEMANGLE
1609 enum demangling_styles style
1610 = cplus_demangle_name_to_style (arg+11);
1611 if (style == unknown_demangling)
1612 error ("unknown demangling style '%s'", arg+11);
1614 current_demangling_style = style;
1620 else if (strncmp (arg, "--sysroot=", 10) == 0)
1621 target_system_root = arg + 10;
1625 else if ((p = strrchr (arg, '.')) != (char *) 0
1626 && (strcmp (p, ".o") == 0 || strcmp (p, ".a") == 0
1627 || strcmp (p, ".so") == 0 || strcmp (p, ".lo") == 0
1628 || strcmp (p, ".obj") == 0))
1637 /* place o_file BEFORE this argument! */
1643 if (p[1] == 'o' || p[1] == 'l')
1645 #ifdef COLLECT_EXPORT_LIST
1646 /* libraries can be specified directly, i.e. without -l flag. */
1649 /* Saving a full library name. */
1650 add_to_list (&libs, arg);
1656 #ifdef COLLECT_EXPORT_LIST
1657 /* This is added only for debugging purposes. */
1660 fprintf (stderr, "List of libraries:\n");
1661 dump_list (stderr, "\t", libs.first);
1664 /* The AIX linker will discard static constructors in object files if
1665 nothing else in the file is referenced, so look at them first. Unless
1666 we are building a shared object, ignore the eh frame tables, as we
1667 would otherwise reference them all, hence drag all the corresponding
1668 objects even if nothing else is referenced. */
1670 const char **export_object_lst
1671 = CONST_CAST2 (const char **, char **, object_lst);
1673 struct id *list = libs.first;
1675 /* Compute the filter to use from the current one, do scan, then adjust
1676 the "current" filter to remove what we just included here. This will
1677 control whether we need a first pass link later on or not, and what
1678 will remain to be scanned there. */
1680 scanfilter this_filter
1681 = shared_obj ? ld1_filter : (ld1_filter & ~SCAN_DWEH);
1683 while (export_object_lst < object)
1684 scan_prog_file (*export_object_lst++, PASS_OBJ, this_filter);
1686 for (; list; list = list->next)
1687 scan_prog_file (list->name, PASS_FIRST, this_filter);
1689 ld1_filter = ld1_filter & ~this_filter;
1694 char *buf = concat ("-bE:", export_file, NULL);
1699 exportf = fopen (export_file, "w");
1700 if (exportf == (FILE *) 0)
1701 fatal_perror ("fopen %s", export_file);
1702 write_aix_file (exportf, exports.first);
1703 if (fclose (exportf))
1704 fatal_perror ("fclose %s", export_file);
1709 *c_ptr = *ld1 = *object = (char *) 0;
1713 notice ("collect2 version %s", version_string);
1714 #ifdef TARGET_VERSION
1717 fprintf (stderr, "\n");
1723 fprintf (stderr, "ld_file_name = %s\n",
1724 (ld_file_name ? ld_file_name : "not found"));
1725 fprintf (stderr, "c_file_name = %s\n",
1726 (c_file_name ? c_file_name : "not found"));
1727 fprintf (stderr, "nm_file_name = %s\n",
1728 (nm_file_name ? nm_file_name : "not found"));
1730 fprintf (stderr, "ldd_file_name = %s\n",
1731 (ldd_file_name ? ldd_file_name : "not found"));
1733 fprintf (stderr, "strip_file_name = %s\n",
1734 (strip_file_name ? strip_file_name : "not found"));
1735 fprintf (stderr, "c_file = %s\n",
1736 (c_file ? c_file : "not found"));
1737 fprintf (stderr, "o_file = %s\n",
1738 (o_file ? o_file : "not found"));
1740 ptr = getenv ("COLLECT_GCC_OPTIONS");
1742 fprintf (stderr, "COLLECT_GCC_OPTIONS = %s\n", ptr);
1744 ptr = getenv ("COLLECT_GCC");
1746 fprintf (stderr, "COLLECT_GCC = %s\n", ptr);
1748 ptr = getenv ("COMPILER_PATH");
1750 fprintf (stderr, "COMPILER_PATH = %s\n", ptr);
1752 ptr = getenv (LIBRARY_PATH_ENV);
1754 fprintf (stderr, "%-20s= %s\n", LIBRARY_PATH_ENV, ptr);
1756 fprintf (stderr, "\n");
1759 /* Load the program, searching all libraries and attempting to provide
1760 undefined symbols from repository information.
1762 If -r or they will be run via some other method, do not build the
1763 constructor or destructor list, just return now. */
1766 = rflag || (! DO_COLLECT_EXPORT_LIST && ! do_collecting);
1768 /* Perform the first pass link now, if we're about to exit or if we need
1769 to scan for things we haven't collected yet before pursuing further.
1771 On AIX, the latter typically includes nothing for shared objects or
1772 frame tables for an executable, out of what the required early scan on
1773 objects and libraries has performed above. In the !shared_obj case, we
1774 expect the relevant tables to be dragged together with their associated
1775 functions from precise cross reference insertions by the compiler. */
1777 if (early_exit || ld1_filter != SCAN_NOTHING)
1778 do_tlink (ld1_argv, object_lst);
1782 #ifdef COLLECT_EXPORT_LIST
1783 /* Make sure we delete the export file we may have created. */
1784 if (export_file != 0 && export_file[0])
1785 maybe_unlink (export_file);
1788 maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
1790 maybe_unlink (c_file);
1791 maybe_unlink (o_file);
1796 /* Unless we have done it all already, examine the namelist and search for
1797 static constructors and destructors to call. Write the constructor and
1798 destructor tables to a .s file and reload. */
1800 if (ld1_filter != SCAN_NOTHING)
1801 scan_prog_file (output_file, PASS_FIRST, ld1_filter);
1803 #ifdef SCAN_LIBRARIES
1804 scan_libraries (output_file);
1809 notice ("%d constructor(s) found\n", constructors.number);
1810 notice ("%d destructor(s) found\n", destructors.number);
1811 notice ("%d frame table(s) found\n", frame_tables.number);
1814 /* If the scan exposed nothing of special interest, there's no need to
1815 generate the glue code and relink so return now. */
1817 if (constructors.number == 0 && destructors.number == 0
1818 && frame_tables.number == 0
1819 #if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST)
1820 /* If we will be running these functions ourselves, we want to emit
1821 stubs into the shared library so that we do not have to relink
1822 dependent programs when we add static objects. */
1827 /* Do tlink without additional code generation now if we didn't
1828 do it earlier for scanning purposes. */
1829 if (ld1_filter == SCAN_NOTHING)
1830 do_tlink (ld1_argv, object_lst);
1833 maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
1835 /* Strip now if it was requested on the command line. */
1838 char **real_strip_argv = XCNEWVEC (char *, 3);
1839 const char ** strip_argv = CONST_CAST2 (const char **, char **,
1842 strip_argv[0] = strip_file_name;
1843 strip_argv[1] = output_file;
1844 strip_argv[2] = (char *) 0;
1845 fork_execute ("strip", real_strip_argv);
1848 #ifdef COLLECT_EXPORT_LIST
1849 maybe_unlink (export_file);
1851 maybe_unlink (c_file);
1852 maybe_unlink (o_file);
1856 /* Sort ctor and dtor lists by priority. */
1857 sort_ids (&constructors);
1858 sort_ids (&destructors);
1860 maybe_unlink(output_file);
1861 outf = fopen (c_file, "w");
1862 if (outf == (FILE *) 0)
1863 fatal_perror ("fopen %s", c_file);
1865 write_c_file (outf, c_file);
1868 fatal_perror ("fclose %s", c_file);
1870 /* Tell the linker that we have initializer and finalizer functions. */
1871 #ifdef LD_INIT_SWITCH
1872 #ifdef COLLECT_EXPORT_LIST
1873 *ld2++ = concat (LD_INIT_SWITCH, ":", initname, ":", fininame, NULL);
1875 *ld2++ = LD_INIT_SWITCH;
1877 *ld2++ = LD_FINI_SWITCH;
1882 #ifdef COLLECT_EXPORT_LIST
1885 /* If we did not add export flag to link arguments before, add it to
1886 second link phase now. No new exports should have been added. */
1887 if (! exports.first)
1888 *ld2++ = concat ("-bE:", export_file, NULL);
1890 #ifndef LD_INIT_SWITCH
1891 add_to_list (&exports, initname);
1892 add_to_list (&exports, fininame);
1893 add_to_list (&exports, "_GLOBAL__DI");
1894 add_to_list (&exports, "_GLOBAL__DD");
1896 exportf = fopen (export_file, "w");
1897 if (exportf == (FILE *) 0)
1898 fatal_perror ("fopen %s", export_file);
1899 write_aix_file (exportf, exports.first);
1900 if (fclose (exportf))
1901 fatal_perror ("fclose %s", export_file);
1905 /* End of arguments to second link phase. */
1910 fprintf (stderr, "\n========== output_file = %s, c_file = %s\n",
1911 output_file, c_file);
1912 write_c_file (stderr, "stderr");
1913 fprintf (stderr, "========== end of c_file\n\n");
1914 #ifdef COLLECT_EXPORT_LIST
1915 fprintf (stderr, "\n========== export_file = %s\n", export_file);
1916 write_aix_file (stderr, exports.first);
1917 fprintf (stderr, "========== end of export_file\n\n");
1921 /* Assemble the constructor and destructor tables.
1922 Link the tables in with the rest of the program. */
1924 fork_execute ("gcc", c_argv);
1925 #ifdef COLLECT_EXPORT_LIST
1926 /* On AIX we must call tlink because of possible templates resolution. */
1927 do_tlink (ld2_argv, object_lst);
1930 maybe_run_lto_and_relink (ld2_argv, object_lst, object, false);
1932 /* Otherwise, simply call ld because tlink is already done. */
1934 maybe_run_lto_and_relink (ld2_argv, object_lst, object, true);
1936 fork_execute ("ld", ld2_argv);
1938 /* Let scan_prog_file do any final mods (OSF/rose needs this for
1939 constructors/destructors in shared libraries. */
1940 scan_prog_file (output_file, PASS_SECOND, SCAN_ALL);
1943 maybe_unlink (c_file);
1944 maybe_unlink (o_file);
1946 #ifdef COLLECT_EXPORT_LIST
1947 maybe_unlink (export_file);
1954 /* Wait for a process to finish, and exit if a nonzero status is found. */
1957 collect_wait (const char *prog, struct pex_obj *pex)
1961 if (!pex_get_status (pex, 1, &status))
1962 fatal_perror ("can't get program status");
1967 if (WIFSIGNALED (status))
1969 int sig = WTERMSIG (status);
1970 error ("%s terminated with signal %d [%s]%s",
1971 prog, sig, strsignal(sig),
1972 WCOREDUMP(status) ? ", core dumped" : "");
1973 collect_exit (FATAL_EXIT_CODE);
1976 if (WIFEXITED (status))
1977 return WEXITSTATUS (status);
1983 do_wait (const char *prog, struct pex_obj *pex)
1985 int ret = collect_wait (prog, pex);
1988 error ("%s returned %d exit status", prog, ret);
1994 unlink (response_file);
1995 response_file = NULL;
2000 /* Execute a program, and wait for the reply. */
2003 collect_execute (const char *prog, char **argv, const char *outname,
2004 const char *errname, int flags)
2006 struct pex_obj *pex;
2009 char *response_arg = NULL;
2010 char *response_argv[3] ATTRIBUTE_UNUSED;
2012 if (HAVE_GNU_LD && at_file_supplied && argv[0] != NULL)
2014 /* If using @file arguments, create a temporary file and put the
2015 contents of argv into it. Then change argv to an array corresponding
2016 to a single argument @FILE, where FILE is the temporary filename. */
2018 char **current_argv = argv + 1;
2019 char *argv0 = argv[0];
2023 /* Note: we assume argv contains at least one element; this is
2026 response_file = make_temp_file ("");
2028 f = fopen (response_file, "w");
2031 fatal ("could not open response file %s", response_file);
2033 status = writeargv (current_argv, f);
2036 fatal ("could not write to response file %s", response_file);
2038 status = fclose (f);
2041 fatal ("could not close response file %s", response_file);
2043 response_arg = concat ("@", response_file, NULL);
2044 response_argv[0] = argv0;
2045 response_argv[1] = response_arg;
2046 response_argv[2] = NULL;
2048 argv = response_argv;
2057 fprintf (stderr, "%s", argv[0]);
2059 notice ("[cannot find %s]", prog);
2061 for (p_argv = &argv[1]; (str = *p_argv) != (char *) 0; p_argv++)
2062 fprintf (stderr, " %s", str);
2064 fprintf (stderr, "\n");
2070 /* If we cannot find a program we need, complain error. Do this here
2071 since we might not end up needing something that we could not find. */
2074 fatal ("cannot find '%s'", prog);
2076 pex = pex_init (0, "collect2", NULL);
2078 fatal_perror ("pex_init failed");
2080 errmsg = pex_run (pex, flags, argv[0], argv, outname,
2087 fatal_perror (errmsg);
2094 free (response_arg);
2100 fork_execute (const char *prog, char **argv)
2102 struct pex_obj *pex;
2104 pex = collect_execute (prog, argv, NULL, NULL, PEX_LAST | PEX_SEARCH);
2105 do_wait (prog, pex);
2108 /* Unlink a file unless we are debugging. */
2111 maybe_unlink (const char *file)
2114 unlink_if_ordinary (file);
2116 notice ("[Leaving %s]\n", file);
2119 /* Call maybe_unlink on the NULL-terminated list, FILE_LIST. */
2122 maybe_unlink_list (char **file_list)
2124 char **tmp = file_list;
2127 maybe_unlink (*(tmp++));
2131 static long sequence_number = 0;
2133 /* Add a name to a linked list. */
2136 add_to_list (struct head *head_ptr, const char *name)
2139 = (struct id *) xcalloc (sizeof (struct id) + strlen (name), 1);
2141 strcpy (newid->name, name);
2143 if (head_ptr->first)
2144 head_ptr->last->next = newid;
2146 head_ptr->first = newid;
2148 /* Check for duplicate symbols. */
2149 for (p = head_ptr->first;
2150 strcmp (name, p->name) != 0;
2155 head_ptr->last->next = 0;
2160 newid->sequence = ++sequence_number;
2161 head_ptr->last = newid;
2165 /* Grab the init priority number from an init function name that
2166 looks like "_GLOBAL_.I.12345.foo". */
2169 extract_init_priority (const char *name)
2173 while (name[pos] == '_')
2175 pos += 10; /* strlen ("GLOBAL__X_") */
2177 /* Extract init_p number from ctor/dtor name. */
2178 pri = atoi (name + pos);
2179 return pri ? pri : DEFAULT_INIT_PRIORITY;
2182 /* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order.
2183 ctors will be run from right to left, dtors from left to right. */
2186 sort_ids (struct head *head_ptr)
2188 /* id holds the current element to insert. id_next holds the next
2189 element to insert. id_ptr iterates through the already sorted elements
2190 looking for the place to insert id. */
2191 struct id *id, *id_next, **id_ptr;
2193 id = head_ptr->first;
2195 /* We don't have any sorted elements yet. */
2196 head_ptr->first = NULL;
2198 for (; id; id = id_next)
2201 id->sequence = extract_init_priority (id->name);
2203 for (id_ptr = &(head_ptr->first); ; id_ptr = &((*id_ptr)->next))
2205 /* If the sequence numbers are the same, we put the id from the
2206 file later on the command line later in the list. */
2207 || id->sequence > (*id_ptr)->sequence
2208 /* Hack: do lexical compare, too.
2209 || (id->sequence == (*id_ptr)->sequence
2210 && strcmp (id->name, (*id_ptr)->name) > 0) */
2219 /* Now set the sequence numbers properly so write_c_file works. */
2220 for (id = head_ptr->first; id; id = id->next)
2221 id->sequence = ++sequence_number;
2224 /* Write: `prefix', the names on list LIST, `suffix'. */
2227 write_list (FILE *stream, const char *prefix, struct id *list)
2231 fprintf (stream, "%sx%d,\n", prefix, list->sequence);
2236 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
2237 /* Given a STRING, return nonzero if it occurs in the list in range
2238 [ARGS_BEGIN,ARGS_END). */
2241 is_in_args (const char *string, const char **args_begin,
2242 const char **args_end)
2244 const char **args_pointer;
2245 for (args_pointer = args_begin; args_pointer != args_end; ++args_pointer)
2246 if (strcmp (string, *args_pointer) == 0)
2250 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
2252 #ifdef COLLECT_EXPORT_LIST
2253 /* This function is really used only on AIX, but may be useful. */
2256 is_in_list (const char *prefix, struct id *list)
2260 if (!strcmp (prefix, list->name)) return 1;
2266 #endif /* COLLECT_EXPORT_LIST */
2268 /* Added for debugging purpose. */
2269 #ifdef COLLECT_EXPORT_LIST
2271 dump_list (FILE *stream, const char *prefix, struct id *list)
2275 fprintf (stream, "%s%s,\n", prefix, list->name);
2283 dump_prefix_list (FILE *stream, const char *prefix, struct prefix_list *list)
2287 fprintf (stream, "%s%s,\n", prefix, list->prefix);
2294 write_list_with_asm (FILE *stream, const char *prefix, struct id *list)
2298 fprintf (stream, "%sx%d __asm__ (\"%s\");\n",
2299 prefix, list->sequence, list->name);
2304 /* Write out the constructor and destructor tables statically (for a shared
2305 object), along with the functions to execute them. */
2308 write_c_file_stat (FILE *stream, const char *name ATTRIBUTE_UNUSED)
2312 int frames = (frame_tables.number > 0);
2314 /* Figure out name of output_file, stripping off .so version. */
2315 p = strrchr (output_file, '/');
2331 if (strncmp (q, SHLIB_SUFFIX, strlen (SHLIB_SUFFIX)) == 0)
2333 q += strlen (SHLIB_SUFFIX);
2340 /* q points to null at end of the string (or . of the .so version) */
2341 prefix = XNEWVEC (char, q - p + 1);
2342 strncpy (prefix, p, q - p);
2344 for (r = prefix; *r; r++)
2345 if (!ISALNUM ((unsigned char)*r))
2348 notice ("\nwrite_c_file - output name is %s, prefix is %s\n",
2349 output_file, prefix);
2351 initname = concat ("_GLOBAL__FI_", prefix, NULL);
2352 fininame = concat ("_GLOBAL__FD_", prefix, NULL);
2356 /* Write the tables as C code. */
2358 fprintf (stream, "static int count;\n");
2359 fprintf (stream, "typedef void entry_pt();\n");
2360 write_list_with_asm (stream, "extern entry_pt ", constructors.first);
2364 write_list_with_asm (stream, "extern void *", frame_tables.first);
2366 fprintf (stream, "\tstatic void *frame_table[] = {\n");
2367 write_list (stream, "\t\t&", frame_tables.first);
2368 fprintf (stream, "\t0\n};\n");
2370 /* This must match what's in frame.h. */
2371 fprintf (stream, "struct object {\n");
2372 fprintf (stream, " void *pc_begin;\n");
2373 fprintf (stream, " void *pc_end;\n");
2374 fprintf (stream, " void *fde_begin;\n");
2375 fprintf (stream, " void *fde_array;\n");
2376 fprintf (stream, " __SIZE_TYPE__ count;\n");
2377 fprintf (stream, " struct object *next;\n");
2378 fprintf (stream, "};\n");
2380 fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
2381 fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
2383 fprintf (stream, "static void reg_frame () {\n");
2384 fprintf (stream, "\tstatic struct object ob;\n");
2385 fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
2386 fprintf (stream, "\t}\n");
2388 fprintf (stream, "static void dereg_frame () {\n");
2389 fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
2390 fprintf (stream, "\t}\n");
2393 fprintf (stream, "void %s() {\n", initname);
2394 if (constructors.number > 0 || frames)
2396 fprintf (stream, "\tstatic entry_pt *ctors[] = {\n");
2397 write_list (stream, "\t\t", constructors.first);
2399 fprintf (stream, "\treg_frame,\n");
2400 fprintf (stream, "\t};\n");
2401 fprintf (stream, "\tentry_pt **p;\n");
2402 fprintf (stream, "\tif (count++ != 0) return;\n");
2403 fprintf (stream, "\tp = ctors + %d;\n", constructors.number + frames);
2404 fprintf (stream, "\twhile (p > ctors) (*--p)();\n");
2407 fprintf (stream, "\t++count;\n");
2408 fprintf (stream, "}\n");
2409 write_list_with_asm (stream, "extern entry_pt ", destructors.first);
2410 fprintf (stream, "void %s() {\n", fininame);
2411 if (destructors.number > 0 || frames)
2413 fprintf (stream, "\tstatic entry_pt *dtors[] = {\n");
2414 write_list (stream, "\t\t", destructors.first);
2416 fprintf (stream, "\tdereg_frame,\n");
2417 fprintf (stream, "\t};\n");
2418 fprintf (stream, "\tentry_pt **p;\n");
2419 fprintf (stream, "\tif (--count != 0) return;\n");
2420 fprintf (stream, "\tp = dtors;\n");
2421 fprintf (stream, "\twhile (p < dtors + %d) (*p++)();\n",
2422 destructors.number + frames);
2424 fprintf (stream, "}\n");
2428 COLLECT_SHARED_INIT_FUNC(stream, initname);
2429 COLLECT_SHARED_FINI_FUNC(stream, fininame);
2433 /* Write the constructor/destructor tables. */
2435 #ifndef LD_INIT_SWITCH
2437 write_c_file_glob (FILE *stream, const char *name ATTRIBUTE_UNUSED)
2439 /* Write the tables as C code. */
2441 int frames = (frame_tables.number > 0);
2443 fprintf (stream, "typedef void entry_pt();\n\n");
2445 write_list_with_asm (stream, "extern entry_pt ", constructors.first);
2449 write_list_with_asm (stream, "extern void *", frame_tables.first);
2451 fprintf (stream, "\tstatic void *frame_table[] = {\n");
2452 write_list (stream, "\t\t&", frame_tables.first);
2453 fprintf (stream, "\t0\n};\n");
2455 /* This must match what's in frame.h. */
2456 fprintf (stream, "struct object {\n");
2457 fprintf (stream, " void *pc_begin;\n");
2458 fprintf (stream, " void *pc_end;\n");
2459 fprintf (stream, " void *fde_begin;\n");
2460 fprintf (stream, " void *fde_array;\n");
2461 fprintf (stream, " __SIZE_TYPE__ count;\n");
2462 fprintf (stream, " struct object *next;\n");
2463 fprintf (stream, "};\n");
2465 fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
2466 fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
2468 fprintf (stream, "static void reg_frame () {\n");
2469 fprintf (stream, "\tstatic struct object ob;\n");
2470 fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
2471 fprintf (stream, "\t}\n");
2473 fprintf (stream, "static void dereg_frame () {\n");
2474 fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
2475 fprintf (stream, "\t}\n");
2478 fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n");
2479 fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number + frames);
2480 write_list (stream, "\t", constructors.first);
2482 fprintf (stream, "\treg_frame,\n");
2483 fprintf (stream, "\t0\n};\n\n");
2485 write_list_with_asm (stream, "extern entry_pt ", destructors.first);
2487 fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n");
2488 fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number + frames);
2489 write_list (stream, "\t", destructors.first);
2491 fprintf (stream, "\tdereg_frame,\n");
2492 fprintf (stream, "\t0\n};\n\n");
2494 fprintf (stream, "extern entry_pt %s;\n", NAME__MAIN);
2495 fprintf (stream, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN);
2497 #endif /* ! LD_INIT_SWITCH */
2500 write_c_file (FILE *stream, const char *name)
2502 #ifndef LD_INIT_SWITCH
2504 write_c_file_glob (stream, name);
2507 write_c_file_stat (stream, name);
2510 #ifdef COLLECT_EXPORT_LIST
2512 write_aix_file (FILE *stream, struct id *list)
2514 for (; list; list = list->next)
2516 fputs (list->name, stream);
2517 putc ('\n', stream);
2522 #ifdef OBJECT_FORMAT_NONE
2524 /* Check to make sure the file is an ELF file. LTO objects must
2525 be in ELF format. */
2528 is_elf (const char *prog_name)
2532 static char magic[4] = { 0x7f, 'E', 'L', 'F' };
2534 f = fopen (prog_name, "r");
2537 if (fread (buf, sizeof (buf), 1, f) != 1)
2540 return memcmp (buf, magic, sizeof (magic)) == 0;
2543 /* Generic version to scan the name list of the loaded program for
2544 the symbols g++ uses for static constructors and destructors. */
2547 scan_prog_file (const char *prog_name, scanpass which_pass,
2550 void (*int_handler) (int);
2552 void (*quit_handler) (int);
2554 char *real_nm_argv[4];
2555 const char **nm_argv = CONST_CAST2 (const char **, char**, real_nm_argv);
2557 struct pex_obj *pex;
2564 if (which_pass == PASS_SECOND)
2567 /* LTO objects must be in ELF format. This check prevents
2568 us from accepting an archive containing LTO objects, which
2569 gcc cannnot currently handle. */
2570 if (which_pass == PASS_LTOINFO && !is_elf (prog_name))
2573 /* If we do not have an `nm', complain. */
2574 if (nm_file_name == 0)
2575 fatal ("cannot find 'nm'");
2577 nm_argv[argc++] = nm_file_name;
2578 if (NM_FLAGS[0] != '\0')
2579 nm_argv[argc++] = NM_FLAGS;
2581 nm_argv[argc++] = prog_name;
2582 nm_argv[argc++] = (char *) 0;
2584 /* Trace if needed. */
2587 const char **p_argv;
2590 for (p_argv = &nm_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
2591 fprintf (stderr, " %s", str);
2593 fprintf (stderr, "\n");
2599 pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
2601 fatal_perror ("pex_init failed");
2603 errmsg = pex_run (pex, 0, nm_file_name, real_nm_argv, NULL, HOST_BIT_BUCKET,
2610 fatal_perror (errmsg);
2616 int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
2618 quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
2621 inf = pex_read_output (pex, 0);
2623 fatal_perror ("can't open nm output");
2627 if (which_pass == PASS_LTOINFO)
2628 fprintf (stderr, "\nnm output with LTO info marker symbol.\n");
2630 fprintf (stderr, "\nnm output with constructors/destructors.\n");
2633 /* Read each line of nm output. */
2634 while (fgets (buf, sizeof buf, inf) != (char *) 0)
2640 fprintf (stderr, "\t%s\n", buf);
2642 if (which_pass == PASS_LTOINFO)
2647 /* Look for the LTO info marker symbol, and add filename to
2648 the LTO objects list if found. */
2649 for (p = buf; (ch = *p) != '\0' && ch != '\n'; p++)
2651 && (strncmp (p + 1, "__gnu_lto_v1", 12) == 0)
2654 add_lto_object (<o_objects, prog_name);
2656 /* We need to read all the input, so we can't just
2657 return here. But we can avoid useless work. */
2666 /* If it contains a constructor or destructor name, add the name
2667 to the appropriate list unless this is a kind of symbol we're
2668 not supposed to even consider. */
2670 for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++)
2671 if (ch == ' ' && p[1] == 'U' && p[2] == ' ')
2678 /* Find the end of the symbol name.
2679 Do not include `|', because Encore nm can tack that on the end. */
2680 for (end = p; (ch2 = *end) != '\0' && !ISSPACE (ch2) && ch2 != '|';
2686 switch (is_ctor_dtor (name))
2689 if (! (filter & SCAN_CTOR))
2691 if (which_pass != PASS_LIB)
2692 add_to_list (&constructors, name);
2696 if (! (filter & SCAN_DTOR))
2698 if (which_pass != PASS_LIB)
2699 add_to_list (&destructors, name);
2703 if (! (filter & SCAN_INIT))
2705 if (which_pass != PASS_LIB)
2706 fatal ("init function found in object %s", prog_name);
2707 #ifndef LD_INIT_SWITCH
2708 add_to_list (&constructors, name);
2713 if (! (filter & SCAN_FINI))
2715 if (which_pass != PASS_LIB)
2716 fatal ("fini function found in object %s", prog_name);
2717 #ifndef LD_FINI_SWITCH
2718 add_to_list (&destructors, name);
2723 if (! (filter & SCAN_DWEH))
2725 if (which_pass != PASS_LIB)
2726 add_to_list (&frame_tables, name);
2729 default: /* not a constructor or destructor */
2735 fprintf (stderr, "\n");
2737 do_wait (nm_file_name, pex);
2739 signal (SIGINT, int_handler);
2741 signal (SIGQUIT, quit_handler);
2747 /* Use the List Dynamic Dependencies program to find shared libraries that
2748 the output file depends upon and their initialization/finalization
2749 routines, if any. */
2752 scan_libraries (const char *prog_name)
2754 static struct head libraries; /* list of shared libraries found */
2756 void (*int_handler) (int);
2758 void (*quit_handler) (int);
2760 char *real_ldd_argv[4];
2761 const char **ldd_argv = CONST_CAST2 (const char **, char **, real_ldd_argv);
2763 struct pex_obj *pex;
2769 /* If we do not have an `ldd', complain. */
2770 if (ldd_file_name == 0)
2772 error ("cannot find 'ldd'");
2776 ldd_argv[argc++] = ldd_file_name;
2777 ldd_argv[argc++] = prog_name;
2778 ldd_argv[argc++] = (char *) 0;
2780 /* Trace if needed. */
2783 const char **p_argv;
2786 for (p_argv = &ldd_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
2787 fprintf (stderr, " %s", str);
2789 fprintf (stderr, "\n");
2795 pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
2797 fatal_perror ("pex_init failed");
2799 errmsg = pex_run (pex, 0, ldd_file_name, real_ldd_argv, NULL, NULL, &err);
2805 fatal_perror (errmsg);
2811 int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
2813 quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
2816 inf = pex_read_output (pex, 0);
2818 fatal_perror ("can't open ldd output");
2821 notice ("\nldd output with constructors/destructors.\n");
2823 /* Read each line of ldd output. */
2824 while (fgets (buf, sizeof buf, inf) != (char *) 0)
2827 char *name, *end, *p = buf;
2829 /* Extract names of libraries and add to list. */
2830 PARSE_LDD_OUTPUT (p);
2835 if (strncmp (name, "not found", sizeof ("not found") - 1) == 0)
2836 fatal ("dynamic dependency %s not found", buf);
2838 /* Find the end of the symbol name. */
2840 (ch2 = *end) != '\0' && ch2 != '\n' && !ISSPACE (ch2) && ch2 != '|';
2845 if (access (name, R_OK) == 0)
2846 add_to_list (&libraries, name);
2848 fatal ("unable to open dynamic dependency '%s'", buf);
2851 fprintf (stderr, "\t%s\n", buf);
2854 fprintf (stderr, "\n");
2856 do_wait (ldd_file_name, pex);
2858 signal (SIGINT, int_handler);
2860 signal (SIGQUIT, quit_handler);
2863 /* Now iterate through the library list adding their symbols to
2865 for (list = libraries.first; list; list = list->next)
2866 scan_prog_file (list->name, PASS_LIB, SCAN_ALL);
2869 #endif /* LDD_SUFFIX */
2871 #endif /* OBJECT_FORMAT_NONE */
2875 * COFF specific stuff.
2878 #ifdef OBJECT_FORMAT_COFF
2880 #if defined (EXTENDED_COFF)
2882 # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax)
2883 # define GCC_SYMENT SYMR
2884 # define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal)
2885 # define GCC_SYMINC(X) (1)
2886 # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax)
2887 # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0)
2891 # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms)
2892 # define GCC_SYMENT SYMENT
2893 # if defined (C_WEAKEXT)
2894 # define GCC_OK_SYMBOL(X) \
2895 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2896 ((X).n_scnum > N_UNDEF) && \
2898 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2899 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2900 # define GCC_UNDEF_SYMBOL(X) \
2901 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2902 ((X).n_scnum == N_UNDEF))
2904 # define GCC_OK_SYMBOL(X) \
2905 (((X).n_sclass == C_EXT) && \
2906 ((X).n_scnum > N_UNDEF) && \
2908 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2909 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2910 # define GCC_UNDEF_SYMBOL(X) \
2911 (((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF))
2913 # define GCC_SYMINC(X) ((X).n_numaux+1)
2914 # define GCC_SYMZERO(X) 0
2916 /* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */
2917 #if TARGET_AIX_VERSION >= 51
2918 # define GCC_CHECK_HDR(X) \
2919 ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2920 || (HEADER (X).f_magic == 0767 && aix64_flag))
2922 # define GCC_CHECK_HDR(X) \
2923 ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2924 || (HEADER (X).f_magic == 0757 && aix64_flag))
2929 #ifdef COLLECT_EXPORT_LIST
2930 /* Array of standard AIX libraries which should not
2931 be scanned for ctors/dtors. */
2932 static const char *const aix_std_libs[] = {
2940 "/usr/lib/libc_r.a",
2941 "/usr/lib/libm_r.a",
2942 "/usr/lib/threads/libc.a",
2943 "/usr/ccs/lib/libc.a",
2944 "/usr/ccs/lib/libm.a",
2945 "/usr/ccs/lib/libc_r.a",
2946 "/usr/ccs/lib/libm_r.a",
2950 /* This function checks the filename and returns 1
2951 if this name matches the location of a standard AIX library. */
2952 static int ignore_library (const char *);
2954 ignore_library (const char *name)
2956 const char *const *p;
2959 if (target_system_root[0] != '\0')
2961 length = strlen (target_system_root);
2962 if (strncmp (name, target_system_root, length) != 0)
2966 for (p = &aix_std_libs[0]; *p != NULL; ++p)
2967 if (strcmp (name, *p) == 0)
2971 #endif /* COLLECT_EXPORT_LIST */
2973 #if defined (HAVE_DECL_LDGETNAME) && !HAVE_DECL_LDGETNAME
2974 extern char *ldgetname (LDFILE *, GCC_SYMENT *);
2977 /* COFF version to scan the name list of the loaded program for
2978 the symbols g++ uses for static constructors and destructors. */
2981 scan_prog_file (const char *prog_name, scanpass which_pass,
2984 LDFILE *ldptr = NULL;
2985 int sym_index, sym_count;
2988 if (which_pass != PASS_FIRST && which_pass != PASS_OBJ)
2991 #ifdef COLLECT_EXPORT_LIST
2992 /* We do not need scanning for some standard C libraries. */
2993 if (which_pass == PASS_FIRST && ignore_library (prog_name))
2996 /* On AIX we have a loop, because there is not much difference
2997 between an object and an archive. This trick allows us to
2998 eliminate scan_libraries() function. */
3002 /* Some platforms (e.g. OSF4) declare ldopen as taking a
3003 non-const char * filename parameter, even though it will not
3004 modify that string. So we must cast away const-ness here,
3005 using CONST_CAST to prevent complaints from -Wcast-qual. */
3006 if ((ldptr = ldopen (CONST_CAST (char *, prog_name), ldptr)) != NULL)
3008 if (! MY_ISCOFF (HEADER (ldptr).f_magic))
3009 fatal ("%s: not a COFF file", prog_name);
3011 if (GCC_CHECK_HDR (ldptr))
3013 sym_count = GCC_SYMBOLS (ldptr);
3014 sym_index = GCC_SYMZERO (ldptr);
3016 #ifdef COLLECT_EXPORT_LIST
3017 /* Is current archive member a shared object? */
3018 is_shared = HEADER (ldptr).f_flags & F_SHROBJ;
3021 while (sym_index < sym_count)
3025 if (ldtbread (ldptr, sym_index, &symbol) <= 0)
3027 sym_index += GCC_SYMINC (symbol);
3029 if (GCC_OK_SYMBOL (symbol))
3033 if ((name = ldgetname (ldptr, &symbol)) == NULL)
3034 continue; /* Should never happen. */
3036 #ifdef XCOFF_DEBUGGING_INFO
3037 /* All AIX function names have a duplicate entry
3038 beginning with a dot. */
3043 switch (is_ctor_dtor (name))
3046 if (! (filter & SCAN_CTOR))
3049 add_to_list (&constructors, name);
3050 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3051 if (which_pass == PASS_OBJ)
3052 add_to_list (&exports, name);
3057 if (! (filter & SCAN_DTOR))
3060 add_to_list (&destructors, name);
3061 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3062 if (which_pass == PASS_OBJ)
3063 add_to_list (&exports, name);
3067 #ifdef COLLECT_EXPORT_LIST
3069 if (! (filter & SCAN_INIT))
3071 #ifndef LD_INIT_SWITCH
3073 add_to_list (&constructors, name);
3078 if (! (filter & SCAN_FINI))
3080 #ifndef LD_INIT_SWITCH
3082 add_to_list (&destructors, name);
3088 if (! (filter & SCAN_DWEH))
3091 add_to_list (&frame_tables, name);
3092 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3093 if (which_pass == PASS_OBJ)
3094 add_to_list (&exports, name);
3098 default: /* not a constructor or destructor */
3099 #ifdef COLLECT_EXPORT_LIST
3100 /* Explicitly export all global symbols when
3101 building a shared object on AIX, but do not
3102 re-export symbols from another shared object
3103 and do not export symbols if the user
3104 provides an explicit export list. */
3105 if (shared_obj && !is_shared
3106 && which_pass == PASS_OBJ && !export_flag)
3107 add_to_list (&exports, name);
3113 #if !defined(EXTENDED_COFF)
3114 fprintf (stderr, "\tsec=%d class=%d type=%s%o %s\n",
3115 symbol.n_scnum, symbol.n_sclass,
3116 (symbol.n_type ? "0" : ""), symbol.n_type,
3120 "\tiss = %5d, value = %5ld, index = %5d, name = %s\n",
3121 symbol.iss, (long) symbol.value, symbol.index, name);
3126 #ifdef COLLECT_EXPORT_LIST
3129 /* If archive contains both 32-bit and 64-bit objects,
3130 we want to skip objects in other mode so mismatch normal. */
3132 fprintf (stderr, "%s : magic=%o aix64=%d mismatch\n",
3133 prog_name, HEADER (ldptr).f_magic, aix64_flag);
3139 fatal ("%s: cannot open as COFF file", prog_name);
3141 #ifdef COLLECT_EXPORT_LIST
3142 /* On AIX loop continues while there are more members in archive. */
3144 while (ldclose (ldptr) == FAILURE);
3146 /* Otherwise we simply close ldptr. */
3147 (void) ldclose(ldptr);
3150 #endif /* OBJECT_FORMAT_COFF */
3152 #ifdef COLLECT_EXPORT_LIST
3153 /* Given a library name without "lib" prefix, this function
3154 returns a full library name including a path. */
3156 resolve_lib_name (const char *name)
3160 /* Library extensions for AIX dynamic linking. */
3161 const char * const libexts[2] = {"a", "so"};
3163 for (i = 0; libpaths[i]; i++)
3164 if (libpaths[i]->max_len > l)
3165 l = libpaths[i]->max_len;
3167 lib_buf = XNEWVEC (char, l + strlen(name) + 10);
3169 for (i = 0; libpaths[i]; i++)
3171 struct prefix_list *list = libpaths[i]->plist;
3172 for (; list; list = list->next)
3174 /* The following lines are needed because path_prefix list
3175 may contain directories both with trailing '/' and
3178 if (list->prefix[strlen(list->prefix)-1] != '/')
3180 for (j = 0; j < 2; j++)
3182 sprintf (lib_buf, "%s%slib%s.%s",
3183 list->prefix, p, name,
3184 libexts[(j + aixrtl_flag) % 2]);
3185 if (debug) fprintf (stderr, "searching for: %s\n", lib_buf);
3186 if (file_exists (lib_buf))
3188 if (debug) fprintf (stderr, "found: %s\n", lib_buf);
3195 fprintf (stderr, "not found\n");
3197 fatal ("library lib%s not found", name);
3200 #endif /* COLLECT_EXPORT_LIST */