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
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;
1178 expandargv (&argc, &argv);
1179 if (argv != old_argv)
1180 at_file_supplied = 1;
1182 num_c_args = argc + 9;
1184 no_demangle = !! getenv ("COLLECT_NO_DEMANGLE");
1186 /* Suppress demangling by the real linker, which may be broken. */
1187 putenv (xstrdup ("COLLECT_NO_DEMANGLE="));
1189 #if defined (COLLECT2_HOST_INITIALIZATION)
1190 /* Perform system dependent initialization, if necessary. */
1191 COLLECT2_HOST_INITIALIZATION;
1195 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
1196 receive the signal. A different setting is inheritable */
1197 signal (SIGCHLD, SIG_DFL);
1200 /* Unlock the stdio streams. */
1201 unlock_std_streams ();
1203 gcc_init_libintl ();
1205 /* Do not invoke xcalloc before this point, since locale needs to be
1206 set first, in case a diagnostic is issued. */
1208 ld1_argv = XCNEWVEC (char *, argc + 4);
1209 ld1 = CONST_CAST2 (const char **, char **, ld1_argv);
1210 ld2_argv = XCNEWVEC (char *, argc + 11);
1211 ld2 = CONST_CAST2 (const char **, char **, ld2_argv);
1212 object_lst = XCNEWVEC (char *, argc);
1213 object = CONST_CAST2 (const char **, char **, object_lst);
1219 /* Parse command line early for instances of -debug. This allows
1220 the debug flag to be set before functions like find_a_file()
1221 are called. We also look for the -flto or -fwhopr flag to know
1222 what LTO mode we are in. */
1226 for (i = 1; argv[i] != NULL; i ++)
1228 if (! strcmp (argv[i], "-debug"))
1230 else if (! strcmp (argv[i], "-flto") && ! use_plugin)
1231 lto_mode = LTO_MODE_LTO;
1232 else if (! strcmp (argv[i], "-fwhopr") && ! use_plugin)
1233 lto_mode = LTO_MODE_WHOPR;
1234 else if (! strcmp (argv[i], "-plugin"))
1237 lto_mode = LTO_MODE_NONE;
1239 #ifdef COLLECT_EXPORT_LIST
1240 /* since -brtl, -bexport, -b64 are not position dependent
1241 also check for them here */
1242 if ((argv[i][0] == '-') && (argv[i][1] == 'b'))
1245 /* We want to disable automatic exports on AIX when user
1246 explicitly puts an export list in command line */
1247 if (arg[2] == 'E' || strncmp (&arg[2], "export", 6) == 0)
1249 else if (arg[2] == '6' && arg[3] == '4')
1251 else if (arg[2] == 'r' && arg[3] == 't' && arg[4] == 'l')
1259 #ifndef DEFAULT_A_OUT_NAME
1260 output_file = "a.out";
1262 output_file = DEFAULT_A_OUT_NAME;
1265 obstack_begin (&temporary_obstack, 0);
1266 temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0);
1268 #ifndef HAVE_LD_DEMANGLE
1269 current_demangling_style = auto_demangling;
1271 p = getenv ("COLLECT_GCC_OPTIONS");
1274 const char *q = extract_string (&p);
1275 if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
1278 obstack_free (&temporary_obstack, temporary_firstobj);
1280 /* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities
1281 -fno-exceptions -w -fno-whole-program */
1284 c_argv = XCNEWVEC (char *, num_c_args);
1285 c_ptr = CONST_CAST2 (const char **, char **, c_argv);
1288 fatal ("no arguments");
1291 if (signal (SIGQUIT, SIG_IGN) != SIG_IGN)
1292 signal (SIGQUIT, handler);
1294 if (signal (SIGINT, SIG_IGN) != SIG_IGN)
1295 signal (SIGINT, handler);
1297 if (signal (SIGALRM, SIG_IGN) != SIG_IGN)
1298 signal (SIGALRM, handler);
1301 if (signal (SIGHUP, SIG_IGN) != SIG_IGN)
1302 signal (SIGHUP, handler);
1304 if (signal (SIGSEGV, SIG_IGN) != SIG_IGN)
1305 signal (SIGSEGV, handler);
1307 if (signal (SIGBUS, SIG_IGN) != SIG_IGN)
1308 signal (SIGBUS, handler);
1311 /* Extract COMPILER_PATH and PATH into our prefix list. */
1312 prefix_from_env ("COMPILER_PATH", &cpath);
1313 prefix_from_env ("PATH", &path);
1315 /* Try to discover a valid linker/nm/strip to use. */
1317 /* Maybe we know the right file to use (if not cross). */
1319 #ifdef DEFAULT_LINKER
1320 if (access (DEFAULT_LINKER, X_OK) == 0)
1321 ld_file_name = DEFAULT_LINKER;
1322 if (ld_file_name == 0)
1324 #ifdef REAL_LD_FILE_NAME
1325 ld_file_name = find_a_file (&path, REAL_LD_FILE_NAME);
1326 if (ld_file_name == 0)
1328 /* Search the (target-specific) compiler dirs for ld'. */
1329 ld_file_name = find_a_file (&cpath, real_ld_suffix);
1330 /* Likewise for `collect-ld'. */
1331 if (ld_file_name == 0)
1332 ld_file_name = find_a_file (&cpath, collect_ld_suffix);
1333 /* Search the compiler directories for `ld'. We have protection against
1334 recursive calls in find_a_file. */
1335 if (ld_file_name == 0)
1336 ld_file_name = find_a_file (&cpath,
1340 /* Search the ordinary system bin directories
1341 for `ld' (if native linking) or `TARGET-ld' (if cross). */
1342 if (ld_file_name == 0)
1343 ld_file_name = find_a_file (&path,
1345 ? full_plugin_ld_suffix
1348 #ifdef REAL_NM_FILE_NAME
1349 nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME);
1350 if (nm_file_name == 0)
1352 nm_file_name = find_a_file (&cpath, gnm_suffix);
1353 if (nm_file_name == 0)
1354 nm_file_name = find_a_file (&path, full_gnm_suffix);
1355 if (nm_file_name == 0)
1356 nm_file_name = find_a_file (&cpath, nm_suffix);
1357 if (nm_file_name == 0)
1358 nm_file_name = find_a_file (&path, full_nm_suffix);
1361 ldd_file_name = find_a_file (&cpath, ldd_suffix);
1362 if (ldd_file_name == 0)
1363 ldd_file_name = find_a_file (&path, full_ldd_suffix);
1366 #ifdef REAL_STRIP_FILE_NAME
1367 strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME);
1368 if (strip_file_name == 0)
1370 strip_file_name = find_a_file (&cpath, gstrip_suffix);
1371 if (strip_file_name == 0)
1372 strip_file_name = find_a_file (&path, full_gstrip_suffix);
1373 if (strip_file_name == 0)
1374 strip_file_name = find_a_file (&cpath, strip_suffix);
1375 if (strip_file_name == 0)
1376 strip_file_name = find_a_file (&path, full_strip_suffix);
1378 /* Determine the full path name of the C compiler to use. */
1379 c_file_name = getenv ("COLLECT_GCC");
1380 if (c_file_name == 0)
1382 #ifdef CROSS_DIRECTORY_STRUCTURE
1383 c_file_name = concat (target_machine, "-gcc", NULL);
1385 c_file_name = "gcc";
1389 p = find_a_file (&cpath, c_file_name);
1391 /* Here it should be safe to use the system search path since we should have
1392 already qualified the name of the compiler when it is needed. */
1394 p = find_a_file (&path, c_file_name);
1399 *ld1++ = *ld2++ = ld_file_name;
1401 /* Make temp file names. */
1402 c_file = make_temp_file (".c");
1403 o_file = make_temp_file (".o");
1404 #ifdef COLLECT_EXPORT_LIST
1405 export_file = make_temp_file (".x");
1407 ldout = make_temp_file (".ld");
1408 lderrout = make_temp_file (".le");
1409 *c_ptr++ = c_file_name;
1416 #ifdef COLLECT_EXPORT_LIST
1417 /* Generate a list of directories from LIBPATH. */
1418 prefix_from_env ("LIBPATH", &libpath_lib_dirs);
1419 /* Add to this list also two standard directories where
1420 AIX loader always searches for libraries. */
1421 add_prefix (&libpath_lib_dirs, "/lib");
1422 add_prefix (&libpath_lib_dirs, "/usr/lib");
1425 /* Get any options that the upper GCC wants to pass to the sub-GCC.
1427 AIX support needs to know if -shared has been specified before
1428 parsing commandline arguments. */
1430 p = getenv ("COLLECT_GCC_OPTIONS");
1433 const char *q = extract_string (&p);
1434 if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
1435 *c_ptr++ = xstrdup (q);
1436 if (strcmp (q, "-EL") == 0 || strcmp (q, "-EB") == 0)
1437 *c_ptr++ = xstrdup (q);
1438 if (strcmp (q, "-shared") == 0)
1440 if (*q == '-' && q[1] == 'B')
1442 *c_ptr++ = xstrdup (q);
1445 q = extract_string (&p);
1446 *c_ptr++ = xstrdup (q);
1450 obstack_free (&temporary_obstack, temporary_firstobj);
1451 *c_ptr++ = "-fno-profile-arcs";
1452 *c_ptr++ = "-fno-test-coverage";
1453 *c_ptr++ = "-fno-branch-probabilities";
1454 *c_ptr++ = "-fno-exceptions";
1456 *c_ptr++ = "-fno-whole-program";
1458 /* !!! When GCC calls collect2,
1459 it does not know whether it is calling collect2 or ld.
1460 So collect2 cannot meaningfully understand any options
1461 except those ld understands.
1462 If you propose to make GCC pass some other option,
1463 just imagine what will happen if ld is really ld!!! */
1465 /* Parse arguments. Remember output file spec, pass the rest to ld. */
1466 /* After the first file, put in the c++ rt0. */
1469 #ifdef HAVE_LD_DEMANGLE
1470 if (!demangle_flag && !no_demangle)
1471 demangle_flag = "--demangle";
1473 *ld1++ = *ld2++ = demangle_flag;
1475 while ((arg = *++argv) != (char *) 0)
1477 *ld1++ = *ld2++ = arg;
1484 if (!strcmp (arg, "-debug"))
1486 /* Already parsed. */
1490 if (!strcmp (arg, "-dynamic-linker") && argv[1])
1493 *ld1++ = *ld2++ = *argv;
1498 if (strcmp (arg, "-flto") == 0 || strcmp (arg, "-fwhopr") == 0)
1501 /* Do not pass LTO flag to the linker. */
1505 error ("LTO support has not been enabled in this "
1514 /* place o_file BEFORE this argument! */
1520 #ifdef COLLECT_EXPORT_LIST
1522 /* Resolving full library name. */
1523 const char *s = resolve_lib_name (arg+2);
1525 /* Saving a full library name. */
1526 add_to_list (&libs, s);
1531 #ifdef COLLECT_EXPORT_LIST
1532 /* Saving directories where to search for libraries. */
1534 add_prefix (&cmdline_lib_dirs, arg+2);
1537 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
1539 if (is_in_args (arg,
1540 CONST_CAST2 (const char **, char **, ld1_argv),
1544 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
1549 output_file = *ld1++ = *ld2++ = *++argv;
1551 #ifdef SWITCHES_NEED_SPACES
1552 && ! strchr (SWITCHES_NEED_SPACES, arg[1])
1556 output_file = &arg[2];
1565 if (arg[2] == '\0' && do_collecting)
1567 /* We must strip after the nm run, otherwise C++ linking
1568 will not work. Thus we strip in the second ld run, or
1569 else with strip if there is no second ld run. */
1581 if (strcmp (arg, "--no-demangle") == 0)
1583 demangle_flag = arg;
1588 else if (strncmp (arg, "--demangle", 10) == 0)
1590 demangle_flag = arg;
1592 #ifndef HAVE_LD_DEMANGLE
1595 enum demangling_styles style
1596 = cplus_demangle_name_to_style (arg+11);
1597 if (style == unknown_demangling)
1598 error ("unknown demangling style '%s'", arg+11);
1600 current_demangling_style = style;
1606 else if (strncmp (arg, "--sysroot=", 10) == 0)
1607 target_system_root = arg + 10;
1611 else if ((p = strrchr (arg, '.')) != (char *) 0
1612 && (strcmp (p, ".o") == 0 || strcmp (p, ".a") == 0
1613 || strcmp (p, ".so") == 0 || strcmp (p, ".lo") == 0
1614 || strcmp (p, ".obj") == 0))
1623 /* place o_file BEFORE this argument! */
1629 if (p[1] == 'o' || p[1] == 'l')
1631 #ifdef COLLECT_EXPORT_LIST
1632 /* libraries can be specified directly, i.e. without -l flag. */
1635 /* Saving a full library name. */
1636 add_to_list (&libs, arg);
1642 #ifdef COLLECT_EXPORT_LIST
1643 /* This is added only for debugging purposes. */
1646 fprintf (stderr, "List of libraries:\n");
1647 dump_list (stderr, "\t", libs.first);
1650 /* The AIX linker will discard static constructors in object files if
1651 nothing else in the file is referenced, so look at them first. Unless
1652 we are building a shared object, ignore the eh frame tables, as we
1653 would otherwise reference them all, hence drag all the corresponding
1654 objects even if nothing else is referenced. */
1656 const char **export_object_lst
1657 = CONST_CAST2 (const char **, char **, object_lst);
1659 struct id *list = libs.first;
1661 /* Compute the filter to use from the current one, do scan, then adjust
1662 the "current" filter to remove what we just included here. This will
1663 control whether we need a first pass link later on or not, and what
1664 will remain to be scanned there. */
1666 scanfilter this_filter
1667 = shared_obj ? ld1_filter : (ld1_filter & ~SCAN_DWEH);
1669 while (export_object_lst < object)
1670 scan_prog_file (*export_object_lst++, PASS_OBJ, this_filter);
1672 for (; list; list = list->next)
1673 scan_prog_file (list->name, PASS_FIRST, this_filter);
1675 ld1_filter = ld1_filter & ~this_filter;
1680 char *buf = concat ("-bE:", export_file, NULL);
1685 exportf = fopen (export_file, "w");
1686 if (exportf == (FILE *) 0)
1687 fatal_perror ("fopen %s", export_file);
1688 write_aix_file (exportf, exports.first);
1689 if (fclose (exportf))
1690 fatal_perror ("fclose %s", export_file);
1695 *c_ptr = *ld1 = *object = (char *) 0;
1699 notice ("collect2 version %s", version_string);
1700 #ifdef TARGET_VERSION
1703 fprintf (stderr, "\n");
1709 fprintf (stderr, "ld_file_name = %s\n",
1710 (ld_file_name ? ld_file_name : "not found"));
1711 fprintf (stderr, "c_file_name = %s\n",
1712 (c_file_name ? c_file_name : "not found"));
1713 fprintf (stderr, "nm_file_name = %s\n",
1714 (nm_file_name ? nm_file_name : "not found"));
1716 fprintf (stderr, "ldd_file_name = %s\n",
1717 (ldd_file_name ? ldd_file_name : "not found"));
1719 fprintf (stderr, "strip_file_name = %s\n",
1720 (strip_file_name ? strip_file_name : "not found"));
1721 fprintf (stderr, "c_file = %s\n",
1722 (c_file ? c_file : "not found"));
1723 fprintf (stderr, "o_file = %s\n",
1724 (o_file ? o_file : "not found"));
1726 ptr = getenv ("COLLECT_GCC_OPTIONS");
1728 fprintf (stderr, "COLLECT_GCC_OPTIONS = %s\n", ptr);
1730 ptr = getenv ("COLLECT_GCC");
1732 fprintf (stderr, "COLLECT_GCC = %s\n", ptr);
1734 ptr = getenv ("COMPILER_PATH");
1736 fprintf (stderr, "COMPILER_PATH = %s\n", ptr);
1738 ptr = getenv (LIBRARY_PATH_ENV);
1740 fprintf (stderr, "%-20s= %s\n", LIBRARY_PATH_ENV, ptr);
1742 fprintf (stderr, "\n");
1745 /* Load the program, searching all libraries and attempting to provide
1746 undefined symbols from repository information.
1748 If -r or they will be run via some other method, do not build the
1749 constructor or destructor list, just return now. */
1752 = rflag || (! DO_COLLECT_EXPORT_LIST && ! do_collecting);
1754 /* Perform the first pass link now, if we're about to exit or if we need
1755 to scan for things we haven't collected yet before pursuing further.
1757 On AIX, the latter typically includes nothing for shared objects or
1758 frame tables for an executable, out of what the required early scan on
1759 objects and libraries has performed above. In the !shared_obj case, we
1760 expect the relevant tables to be dragged together with their associated
1761 functions from precise cross reference insertions by the compiler. */
1763 if (early_exit || ld1_filter != SCAN_NOTHING)
1764 do_tlink (ld1_argv, object_lst);
1768 #ifdef COLLECT_EXPORT_LIST
1769 /* Make sure we delete the export file we may have created. */
1770 if (export_file != 0 && export_file[0])
1771 maybe_unlink (export_file);
1774 maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
1776 maybe_unlink (c_file);
1777 maybe_unlink (o_file);
1782 /* Unless we have done it all already, examine the namelist and search for
1783 static constructors and destructors to call. Write the constructor and
1784 destructor tables to a .s file and reload. */
1786 if (ld1_filter != SCAN_NOTHING)
1787 scan_prog_file (output_file, PASS_FIRST, ld1_filter);
1789 #ifdef SCAN_LIBRARIES
1790 scan_libraries (output_file);
1795 notice ("%d constructor(s) found\n", constructors.number);
1796 notice ("%d destructor(s) found\n", destructors.number);
1797 notice ("%d frame table(s) found\n", frame_tables.number);
1800 /* If the scan exposed nothing of special interest, there's no need to
1801 generate the glue code and relink so return now. */
1803 if (constructors.number == 0 && destructors.number == 0
1804 && frame_tables.number == 0
1805 #if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST)
1806 /* If we will be running these functions ourselves, we want to emit
1807 stubs into the shared library so that we do not have to relink
1808 dependent programs when we add static objects. */
1813 /* Do tlink without additional code generation now if we didn't
1814 do it earlier for scanning purposes. */
1815 if (ld1_filter == SCAN_NOTHING)
1816 do_tlink (ld1_argv, object_lst);
1819 maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
1821 /* Strip now if it was requested on the command line. */
1824 char **real_strip_argv = XCNEWVEC (char *, 3);
1825 const char ** strip_argv = CONST_CAST2 (const char **, char **,
1828 strip_argv[0] = strip_file_name;
1829 strip_argv[1] = output_file;
1830 strip_argv[2] = (char *) 0;
1831 fork_execute ("strip", real_strip_argv);
1834 #ifdef COLLECT_EXPORT_LIST
1835 maybe_unlink (export_file);
1837 maybe_unlink (c_file);
1838 maybe_unlink (o_file);
1842 /* Sort ctor and dtor lists by priority. */
1843 sort_ids (&constructors);
1844 sort_ids (&destructors);
1846 maybe_unlink(output_file);
1847 outf = fopen (c_file, "w");
1848 if (outf == (FILE *) 0)
1849 fatal_perror ("fopen %s", c_file);
1851 write_c_file (outf, c_file);
1854 fatal_perror ("fclose %s", c_file);
1856 /* Tell the linker that we have initializer and finalizer functions. */
1857 #ifdef LD_INIT_SWITCH
1858 #ifdef COLLECT_EXPORT_LIST
1859 *ld2++ = concat (LD_INIT_SWITCH, ":", initname, ":", fininame, NULL);
1861 *ld2++ = LD_INIT_SWITCH;
1863 *ld2++ = LD_FINI_SWITCH;
1868 #ifdef COLLECT_EXPORT_LIST
1871 /* If we did not add export flag to link arguments before, add it to
1872 second link phase now. No new exports should have been added. */
1873 if (! exports.first)
1874 *ld2++ = concat ("-bE:", export_file, NULL);
1876 #ifndef LD_INIT_SWITCH
1877 add_to_list (&exports, initname);
1878 add_to_list (&exports, fininame);
1879 add_to_list (&exports, "_GLOBAL__DI");
1880 add_to_list (&exports, "_GLOBAL__DD");
1882 exportf = fopen (export_file, "w");
1883 if (exportf == (FILE *) 0)
1884 fatal_perror ("fopen %s", export_file);
1885 write_aix_file (exportf, exports.first);
1886 if (fclose (exportf))
1887 fatal_perror ("fclose %s", export_file);
1891 /* End of arguments to second link phase. */
1896 fprintf (stderr, "\n========== output_file = %s, c_file = %s\n",
1897 output_file, c_file);
1898 write_c_file (stderr, "stderr");
1899 fprintf (stderr, "========== end of c_file\n\n");
1900 #ifdef COLLECT_EXPORT_LIST
1901 fprintf (stderr, "\n========== export_file = %s\n", export_file);
1902 write_aix_file (stderr, exports.first);
1903 fprintf (stderr, "========== end of export_file\n\n");
1907 /* Assemble the constructor and destructor tables.
1908 Link the tables in with the rest of the program. */
1910 fork_execute ("gcc", c_argv);
1911 #ifdef COLLECT_EXPORT_LIST
1912 /* On AIX we must call tlink because of possible templates resolution. */
1913 do_tlink (ld2_argv, object_lst);
1916 maybe_run_lto_and_relink (ld2_argv, object_lst, object, false);
1918 /* Otherwise, simply call ld because tlink is already done. */
1920 maybe_run_lto_and_relink (ld2_argv, object_lst, object, true);
1922 fork_execute ("ld", ld2_argv);
1924 /* Let scan_prog_file do any final mods (OSF/rose needs this for
1925 constructors/destructors in shared libraries. */
1926 scan_prog_file (output_file, PASS_SECOND, SCAN_ALL);
1929 maybe_unlink (c_file);
1930 maybe_unlink (o_file);
1932 #ifdef COLLECT_EXPORT_LIST
1933 maybe_unlink (export_file);
1940 /* Wait for a process to finish, and exit if a nonzero status is found. */
1943 collect_wait (const char *prog, struct pex_obj *pex)
1947 if (!pex_get_status (pex, 1, &status))
1948 fatal_perror ("can't get program status");
1953 if (WIFSIGNALED (status))
1955 int sig = WTERMSIG (status);
1956 error ("%s terminated with signal %d [%s]%s",
1957 prog, sig, strsignal(sig),
1958 WCOREDUMP(status) ? ", core dumped" : "");
1959 collect_exit (FATAL_EXIT_CODE);
1962 if (WIFEXITED (status))
1963 return WEXITSTATUS (status);
1969 do_wait (const char *prog, struct pex_obj *pex)
1971 int ret = collect_wait (prog, pex);
1974 error ("%s returned %d exit status", prog, ret);
1980 unlink (response_file);
1981 response_file = NULL;
1986 /* Execute a program, and wait for the reply. */
1989 collect_execute (const char *prog, char **argv, const char *outname,
1990 const char *errname, int flags)
1992 struct pex_obj *pex;
1995 char *response_arg = NULL;
1996 char *response_argv[3] ATTRIBUTE_UNUSED;
1998 if (HAVE_GNU_LD && at_file_supplied && argv[0] != NULL)
2000 /* If using @file arguments, create a temporary file and put the
2001 contents of argv into it. Then change argv to an array corresponding
2002 to a single argument @FILE, where FILE is the temporary filename. */
2004 char **current_argv = argv + 1;
2005 char *argv0 = argv[0];
2009 /* Note: we assume argv contains at least one element; this is
2012 response_file = make_temp_file ("");
2014 f = fopen (response_file, "w");
2017 fatal ("could not open response file %s", response_file);
2019 status = writeargv (current_argv, f);
2022 fatal ("could not write to response file %s", response_file);
2024 status = fclose (f);
2027 fatal ("could not close response file %s", response_file);
2029 response_arg = concat ("@", response_file, NULL);
2030 response_argv[0] = argv0;
2031 response_argv[1] = response_arg;
2032 response_argv[2] = NULL;
2034 argv = response_argv;
2043 fprintf (stderr, "%s", argv[0]);
2045 notice ("[cannot find %s]", prog);
2047 for (p_argv = &argv[1]; (str = *p_argv) != (char *) 0; p_argv++)
2048 fprintf (stderr, " %s", str);
2050 fprintf (stderr, "\n");
2056 /* If we cannot find a program we need, complain error. Do this here
2057 since we might not end up needing something that we could not find. */
2060 fatal ("cannot find '%s'", prog);
2062 pex = pex_init (0, "collect2", NULL);
2064 fatal_perror ("pex_init failed");
2066 errmsg = pex_run (pex, flags, argv[0], argv, outname,
2073 fatal_perror (errmsg);
2080 free (response_arg);
2086 fork_execute (const char *prog, char **argv)
2088 struct pex_obj *pex;
2090 pex = collect_execute (prog, argv, NULL, NULL, PEX_LAST | PEX_SEARCH);
2091 do_wait (prog, pex);
2094 /* Unlink a file unless we are debugging. */
2097 maybe_unlink (const char *file)
2100 unlink_if_ordinary (file);
2102 notice ("[Leaving %s]\n", file);
2105 /* Call maybe_unlink on the NULL-terminated list, FILE_LIST. */
2108 maybe_unlink_list (char **file_list)
2110 char **tmp = file_list;
2113 maybe_unlink (*(tmp++));
2117 static long sequence_number = 0;
2119 /* Add a name to a linked list. */
2122 add_to_list (struct head *head_ptr, const char *name)
2125 = (struct id *) xcalloc (sizeof (struct id) + strlen (name), 1);
2127 strcpy (newid->name, name);
2129 if (head_ptr->first)
2130 head_ptr->last->next = newid;
2132 head_ptr->first = newid;
2134 /* Check for duplicate symbols. */
2135 for (p = head_ptr->first;
2136 strcmp (name, p->name) != 0;
2141 head_ptr->last->next = 0;
2146 newid->sequence = ++sequence_number;
2147 head_ptr->last = newid;
2151 /* Grab the init priority number from an init function name that
2152 looks like "_GLOBAL_.I.12345.foo". */
2155 extract_init_priority (const char *name)
2159 while (name[pos] == '_')
2161 pos += 10; /* strlen ("GLOBAL__X_") */
2163 /* Extract init_p number from ctor/dtor name. */
2164 pri = atoi (name + pos);
2165 return pri ? pri : DEFAULT_INIT_PRIORITY;
2168 /* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order.
2169 ctors will be run from right to left, dtors from left to right. */
2172 sort_ids (struct head *head_ptr)
2174 /* id holds the current element to insert. id_next holds the next
2175 element to insert. id_ptr iterates through the already sorted elements
2176 looking for the place to insert id. */
2177 struct id *id, *id_next, **id_ptr;
2179 id = head_ptr->first;
2181 /* We don't have any sorted elements yet. */
2182 head_ptr->first = NULL;
2184 for (; id; id = id_next)
2187 id->sequence = extract_init_priority (id->name);
2189 for (id_ptr = &(head_ptr->first); ; id_ptr = &((*id_ptr)->next))
2191 /* If the sequence numbers are the same, we put the id from the
2192 file later on the command line later in the list. */
2193 || id->sequence > (*id_ptr)->sequence
2194 /* Hack: do lexical compare, too.
2195 || (id->sequence == (*id_ptr)->sequence
2196 && strcmp (id->name, (*id_ptr)->name) > 0) */
2205 /* Now set the sequence numbers properly so write_c_file works. */
2206 for (id = head_ptr->first; id; id = id->next)
2207 id->sequence = ++sequence_number;
2210 /* Write: `prefix', the names on list LIST, `suffix'. */
2213 write_list (FILE *stream, const char *prefix, struct id *list)
2217 fprintf (stream, "%sx%d,\n", prefix, list->sequence);
2222 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
2223 /* Given a STRING, return nonzero if it occurs in the list in range
2224 [ARGS_BEGIN,ARGS_END). */
2227 is_in_args (const char *string, const char **args_begin,
2228 const char **args_end)
2230 const char **args_pointer;
2231 for (args_pointer = args_begin; args_pointer != args_end; ++args_pointer)
2232 if (strcmp (string, *args_pointer) == 0)
2236 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
2238 #ifdef COLLECT_EXPORT_LIST
2239 /* This function is really used only on AIX, but may be useful. */
2242 is_in_list (const char *prefix, struct id *list)
2246 if (!strcmp (prefix, list->name)) return 1;
2252 #endif /* COLLECT_EXPORT_LIST */
2254 /* Added for debugging purpose. */
2255 #ifdef COLLECT_EXPORT_LIST
2257 dump_list (FILE *stream, const char *prefix, struct id *list)
2261 fprintf (stream, "%s%s,\n", prefix, list->name);
2269 dump_prefix_list (FILE *stream, const char *prefix, struct prefix_list *list)
2273 fprintf (stream, "%s%s,\n", prefix, list->prefix);
2280 write_list_with_asm (FILE *stream, const char *prefix, struct id *list)
2284 fprintf (stream, "%sx%d __asm__ (\"%s\");\n",
2285 prefix, list->sequence, list->name);
2290 /* Write out the constructor and destructor tables statically (for a shared
2291 object), along with the functions to execute them. */
2294 write_c_file_stat (FILE *stream, const char *name ATTRIBUTE_UNUSED)
2298 int frames = (frame_tables.number > 0);
2300 /* Figure out name of output_file, stripping off .so version. */
2301 p = strrchr (output_file, '/');
2317 if (strncmp (q, SHLIB_SUFFIX, strlen (SHLIB_SUFFIX)) == 0)
2319 q += strlen (SHLIB_SUFFIX);
2326 /* q points to null at end of the string (or . of the .so version) */
2327 prefix = XNEWVEC (char, q - p + 1);
2328 strncpy (prefix, p, q - p);
2330 for (r = prefix; *r; r++)
2331 if (!ISALNUM ((unsigned char)*r))
2334 notice ("\nwrite_c_file - output name is %s, prefix is %s\n",
2335 output_file, prefix);
2337 initname = concat ("_GLOBAL__FI_", prefix, NULL);
2338 fininame = concat ("_GLOBAL__FD_", prefix, NULL);
2342 /* Write the tables as C code. */
2344 fprintf (stream, "static int count;\n");
2345 fprintf (stream, "typedef void entry_pt();\n");
2346 write_list_with_asm (stream, "extern entry_pt ", constructors.first);
2350 write_list_with_asm (stream, "extern void *", frame_tables.first);
2352 fprintf (stream, "\tstatic void *frame_table[] = {\n");
2353 write_list (stream, "\t\t&", frame_tables.first);
2354 fprintf (stream, "\t0\n};\n");
2356 /* This must match what's in frame.h. */
2357 fprintf (stream, "struct object {\n");
2358 fprintf (stream, " void *pc_begin;\n");
2359 fprintf (stream, " void *pc_end;\n");
2360 fprintf (stream, " void *fde_begin;\n");
2361 fprintf (stream, " void *fde_array;\n");
2362 fprintf (stream, " __SIZE_TYPE__ count;\n");
2363 fprintf (stream, " struct object *next;\n");
2364 fprintf (stream, "};\n");
2366 fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
2367 fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
2369 fprintf (stream, "static void reg_frame () {\n");
2370 fprintf (stream, "\tstatic struct object ob;\n");
2371 fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
2372 fprintf (stream, "\t}\n");
2374 fprintf (stream, "static void dereg_frame () {\n");
2375 fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
2376 fprintf (stream, "\t}\n");
2379 fprintf (stream, "void %s() {\n", initname);
2380 if (constructors.number > 0 || frames)
2382 fprintf (stream, "\tstatic entry_pt *ctors[] = {\n");
2383 write_list (stream, "\t\t", constructors.first);
2385 fprintf (stream, "\treg_frame,\n");
2386 fprintf (stream, "\t};\n");
2387 fprintf (stream, "\tentry_pt **p;\n");
2388 fprintf (stream, "\tif (count++ != 0) return;\n");
2389 fprintf (stream, "\tp = ctors + %d;\n", constructors.number + frames);
2390 fprintf (stream, "\twhile (p > ctors) (*--p)();\n");
2393 fprintf (stream, "\t++count;\n");
2394 fprintf (stream, "}\n");
2395 write_list_with_asm (stream, "extern entry_pt ", destructors.first);
2396 fprintf (stream, "void %s() {\n", fininame);
2397 if (destructors.number > 0 || frames)
2399 fprintf (stream, "\tstatic entry_pt *dtors[] = {\n");
2400 write_list (stream, "\t\t", destructors.first);
2402 fprintf (stream, "\tdereg_frame,\n");
2403 fprintf (stream, "\t};\n");
2404 fprintf (stream, "\tentry_pt **p;\n");
2405 fprintf (stream, "\tif (--count != 0) return;\n");
2406 fprintf (stream, "\tp = dtors;\n");
2407 fprintf (stream, "\twhile (p < dtors + %d) (*p++)();\n",
2408 destructors.number + frames);
2410 fprintf (stream, "}\n");
2414 COLLECT_SHARED_INIT_FUNC(stream, initname);
2415 COLLECT_SHARED_FINI_FUNC(stream, fininame);
2419 /* Write the constructor/destructor tables. */
2421 #ifndef LD_INIT_SWITCH
2423 write_c_file_glob (FILE *stream, const char *name ATTRIBUTE_UNUSED)
2425 /* Write the tables as C code. */
2427 int frames = (frame_tables.number > 0);
2429 fprintf (stream, "typedef void entry_pt();\n\n");
2431 write_list_with_asm (stream, "extern entry_pt ", constructors.first);
2435 write_list_with_asm (stream, "extern void *", frame_tables.first);
2437 fprintf (stream, "\tstatic void *frame_table[] = {\n");
2438 write_list (stream, "\t\t&", frame_tables.first);
2439 fprintf (stream, "\t0\n};\n");
2441 /* This must match what's in frame.h. */
2442 fprintf (stream, "struct object {\n");
2443 fprintf (stream, " void *pc_begin;\n");
2444 fprintf (stream, " void *pc_end;\n");
2445 fprintf (stream, " void *fde_begin;\n");
2446 fprintf (stream, " void *fde_array;\n");
2447 fprintf (stream, " __SIZE_TYPE__ count;\n");
2448 fprintf (stream, " struct object *next;\n");
2449 fprintf (stream, "};\n");
2451 fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
2452 fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
2454 fprintf (stream, "static void reg_frame () {\n");
2455 fprintf (stream, "\tstatic struct object ob;\n");
2456 fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
2457 fprintf (stream, "\t}\n");
2459 fprintf (stream, "static void dereg_frame () {\n");
2460 fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
2461 fprintf (stream, "\t}\n");
2464 fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n");
2465 fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number + frames);
2466 write_list (stream, "\t", constructors.first);
2468 fprintf (stream, "\treg_frame,\n");
2469 fprintf (stream, "\t0\n};\n\n");
2471 write_list_with_asm (stream, "extern entry_pt ", destructors.first);
2473 fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n");
2474 fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number + frames);
2475 write_list (stream, "\t", destructors.first);
2477 fprintf (stream, "\tdereg_frame,\n");
2478 fprintf (stream, "\t0\n};\n\n");
2480 fprintf (stream, "extern entry_pt %s;\n", NAME__MAIN);
2481 fprintf (stream, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN);
2483 #endif /* ! LD_INIT_SWITCH */
2486 write_c_file (FILE *stream, const char *name)
2488 #ifndef LD_INIT_SWITCH
2490 write_c_file_glob (stream, name);
2493 write_c_file_stat (stream, name);
2496 #ifdef COLLECT_EXPORT_LIST
2498 write_aix_file (FILE *stream, struct id *list)
2500 for (; list; list = list->next)
2502 fputs (list->name, stream);
2503 putc ('\n', stream);
2508 #ifdef OBJECT_FORMAT_NONE
2510 /* Check to make sure the file is an ELF file. LTO objects must
2511 be in ELF format. */
2514 is_elf (const char *prog_name)
2518 static char magic[4] = { 0x7f, 'E', 'L', 'F' };
2520 f = fopen (prog_name, "r");
2523 if (fread (buf, sizeof (buf), 1, f) != 1)
2526 return memcmp (buf, magic, sizeof (magic)) == 0;
2529 /* Generic version to scan the name list of the loaded program for
2530 the symbols g++ uses for static constructors and destructors. */
2533 scan_prog_file (const char *prog_name, scanpass which_pass,
2536 void (*int_handler) (int);
2538 void (*quit_handler) (int);
2540 char *real_nm_argv[4];
2541 const char **nm_argv = CONST_CAST2 (const char **, char**, real_nm_argv);
2543 struct pex_obj *pex;
2550 if (which_pass == PASS_SECOND)
2553 /* LTO objects must be in ELF format. This check prevents
2554 us from accepting an archive containing LTO objects, which
2555 gcc cannnot currently handle. */
2556 if (which_pass == PASS_LTOINFO && !is_elf (prog_name))
2559 /* If we do not have an `nm', complain. */
2560 if (nm_file_name == 0)
2561 fatal ("cannot find 'nm'");
2563 nm_argv[argc++] = nm_file_name;
2564 if (NM_FLAGS[0] != '\0')
2565 nm_argv[argc++] = NM_FLAGS;
2567 nm_argv[argc++] = prog_name;
2568 nm_argv[argc++] = (char *) 0;
2570 /* Trace if needed. */
2573 const char **p_argv;
2576 for (p_argv = &nm_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
2577 fprintf (stderr, " %s", str);
2579 fprintf (stderr, "\n");
2585 pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
2587 fatal_perror ("pex_init failed");
2589 errmsg = pex_run (pex, 0, nm_file_name, real_nm_argv, NULL, HOST_BIT_BUCKET,
2596 fatal_perror (errmsg);
2602 int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
2604 quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
2607 inf = pex_read_output (pex, 0);
2609 fatal_perror ("can't open nm output");
2613 if (which_pass == PASS_LTOINFO)
2614 fprintf (stderr, "\nnm output with LTO info marker symbol.\n");
2616 fprintf (stderr, "\nnm output with constructors/destructors.\n");
2619 /* Read each line of nm output. */
2620 while (fgets (buf, sizeof buf, inf) != (char *) 0)
2626 fprintf (stderr, "\t%s\n", buf);
2628 if (which_pass == PASS_LTOINFO)
2633 /* Look for the LTO info marker symbol, and add filename to
2634 the LTO objects list if found. */
2635 for (p = buf; (ch = *p) != '\0' && ch != '\n'; p++)
2637 && (strncmp (p +1 , "gnu_lto_v1", 10) == 0)
2640 add_lto_object (<o_objects, prog_name);
2642 /* We need to read all the input, so we can't just
2643 return here. But we can avoid useless work. */
2652 /* If it contains a constructor or destructor name, add the name
2653 to the appropriate list unless this is a kind of symbol we're
2654 not supposed to even consider. */
2656 for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++)
2657 if (ch == ' ' && p[1] == 'U' && p[2] == ' ')
2664 /* Find the end of the symbol name.
2665 Do not include `|', because Encore nm can tack that on the end. */
2666 for (end = p; (ch2 = *end) != '\0' && !ISSPACE (ch2) && ch2 != '|';
2672 switch (is_ctor_dtor (name))
2675 if (! (filter & SCAN_CTOR))
2677 if (which_pass != PASS_LIB)
2678 add_to_list (&constructors, name);
2682 if (! (filter & SCAN_DTOR))
2684 if (which_pass != PASS_LIB)
2685 add_to_list (&destructors, name);
2689 if (! (filter & SCAN_INIT))
2691 if (which_pass != PASS_LIB)
2692 fatal ("init function found in object %s", prog_name);
2693 #ifndef LD_INIT_SWITCH
2694 add_to_list (&constructors, name);
2699 if (! (filter & SCAN_FINI))
2701 if (which_pass != PASS_LIB)
2702 fatal ("fini function found in object %s", prog_name);
2703 #ifndef LD_FINI_SWITCH
2704 add_to_list (&destructors, name);
2709 if (! (filter & SCAN_DWEH))
2711 if (which_pass != PASS_LIB)
2712 add_to_list (&frame_tables, name);
2715 default: /* not a constructor or destructor */
2721 fprintf (stderr, "\n");
2723 do_wait (nm_file_name, pex);
2725 signal (SIGINT, int_handler);
2727 signal (SIGQUIT, quit_handler);
2733 /* Use the List Dynamic Dependencies program to find shared libraries that
2734 the output file depends upon and their initialization/finalization
2735 routines, if any. */
2738 scan_libraries (const char *prog_name)
2740 static struct head libraries; /* list of shared libraries found */
2742 void (*int_handler) (int);
2744 void (*quit_handler) (int);
2746 char *real_ldd_argv[4];
2747 const char **ldd_argv = CONST_CAST2 (const char **, char **, real_ldd_argv);
2749 struct pex_obj *pex;
2755 /* If we do not have an `ldd', complain. */
2756 if (ldd_file_name == 0)
2758 error ("cannot find 'ldd'");
2762 ldd_argv[argc++] = ldd_file_name;
2763 ldd_argv[argc++] = prog_name;
2764 ldd_argv[argc++] = (char *) 0;
2766 /* Trace if needed. */
2769 const char **p_argv;
2772 for (p_argv = &ldd_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
2773 fprintf (stderr, " %s", str);
2775 fprintf (stderr, "\n");
2781 pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
2783 fatal_perror ("pex_init failed");
2785 errmsg = pex_run (pex, 0, ldd_file_name, real_ldd_argv, NULL, NULL, &err);
2791 fatal_perror (errmsg);
2797 int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
2799 quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
2802 inf = pex_read_output (pex, 0);
2804 fatal_perror ("can't open ldd output");
2807 notice ("\nldd output with constructors/destructors.\n");
2809 /* Read each line of ldd output. */
2810 while (fgets (buf, sizeof buf, inf) != (char *) 0)
2813 char *name, *end, *p = buf;
2815 /* Extract names of libraries and add to list. */
2816 PARSE_LDD_OUTPUT (p);
2821 if (strncmp (name, "not found", sizeof ("not found") - 1) == 0)
2822 fatal ("dynamic dependency %s not found", buf);
2824 /* Find the end of the symbol name. */
2826 (ch2 = *end) != '\0' && ch2 != '\n' && !ISSPACE (ch2) && ch2 != '|';
2831 if (access (name, R_OK) == 0)
2832 add_to_list (&libraries, name);
2834 fatal ("unable to open dynamic dependency '%s'", buf);
2837 fprintf (stderr, "\t%s\n", buf);
2840 fprintf (stderr, "\n");
2842 do_wait (ldd_file_name, pex);
2844 signal (SIGINT, int_handler);
2846 signal (SIGQUIT, quit_handler);
2849 /* Now iterate through the library list adding their symbols to
2851 for (list = libraries.first; list; list = list->next)
2852 scan_prog_file (list->name, PASS_LIB);
2855 #endif /* LDD_SUFFIX */
2857 #endif /* OBJECT_FORMAT_NONE */
2861 * COFF specific stuff.
2864 #ifdef OBJECT_FORMAT_COFF
2866 #if defined (EXTENDED_COFF)
2868 # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax)
2869 # define GCC_SYMENT SYMR
2870 # define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal)
2871 # define GCC_SYMINC(X) (1)
2872 # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax)
2873 # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0)
2877 # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms)
2878 # define GCC_SYMENT SYMENT
2879 # if defined (C_WEAKEXT)
2880 # define GCC_OK_SYMBOL(X) \
2881 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2882 ((X).n_scnum > N_UNDEF) && \
2884 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2885 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2886 # define GCC_UNDEF_SYMBOL(X) \
2887 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2888 ((X).n_scnum == N_UNDEF))
2890 # define GCC_OK_SYMBOL(X) \
2891 (((X).n_sclass == C_EXT) && \
2892 ((X).n_scnum > N_UNDEF) && \
2894 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2895 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2896 # define GCC_UNDEF_SYMBOL(X) \
2897 (((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF))
2899 # define GCC_SYMINC(X) ((X).n_numaux+1)
2900 # define GCC_SYMZERO(X) 0
2902 /* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */
2903 #if TARGET_AIX_VERSION >= 51
2904 # define GCC_CHECK_HDR(X) \
2905 ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2906 || (HEADER (X).f_magic == 0767 && aix64_flag))
2908 # define GCC_CHECK_HDR(X) \
2909 ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2910 || (HEADER (X).f_magic == 0757 && aix64_flag))
2915 #ifdef COLLECT_EXPORT_LIST
2916 /* Array of standard AIX libraries which should not
2917 be scanned for ctors/dtors. */
2918 static const char *const aix_std_libs[] = {
2926 "/usr/lib/libc_r.a",
2927 "/usr/lib/libm_r.a",
2928 "/usr/lib/threads/libc.a",
2929 "/usr/ccs/lib/libc.a",
2930 "/usr/ccs/lib/libm.a",
2931 "/usr/ccs/lib/libc_r.a",
2932 "/usr/ccs/lib/libm_r.a",
2936 /* This function checks the filename and returns 1
2937 if this name matches the location of a standard AIX library. */
2938 static int ignore_library (const char *);
2940 ignore_library (const char *name)
2942 const char *const *p;
2945 if (target_system_root[0] != '\0')
2947 length = strlen (target_system_root);
2948 if (strncmp (name, target_system_root, length) != 0)
2952 for (p = &aix_std_libs[0]; *p != NULL; ++p)
2953 if (strcmp (name, *p) == 0)
2957 #endif /* COLLECT_EXPORT_LIST */
2959 #if defined (HAVE_DECL_LDGETNAME) && !HAVE_DECL_LDGETNAME
2960 extern char *ldgetname (LDFILE *, GCC_SYMENT *);
2963 /* COFF version to scan the name list of the loaded program for
2964 the symbols g++ uses for static constructors and destructors. */
2967 scan_prog_file (const char *prog_name, scanpass which_pass,
2970 LDFILE *ldptr = NULL;
2971 int sym_index, sym_count;
2974 if (which_pass != PASS_FIRST && which_pass != PASS_OBJ)
2977 #ifdef COLLECT_EXPORT_LIST
2978 /* We do not need scanning for some standard C libraries. */
2979 if (which_pass == PASS_FIRST && ignore_library (prog_name))
2982 /* On AIX we have a loop, because there is not much difference
2983 between an object and an archive. This trick allows us to
2984 eliminate scan_libraries() function. */
2988 /* Some platforms (e.g. OSF4) declare ldopen as taking a
2989 non-const char * filename parameter, even though it will not
2990 modify that string. So we must cast away const-ness here,
2991 using CONST_CAST to prevent complaints from -Wcast-qual. */
2992 if ((ldptr = ldopen (CONST_CAST (char *, prog_name), ldptr)) != NULL)
2994 if (! MY_ISCOFF (HEADER (ldptr).f_magic))
2995 fatal ("%s: not a COFF file", prog_name);
2997 if (GCC_CHECK_HDR (ldptr))
2999 sym_count = GCC_SYMBOLS (ldptr);
3000 sym_index = GCC_SYMZERO (ldptr);
3002 #ifdef COLLECT_EXPORT_LIST
3003 /* Is current archive member a shared object? */
3004 is_shared = HEADER (ldptr).f_flags & F_SHROBJ;
3007 while (sym_index < sym_count)
3011 if (ldtbread (ldptr, sym_index, &symbol) <= 0)
3013 sym_index += GCC_SYMINC (symbol);
3015 if (GCC_OK_SYMBOL (symbol))
3019 if ((name = ldgetname (ldptr, &symbol)) == NULL)
3020 continue; /* Should never happen. */
3022 #ifdef XCOFF_DEBUGGING_INFO
3023 /* All AIX function names have a duplicate entry
3024 beginning with a dot. */
3029 switch (is_ctor_dtor (name))
3032 if (! (filter & SCAN_CTOR))
3035 add_to_list (&constructors, name);
3036 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3037 if (which_pass == PASS_OBJ)
3038 add_to_list (&exports, name);
3043 if (! (filter & SCAN_DTOR))
3046 add_to_list (&destructors, name);
3047 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3048 if (which_pass == PASS_OBJ)
3049 add_to_list (&exports, name);
3053 #ifdef COLLECT_EXPORT_LIST
3055 if (! (filter & SCAN_INIT))
3057 #ifndef LD_INIT_SWITCH
3059 add_to_list (&constructors, name);
3064 if (! (filter & SCAN_FINI))
3066 #ifndef LD_INIT_SWITCH
3068 add_to_list (&destructors, name);
3074 if (! (filter & SCAN_DWEH))
3077 add_to_list (&frame_tables, name);
3078 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3079 if (which_pass == PASS_OBJ)
3080 add_to_list (&exports, name);
3084 default: /* not a constructor or destructor */
3085 #ifdef COLLECT_EXPORT_LIST
3086 /* Explicitly export all global symbols when
3087 building a shared object on AIX, but do not
3088 re-export symbols from another shared object
3089 and do not export symbols if the user
3090 provides an explicit export list. */
3091 if (shared_obj && !is_shared
3092 && which_pass == PASS_OBJ && !export_flag)
3093 add_to_list (&exports, name);
3099 #if !defined(EXTENDED_COFF)
3100 fprintf (stderr, "\tsec=%d class=%d type=%s%o %s\n",
3101 symbol.n_scnum, symbol.n_sclass,
3102 (symbol.n_type ? "0" : ""), symbol.n_type,
3106 "\tiss = %5d, value = %5ld, index = %5d, name = %s\n",
3107 symbol.iss, (long) symbol.value, symbol.index, name);
3112 #ifdef COLLECT_EXPORT_LIST
3115 /* If archive contains both 32-bit and 64-bit objects,
3116 we want to skip objects in other mode so mismatch normal. */
3118 fprintf (stderr, "%s : magic=%o aix64=%d mismatch\n",
3119 prog_name, HEADER (ldptr).f_magic, aix64_flag);
3125 fatal ("%s: cannot open as COFF file", prog_name);
3127 #ifdef COLLECT_EXPORT_LIST
3128 /* On AIX loop continues while there are more members in archive. */
3130 while (ldclose (ldptr) == FAILURE);
3132 /* Otherwise we simply close ldptr. */
3133 (void) ldclose(ldptr);
3136 #endif /* OBJECT_FORMAT_COFF */
3138 #ifdef COLLECT_EXPORT_LIST
3139 /* Given a library name without "lib" prefix, this function
3140 returns a full library name including a path. */
3142 resolve_lib_name (const char *name)
3146 /* Library extensions for AIX dynamic linking. */
3147 const char * const libexts[2] = {"a", "so"};
3149 for (i = 0; libpaths[i]; i++)
3150 if (libpaths[i]->max_len > l)
3151 l = libpaths[i]->max_len;
3153 lib_buf = XNEWVEC (char, l + strlen(name) + 10);
3155 for (i = 0; libpaths[i]; i++)
3157 struct prefix_list *list = libpaths[i]->plist;
3158 for (; list; list = list->next)
3160 /* The following lines are needed because path_prefix list
3161 may contain directories both with trailing '/' and
3164 if (list->prefix[strlen(list->prefix)-1] != '/')
3166 for (j = 0; j < 2; j++)
3168 sprintf (lib_buf, "%s%slib%s.%s",
3169 list->prefix, p, name,
3170 libexts[(j + aixrtl_flag) % 2]);
3171 if (debug) fprintf (stderr, "searching for: %s\n", lib_buf);
3172 if (file_exists (lib_buf))
3174 if (debug) fprintf (stderr, "found: %s\n", lib_buf);
3181 fprintf (stderr, "not found\n");
3183 fatal ("library lib%s not found", name);
3186 #endif /* COLLECT_EXPORT_LIST */