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2013-08-22 Magnus Granberg <zorry@gentoo.org>
* gcc/gcc.c (main): Add support for external spec file via the GCC_SPECS env var
and move the process of the user specifed specs.
This allows us to easily control pie/ssp defaults with gcc-config profiles.
Original patch by Rob Holland
Extended to support multiple entries separated by ':' by Kevin F. Quinn
Modified to use getenv instead of poisoned GET_ENVIRONMENT by Ryan Hill
Modified to process the GCC_SPECS env var befor DRIVER_SELF_SPECS by Magnus Granberg
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -6427,6 +6428,48 @@ main (int argc, char **argv)
do_option_spec (option_default_specs[i].name,
option_default_specs[i].spec);
+#if !(defined (__MSDOS__) || defined (OS2) || defined (VMS) || defined (WIN32))
+ /* Add specs listed in GCC_SPECS. Note; in the process of separating
+ * each spec listed, the string is overwritten at token boundaries
+ * (':') with '\0', an effect of strtok_r().
+ */
+ specs_file = getenv ("GCC_SPECS");
+ if (specs_file && (strlen(specs_file) > 0))
+ {
+ char *spec, *saveptr;
+ for (spec=strtok_r(specs_file,":",&saveptr);
+ spec!=NULL;
+ spec=strtok_r(NULL,":",&saveptr))
+ {
+ struct user_specs *user = (struct user_specs *)
+ xmalloc (sizeof (struct user_specs));
+ user->next = (struct user_specs *) 0;
+ user->filename = spec;
+ if (user_specs_tail)
+ user_specs_tail->next = user;
+ else
+ user_specs_head = user;
+ user_specs_tail = user;
+ }
+ }
+#endif
+ /* Process any user specified specs in the order given on the command
+ * line. */
+ for (struct user_specs *uptr = user_specs_head; uptr; uptr = uptr->next)
+ {
+ char *filename = find_a_file (&startfile_prefixes, uptr->filename,
+ R_OK, true);
+ read_specs (filename ? filename : uptr->filename, false, true);
+ }
+ /* Process any user self specs. */
+ {
+ struct spec_list *sl;
+ for (sl = specs; sl; sl = sl->next)
+ if (sl->name_len == sizeof "self_spec" - 1
+ && !strcmp (sl->name, "self_spec"))
+ do_self_spec (*sl->ptr_spec);
+ }
+
/* Process DRIVER_SELF_SPECS, adding any new options to the end
of the command line. */
@@ -6535,24 +6578,6 @@ main (int argc, char **argv)
PREFIX_PRIORITY_LAST, 0, 1);
}
- /* Process any user specified specs in the order given on the command
- line. */
- for (struct user_specs *uptr = user_specs_head; uptr; uptr = uptr->next)
- {
- char *filename = find_a_file (&startfile_prefixes, uptr->filename,
- R_OK, true);
- read_specs (filename ? filename : uptr->filename, false, true);
- }
-
- /* Process any user self specs. */
- {
- struct spec_list *sl;
- for (sl = specs; sl; sl = sl->next)
- if (sl->name_len == sizeof "self_spec" - 1
- && !strcmp (sl->name, "self_spec"))
- do_self_spec (*sl->ptr_spec);
- }
-
if (compare_debug)
{
enum save_temps save;
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