nixpkgs/pkgs/applications/editors/emacs-24/darwin-new-sections.patch
Eelco Dolstra a7c1541a21 emacs: Fix building on Darwin with recent versions of GCC
This gets rid of the "unexec: unrecognized section __static_data in
__DATA segment" error while dumping Emacs.
2014-08-09 19:08:37 +02:00

51 lines
2.4 KiB
Diff

http://bazaar.launchpad.net/~naesten/emacs/nextstep-stuff/revision/108961
diff -ru emacs-24.3-orig/src/unexmacosx.c emacs-24.3/src/unexmacosx.c
--- emacs-24.3-orig/src/unexmacosx.c 2013-01-01 21:37:17.000000000 +0100
+++ emacs-24.3/src/unexmacosx.c 2014-08-09 18:39:52.000000000 +0200
@@ -838,7 +838,7 @@
if (!(sectp->addr <= (unsigned long)my_edata
&& my_size <= sectp->size))
unexec_error ("my_edata is not in section %s", SECT_DATA);
- if (!unexec_write (sectp->offset, (void *) sectp->addr, my_size))
+ if (!unexec_write (sectp->offset, (void *) sectp->addr, sectp->size))
unexec_error ("cannot write section %s", SECT_DATA);
if (!unexec_copy (sectp->offset + my_size, old_file_offset + my_size,
sectp->size - my_size))
@@ -880,6 +880,27 @@
if (!unexec_write (header_offset, sectp, sizeof (struct section)))
unexec_error ("cannot write section %.16s's header", sectp->sectname);
}
+ else if (strncmp (sectp->sectname, "__bss", 5) == 0
+ || strncmp (sectp->sectname, "__pu_bss", 8) == 0)
+ {
+ sectp->flags = S_REGULAR;
+
+ /* These sections are produced by GCC 4.6+.
+
+ FIXME: We possibly ought to clear uninitialized local
+ variables in statically linked libraries like for
+ SECT_BSS (__bss) above, but setting up the markers we
+ need in lastfile.c would be rather messy. See
+ darwin_output_aligned_bss () in gcc/config/darwin.c for
+ the root of the problem, keeping in mind that the
+ sections are numbered by their alignment in GCC 4.6, but
+ by log2(alignment) in GCC 4.7. */
+
+ if (!unexec_write (sectp->offset, (void *) sectp->addr, sectp->size))
+ unexec_error ("cannot copy section %.16s", sectp->sectname);
+ if (!unexec_write (header_offset, sectp, sizeof (struct section)))
+ unexec_error ("cannot write section %.16s's header", sectp->sectname);
+ }
else if (strncmp (sectp->sectname, "__la_symbol_ptr", 16) == 0
|| strncmp (sectp->sectname, "__nl_symbol_ptr", 16) == 0
|| strncmp (sectp->sectname, "__got", 16) == 0
@@ -891,6 +912,7 @@
|| strncmp (sectp->sectname, "__program_vars", 16) == 0
|| strncmp (sectp->sectname, "__mod_init_func", 16) == 0
|| strncmp (sectp->sectname, "__mod_term_func", 16) == 0
+ || strncmp (sectp->sectname, "__static_data", 16) == 0
|| strncmp (sectp->sectname, "__objc_", 7) == 0)
{
if (!unexec_copy (sectp->offset, old_file_offset, sectp->size))