public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc(refs/users/aoliva/heads/testme)] lto/96385 - avoid unused global UNDEFs in debug objects
@ 2020-08-06 6:40 Alexandre Oliva
0 siblings, 0 replies; only message in thread
From: Alexandre Oliva @ 2020-08-06 6:40 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:b32c5d0b72fda2588b4e170e75a9c64e4bf266c7
commit b32c5d0b72fda2588b4e170e75a9c64e4bf266c7
Author: Richard Biener <rguenther@suse.de>
Date: Mon Aug 3 15:05:37 2020 +0200
lto/96385 - avoid unused global UNDEFs in debug objects
Unused global UNDEFs can have side-effects in some circumstances so
the following patch avoids them by treating them the same as other
to be discarded DEFs - make them local.
2020-08-03 Richard Biener <rguenther@suse.de>
PR lto/96385
libiberty/
* simple-object-elf.c
(simple_object_elf_copy_lto_debug_sections): Localize global
UNDEFs and reuse the prevailing name.
Diff:
---
libiberty/simple-object-elf.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libiberty/simple-object-elf.c b/libiberty/simple-object-elf.c
index c62d5bba551..7c9d492f6a4 100644
--- a/libiberty/simple-object-elf.c
+++ b/libiberty/simple-object-elf.c
@@ -1467,6 +1467,11 @@ simple_object_elf_copy_lto_debug_sections (simple_object_read *sobj,
&& st_shndx < shnum
&& pfnret[st_shndx - 1] == -1)
discard = 1;
+ /* We also need to remove global UNDEFs which can
+ cause link fails later. */
+ else if (st_shndx == SHN_UNDEF
+ && ELF_ST_BIND (*st_info) == STB_GLOBAL)
+ discard = 1;
if (discard)
{
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2020-08-06 6:40 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-06 6:40 [gcc(refs/users/aoliva/heads/testme)] lto/96385 - avoid unused global UNDEFs in debug objects Alexandre Oliva
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).