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| author | Richard Biener <rguenther@suse.de> | 2020-08-03 15:05:37 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2020-08-03 15:09:20 +0200 |
| commit | b32c5d0b72fda2588b4e170e75a9c64e4bf266c7 (patch) | |
| tree | f44cf2f956326620ccc778762cd09c5310e3ff6a | |
| parent | 5e97638b0adfb822d3b156c07da27d41091ce137 (diff) | |
| download | gcc-b32c5d0b72fda2588b4e170e75a9c64e4bf266c7.zip gcc-b32c5d0b72fda2588b4e170e75a9c64e4bf266c7.tar.gz gcc-b32c5d0b72fda2588b4e170e75a9c64e4bf266c7.tar.bz2 | |
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.
| -rw-r--r-- | libiberty/simple-object-elf.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libiberty/simple-object-elf.c b/libiberty/simple-object-elf.c index c62d5bb..7c9d492 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) { |