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[Bug lto/82575] [8 Regression] lto debugobj references __gnu_lto_slim, ld test liblto-17 fails
- From: "amodra at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 19 Oct 2017 23:06:52 +0000
- Subject: [Bug lto/82575] [8 Regression] lto debugobj references __gnu_lto_slim, ld test liblto-17 fails
- Auto-submitted: auto-generated
- References: <bug-82575-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82575
--- Comment #8 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Thu Oct 19 23:06:20 2017
New Revision: 253914
URL: https://gcc.gnu.org/viewcvs?rev=253914&root=gcc&view=rev
Log:
PR82575, lto debugobj references __gnu_lto_slim, ld test liblto-17 fails
If __gnu_lto_slim is global, undefined, default visibility in the
early debug object, then it finds its way into .dynsym when creating
shared libraries. __gnu_lto_slim in a symbol table (.dynsym or
.symtab) signals nm and other binutils that the object is an LTO
object needing a plugin, but that isn't the case for the ld liblti-17
tests. So, make __gnu_lto_slim hidden to prevent it becoming
dynamic. Further, make it weak because some linkers may warn on
finding an undefined global non-default visibility symbol.
PR lto/82575
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Make discarded non-local symbols weak and hidden.
Modified:
trunk/libiberty/ChangeLog
trunk/libiberty/simple-object-elf.c