https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91228
Bug ID: 91228
Summary: [10 regression] Removing gnu_lto_v1 symbol name breaks
LTO with Solaris ld
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Target: *-*-solaris2.*
Between 20190720 (r273633) and 20190722 (r273698), many LTO tests started to
FAIL on Solaris, e.g.
+FAIL: c-c++-common/asan/alloca_big_alignment.c -O2 -flto (test for excess
errors)
+FAIL: c-c++-common/asan/alloca_big_alignment.c -O2 -flto
-flto-partition=none (test for excess errors)
ld: warning: file /var/tmp//cc2LhvSd.debug.temp.o: section [7].symtab:
symbol[41]: global symbol has no name
ld: warning: file /var/tmp//cc2LhvSd.debug.temp.o: section [7].symtab:
symbol[44]: global symbol has no name
ld: warning: file /var/tmp//cc2LhvSd.debug.temp.o: section [7].symtab:
symbol[45]: global symbol has no name
ld: warning: file /var/tmp//cc2LhvSd.debug.temp.o: section [7].symtab:
symbol[46]: global symbol has no name
elfdump -s shows
[41] 0 0 NOTY WEAK H 0 UNDEF
[44] 0 0 NOTY WEAK H 0 UNDEF
[45] 0 0 NOTY WEAK H 0 UNDEF
[46] 0 0 NOTY WEAK H 0 UNDEF
while before there had been:
[41] 0 0 NOTY WEAK H 0 UNDEF gnu_lto_v1
[44] 0 0 NOTY WEAK H 0 UNDEF gnu_lto_v1
[45] 0 0 NOTY WEAK H 0 UNDEF gnu_lto_v1
[46] 0 0 NOTY WEAK H 0 UNDEF gnu_lto_v1
This is obviously caused by
Do not emit __gnu_lto_v1 symbol.
2019-07-22 Martin Liska <mli...@suse.cz>
* config/avr/avr.c (avr_asm_output_aligned_decl_common): Update
comment.
* toplev.c (compile_file): Do not emit __gnu_lto_v1 symbol.
2019-07-22 Martin Liska <mli...@suse.cz>
* config/pa/stublib.c: Remove stub symbol __gnu_lto_v1.
* config/pa/t-stublib: Likewise.
2019-07-22 Martin Liska <mli...@suse.cz>
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Do not search for gnu_lto_v1, but search for first '\0'.
