https://llvm.org/bugs/show_bug.cgi?id=31495
Bug ID: 31495
Summary: LLD fails to link object file with version-extended
symbol
Product: lld
Version: unspecified
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: ELF
Assignee: unassignedb...@nondot.org
Reporter: ema...@freebsd.org
CC: llvm-bugs@lists.llvm.org
Blocks: 23214
Classification: Unclassified
FreeBSD's "pkg" package management tool is currently building an object file
that depends on a compatibility symbol. I think this needs to be addressed in
pkg itself, but GNU ld is able to link such an object.
LLD reports:
% ld.lld $(cat response.txt)
/tank/emaste/src/llvm/build-nodebug/bin/ld.lld: error:
wrkdirs/usr/ports/ports-mgmt/pkg/work/pkg-1.7.2/libpkg/.libs/libpkg.lax/libbsd_compat.a/libbsd_compat_la-basename.o:
symbol basename@FBSD_1.0 has undefined version FBSD_1.0
/tank/emaste/src/llvm/build-nodebug/bin/ld.lld: error:
wrkdirs/usr/ports/ports-mgmt/pkg/work/pkg-1.7.2/libpkg/.libs/libpkg.lax/libbsd_compat.a/libbsd_compat_la-dirname.o:
symbol dirname@FBSD_1.0 has undefined version FBSD_1.0
ld.bfd has no complaints:
% ld.bfd $(cat response.txt)
%
The offending symbol is basename@FBSD_1.0:
% readelf -s libbsd_compat_la-basename.o
Symbol table '.symtab' contains 5 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 FILE LOCAL DEFAULT ABS basename.c
2: 0000000000000000 0 SECTION LOCAL DEFAULT 2
3: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND basename@FBSD_1.0
4: 0000000000000000 10 FUNC GLOBAL DEFAULT 2 bsd_basename
And indeed, a .o file has no symver information:
% readelf -V libbsd_compat_la-basename.o
No version information found in this file.
I suspect we should accept version-extended symbols from object files.
Reprodcer available at
https://people.freebsd.org/~emaste/lld/object-sym-version.cpio
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