https://sourceware.org/bugzilla/show_bug.cgi?id=32854
Bug ID: 32854
Summary: Default versioned symbol in shared library is ignored
with LTO
Product: binutils
Version: 2.45 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
when a shared library defines 'foo@@FOO' (default version),
a static archive defines 'foo', the shared lib comes in front
of the archive and under effect of --as-needed, and the requesting
object file uses LTO, then the link editor was wrongly including
the definition from the static archive. It must use the one
from the shared lib, like in the non-LTO or the --no-as-needed case.
[hjl@gnu-tgl-3 lto-6]$ cat lto-20a.c
extern int foo ();
int main () { return foo (); }
[hjl@gnu-tgl-3 lto-6]$ cat lto-20b.c
extern int printf (const char *, ...);
int foo ()
{
#ifdef SHARED
printf ("PASS\n");
return 0;
#else
printf ("FAIL\n");
return 1;
#endif
}
[hjl@gnu-tgl-3 lto-6]$ cat lto-20.ver
FOO { global: foo; };
[hjl@gnu-tgl-3 lto-6]$ make
gcc -B./ -O2 -flto -c -o lto-20a.o lto-20a.c
gcc -B./ -c -DSHARED -fPIC -O2 -o lto-20b-shared.o lto-20b.c
ld -shared -o liblto-20.so --version-script=lto-20.ver lto-20b-shared.o
gcc -B./ -c -fPIC -O2 -o lto-20b-static.o lto-20b.c
ar -rv liblto-20_static.a lto-20b-static.o
ar: creating liblto-20_static.a
a - lto-20b-static.o
gcc -B./ -O2 -Wl,--as-needed,-R,. -o x lto-20a.o liblto-20.so
liblto-20_static.a -Wl,--no-as-needed
./x
FAIL
make: *** [Makefile:8: all] Error 1
[hjl@gnu-tgl-3 lto-6]$
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