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* [Bug driver/64998] New: -shared -static-libasan does not actually link libasan
@ 2015-02-10 11:48 holger.grund@ix-n.net
2015-03-10 9:20 ` [Bug driver/64998] " jakub at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: holger.grund@ix-n.net @ 2015-02-10 11:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64998
Bug ID: 64998
Summary: -shared -static-libasan does not actually link libasan
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: holger.grund@ix-n.net
It was my expectation that I could statically link libasan into a shared object
with:
$ cat t.c
void foo(char* x) { x[4] = 1; }
$ gcc -fsanitize=address t.c -shared -fPIC -static-libasan
However, it seems that -lasan is never passed to the linker and I end up with
lots of unresolved symbols:
$ readelf -s a.out | grep asan
9: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __asan_init_v3
10: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __asan_report_store1
51: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __asan_init_v3
52: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __asan_report_store1
$ gcc -fsanitize=address t.c -shared -fPIC -static-libasan
-Wl,-Bstatic,-lasan,-Bdynamic
seems to produce the expected output.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug driver/64998] -shared -static-libasan does not actually link libasan
2015-02-10 11:48 [Bug driver/64998] New: -shared -static-libasan does not actually link libasan holger.grund@ix-n.net
@ 2015-03-10 9:20 ` jakub at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-03-10 9:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64998
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, you don't want multiple libasan runtimes in multiple shared libraries or
shared library and executable, which is why -static-libasan links it only into
the executable.
You really should link -lasan dynamically ;).
^ permalink raw reply [flat|nested] 2+ messages in thread
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2015-02-10 11:48 [Bug driver/64998] New: -shared -static-libasan does not actually link libasan holger.grund@ix-n.net
2015-03-10 9:20 ` [Bug driver/64998] " jakub at gcc dot gnu.org
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