https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114229
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=112820
Ever confirmed|0 |1
Last reconfirmed| |2024-03-05
Known to fail| |13.2.0, 14.0
Status|UNCONFIRMED |NEW
--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Confirmed, thanks for the bug report. Reduced (needs -fno-module-lazy):
$ cat 114229_a.C
module;
template<class> struct basic_streambuf { virtual void overflow() { } };
extern template struct basic_streambuf<long>;
export module modA;
export basic_streambuf<long> *p;
$ cat 114229_b.C
export module modB;
import modA;
$ cat 114229_c.C
import modA;
import modB;
int main() { }
$ cat 114229_d.C
template<class> struct basic_streambuf { virtual void overflow() { } };
template struct basic_streambuf<long>;
$ g++ -Wno-global-module -fmodules-ts -fno-module-lazy 114229_*.C
/usr/bin/ld: /tmp/ccNDPhFZ.o:(.rodata+0x0): multiple definition of `vtable for
basic_streambuf<long>'; /tmp/ccW7B4xy.o:(.rodata+0x0): first defined here
PR112820 also was extern template related.
