| Summary: | [4.1 regression] static const member in template class leads to multiple definitions at linktime | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Randolph Chung <tausq> |
| Component: | c++ | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | bangerth, dave, debian-gcc, fang, gcc-bugs, lidaobing, mark, matz, peter.soetens, pinskia, pintaric, rguenth, tausq, tbm |
| Priority: | P3 | ||
| Version: | 4.1.2 | ||
| Target Milestone: | --- | ||
| Host: | hppa-unknown-linux | Target: | hppa-unknown-linux |
| Build: | hppa-unknown-linux | Known to work: | 3.4.6 4.0.4 |
| Known to fail: | 4.1.2 | Last reconfirmed: | |
| Attachments: | testcase | ||
Created attachment 12026 [details]
testcase
This has been fixed already, both in GCC's SVN and in Debian's gcc-4.1 package.
The reason you see it on HPPA is that recent version of gcc-4.1 in Debian don't build. This bug was fixed in -9 but hppa still has -8. Can you investigate why recent gcc-4.1 in Debian doesn't compile on HPPA?
gcc-4.1 (4.1.1-9) unstable; urgency=low
* Update to SVN 20060715.
- Fix PR c++/28016, do not emit uninstantiated static data members.
Closes: #373895, #376871.
*** This bug has been marked as a duplicate of 28016 ***
|
with the attached testcase, during linking you get: test2.o:(.data+0x0): multiple definition of `_ZN3BadIT_E2_yE' test1.o:(.data+0x0): first defined here this comes from a template class: template <class T> class Bad { static const int _y; }; template <class T> const int Bad<T>::_y = 1023; although this seems like a generic c++ problem, it was only observed on hppa-linux and not on other platforms. this test was simplified from a failure reported in building the quantlib package against g++-4.1. With earlier g++ versions the package builds fine.