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* [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors @ 2012-10-03 22:28 matt at godbolt dot org 2012-10-04 7:11 ` [Bug c++/54801] " daniel.kruegler at googlemail dot com ` (7 more replies) 0 siblings, 8 replies; 9+ messages in thread From: matt at godbolt dot org @ 2012-10-03 22:28 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Bug #: 54801 Summary: [c++11] static variables constructed with lambda params inside member functions cause undefined errors Classification: Unclassified Product: gcc Version: 4.7.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: matt@godbolt.org Created attachment 28346 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28346 Test C file exhibiting the issue In the attached code, there is static method with a static variable whose constructor takes a function pointer. When a lambda is passed as the function pointer, it seems the lambda's definition is dropped and the result is a link-time error. $ g++ -o test -std=c++0x test.cc /tmp/ccpBFtG7.o: In function `Test::aFunc()::{lambda(int*)#1}::operator void (*)(int*)() const': test.cc:(.text._ZZN4Test5aFuncEvENKUlPiE_cvPFvS0_EEv[_ZZN4Test5aFuncEvENKUlPiE_cvPFvS0_EEv]+0x9): undefined reference to `Test::aFunc()::{lambda(int*)#1}::_FUN(int*)' collect2: error: ld returned 1 exit status Making the variable non-static fixes the issue. The same code in a free function does not exhibit the problem. Taking a std::function<void(int*)> as the constructor parameter also cures the issue. It seems to be something which only throws away the lambda for static variables inside member functions. More info: g++ -v Using built-in specs. COLLECT_GCC=/site/apps/gcc-4.7.2-drw.patched.1/bin/g++ COLLECT_LTO_WRAPPER=/site/apps/gcc-4.7.2-drw.patched.1/libexec/gcc/x86_64-linux-gnu/4.7.2/lto-wrapper Target: x86_64-linux-gnu Configured with: ./configure --prefix /site/apps/gcc-4.7.2-drw.patched.1 --build=x86_64-linux-gnu --enable-clocale=gnu --enable-gold --enable-languages=c,c++ --enable-ld=default --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-linker-build-id --enable-lto --enable-plugin --enable-shared --enable-threads=posix --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-pkgversion=DRW-internal-build --with-plugin-ld=ld.gold --with-system-zlib --with-gmp=/data/teamcity/work/sup-chietfbld02-002/8a981abc13d5c0c5/scratch/gcc/4.7.2/build/gmp-5.0.2 --with-mpfr=/data/teamcity/work/sup-chietfbld02-002/8a981abc13d5c0c5/scratch/gcc/4.7.2/build/mpfr-3.1.1 --with-mpc=/data/teamcity/work/sup-chietfbld02-002/8a981abc13d5c0c5/scratch/gcc/4.7.2/build/mpc-0.9 --with-libelf=/data/teamcity/work/sup-chietfbld02-002/8a981abc13d5c0c5/scratch/gcc/4.7.2/build/libelf-0.8.9 Thread model: posix gcc version 4.7.2 (DRW-internal-build) This issue was discovered when attempting to register lambda functions as the "cleanup function" for static thread-local stored information using boost::thread_specific_ptr. However, the issue is reproducible in the attached source file with no external includes. This appears to be a regression in 4.7.2: gcc versions 4.7.1, 4.7.0, 4.6.3 and 4.5.3 compile the source without issue. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [c++11] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org @ 2012-10-04 7:11 ` daniel.kruegler at googlemail dot com 2012-10-04 8:41 ` paolo.carlini at oracle dot com ` (6 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: daniel.kruegler at googlemail dot com @ 2012-10-04 7:11 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Daniel Krügler <daniel.kruegler at googlemail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |daniel.kruegler at | |googlemail dot com --- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-10-04 07:11:14 UTC --- Also occurs on gcc 4.8.0 20120930 (experimental). ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [c++11] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org 2012-10-04 7:11 ` [Bug c++/54801] " daniel.kruegler at googlemail dot com @ 2012-10-04 8:41 ` paolo.carlini at oracle dot com 2012-10-04 9:27 ` [Bug c++/54801] [4.7/4.8 Regression] " paolo.carlini at oracle dot com ` (5 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: paolo.carlini at oracle dot com @ 2012-10-04 8:41 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-10-04 Blocks| |54367 Ever Confirmed|0 |1 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [4.7/4.8 Regression] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org 2012-10-04 7:11 ` [Bug c++/54801] " daniel.kruegler at googlemail dot com 2012-10-04 8:41 ` paolo.carlini at oracle dot com @ 2012-10-04 9:27 ` paolo.carlini at oracle dot com 2012-10-04 11:25 ` jakub at gcc dot gnu.org ` (4 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: paolo.carlini at oracle dot com @ 2012-10-04 9:27 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hjl.tools at gmail dot com Summary|[c++11] static variables |[4.7/4.8 Regression] static |constructed with lambda |variables constructed with |params inside member |lambda params inside member |functions cause undefined |functions cause undefined |errors |errors --- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-04 09:26:55 UTC --- Confirmed. Maybe H.J can help. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [4.7/4.8 Regression] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org ` (2 preceding siblings ...) 2012-10-04 9:27 ` [Bug c++/54801] [4.7/4.8 Regression] " paolo.carlini at oracle dot com @ 2012-10-04 11:25 ` jakub at gcc dot gnu.org 2012-10-04 11:41 ` paolo.carlini at oracle dot com ` (3 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: jakub at gcc dot gnu.org @ 2012-10-04 11:25 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-04 11:24:46 UTC --- http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189175 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [4.7/4.8 Regression] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org ` (3 preceding siblings ...) 2012-10-04 11:25 ` jakub at gcc dot gnu.org @ 2012-10-04 11:41 ` paolo.carlini at oracle dot com 2012-11-25 15:55 ` rguenth at gcc dot gnu.org ` (2 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: paolo.carlini at oracle dot com @ 2012-10-04 11:41 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC|hjl.tools at gmail dot com |jason at gcc dot gnu.org --- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-04 11:41:06 UTC --- Thanks Jakub. Let's add Jason in CC then. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [4.7/4.8 Regression] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org ` (4 preceding siblings ...) 2012-10-04 11:41 ` paolo.carlini at oracle dot com @ 2012-11-25 15:55 ` rguenth at gcc dot gnu.org 2012-12-03 15:46 ` rguenth at gcc dot gnu.org 2012-12-06 15:45 ` paolo.carlini at oracle dot com 7 siblings, 0 replies; 9+ messages in thread From: rguenth at gcc dot gnu.org @ 2012-11-25 15:55 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.7.3 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [4.7/4.8 Regression] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org ` (5 preceding siblings ...) 2012-11-25 15:55 ` rguenth at gcc dot gnu.org @ 2012-12-03 15:46 ` rguenth at gcc dot gnu.org 2012-12-06 15:45 ` paolo.carlini at oracle dot com 7 siblings, 0 replies; 9+ messages in thread From: rguenth at gcc dot gnu.org @ 2012-12-03 15:46 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P2 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/54801] [4.7/4.8 Regression] static variables constructed with lambda params inside member functions cause undefined errors 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org ` (6 preceding siblings ...) 2012-12-03 15:46 ` rguenth at gcc dot gnu.org @ 2012-12-06 15:45 ` paolo.carlini at oracle dot com 7 siblings, 0 replies; 9+ messages in thread From: paolo.carlini at oracle dot com @ 2012-12-06 15:45 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54801 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |DUPLICATE --- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-12-06 15:44:50 UTC --- Dup. *** This bug has been marked as a duplicate of bug 55015 *** ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2012-12-06 15:45 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-10-03 22:28 [Bug c++/54801] New: [c++11] static variables constructed with lambda params inside member functions cause undefined errors matt at godbolt dot org 2012-10-04 7:11 ` [Bug c++/54801] " daniel.kruegler at googlemail dot com 2012-10-04 8:41 ` paolo.carlini at oracle dot com 2012-10-04 9:27 ` [Bug c++/54801] [4.7/4.8 Regression] " paolo.carlini at oracle dot com 2012-10-04 11:25 ` jakub at gcc dot gnu.org 2012-10-04 11:41 ` paolo.carlini at oracle dot com 2012-11-25 15:55 ` rguenth at gcc dot gnu.org 2012-12-03 15:46 ` rguenth at gcc dot gnu.org 2012-12-06 15:45 ` paolo.carlini at oracle dot com
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