http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50785
Bug #: 50785 Summary: [C++0x][constexpr] static constexpr double undefined reference Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: trashyan...@wp.pl Build: MinGW 4.6.0 20110210; MinGW 4.7.0 20110815 #include <complex> using namespace std; struct test { static constexpr double value = 0.0003; }; int main() { complex<double> x = complex<double>(0,1)*test::value; // D:\Praca\Trash/newmain.cpp:10: undefined reference to `test::value' } modyfing line 10 to complex<double> x = complex<double>(0,1)*(1*test::value); fix it.