https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81073
Bug ID: 81073 Summary: link failure as C++ misses to instanciate some objects Product: gcc Version: 7.1.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gjl at gcc dot gnu.org Target Milestone: --- $ g++ struct.cpp -Os -save-temps the following C++ test case struct.cpp: struct test { const int *addr; }; const test* setup() { static constexpr test atest = { ({ static const int inner = 123; &inner; }) }; return &atest; } int main(){} This gives a linker error: struct.o:(.rodata+0x0): undefined reference to `setup()::inner' "atest" is initialized as expected with a reference to _ZZ5setupvE5inner, but that object is never instanciated, resulting in a link failure. Seeing this with v7.1 on and for x86_64-linux-gnu, also on trunk (future v8).