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).
