https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126966
Bug ID: 126966
Summary: feature-test- macros __cpp_lib_constexpr_cmath and
__cpp_lib_constexpr_complex not work
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gero.peterhoff at gmx dot net
Target Milestone: ---
int main()
{
#if defined(__cpp_lib_constexpr_cmath)
std::cout << (__cpp_lib_constexpr_cmath) << "\n";
#else
std::cout << "no define math\n";
#endif
#if defined(__cpp_lib_constexpr_complex)
std::cout << (__cpp_lib_constexpr_complex) << "\n";
#else
std::cout << "no define complex\n";
#endif
}
if you compile with -std=c++23 or -std=gnu++23 or above gets always
no define math
no define complex
