m-a-d-n-e-s-s/madness
CMakeLists.txt
:535
check_cxx_source_compiles(
"
#include <cmath>
#include <cstdlib>
long (*absptr)(long) = &std::abs;
long a = -1;
long b = std::abs(a);
int main() { return 0; }
" HAVE_STD_ABS_LONG)