https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65441
--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> --- Although there is support for long doubles on this target, it lacks the long double math functions added in c99. So, it doesn't have fabsl. There is a libcall implementation of abs for long double and the test passes the execution test since fabsl is folded to a built-in. However, I couldn't suppress the "incompatible implicit declaration of built-in function" warning. So probably, it's best to either explicitly disable test or require c99.