https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78562
--- Comment #5 from Georg-Johann Lay <gjl at gcc dot gnu.org> --- Maybe it is an option to be less strict? In the test case, both function name and asm name (libname) are in the namespace of the implementation: both start with 2 underscores. The function name even starts with __builtin_...
