https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99406
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- gcc/system.h has: #ifndef MAP_FAILED # define MAP_FAILED ((void *)-1) #endif #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON) # define MAP_ANONYMOUS MAP_ANON #endif so I think libgcov.h needs to do that too.