http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48851
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-03 16:09:14 UTC --- GCC provided stddef.h defines NULL properly, apparently OpenBSD thinks it knows better and provides its buggy definition. Anyway, if we want to work around it, we could use (void *) NULL or (void *) 0 instead of NULL to terminate concat arguments.