http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33763
--- Comment #42 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Juha Kallioinen from comment #41) > Maybe this failure with a newly built gcc 4.8 is related to this bug. No, that is just a buggy testcase. Redefining a prototype, especially if you have no idea how the system function prototype looks like, is a bug. In the testcaseif you redefine the prototype to something different and obviously it then fails to inline it. Don't do that.