On Tue, May 07, 2024, Edward Liaw wrote: > _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to > prevent _GNU_SOURCE redefined warnings. ... > diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c > index 8965c311bd65..5cd13279bba5 100644 > --- a/tools/testing/selftests/x86/test_syscall_vdso.c > +++ b/tools/testing/selftests/x86/test_syscall_vdso.c > @@ -8,10 +8,6 @@ > * Can be built statically: > * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S > */ > -#undef _GNU_SOURCE > -#define _GNU_SOURCE 1 > -#undef __USE_GNU > -#define __USE_GNU 1 AFAICT, manually defining __USE_GNU is frowned upon, so I'm guessing the __USE_GNU stuff is just the result of misguided copy+paste. But it would be nice to get confirmation that this test isn't doing something clever. Or at the very least, explain the removal of __USE_GNU in the changelog. > #include <unistd.h> > #include <stdlib.h> > #include <string.h>
