__glibc_clang_prereq 145 maint/gnulib/lib/cdefs.h #if __USE_FORTIFY_LEVEL == 3 && __glibc_clang_prereq (9, 0) __glibc_clang_prereq 576 maint/gnulib/lib/cdefs.h #if __GNUC_PREREQ (4,8) || __glibc_clang_prereq (3,5) __glibc_clang_prereq 59 maint/gnulib/lib/libc-config.h #ifndef __glibc_clang_prereq