_GNU_SOURCE        52 gnulib-tests/vasnprintf.c #ifndef _GNU_SOURCE
_GNU_SOURCE        24 lib/fnmatch.c  #ifndef _GNU_SOURCE
_GNU_SOURCE        42 lib/fnmatch.in.h #if !defined _POSIX_C_SOURCE || _POSIX_C_SOURCE < 2 || defined _GNU_SOURCE
_GNU_SOURCE        36 lib/regex.h    #if (defined _GNU_SOURCE					\