Fix typo (__GNU_SOURCE -> __USE_GNU).

diff --git a/string/bits/string2.h b/string/bits/string2.h
index db6ba97..9d31e16 100644 (file)
--- a/string/bits/string2.h
+++ b/string/bits/string2.h
@@ -1225,7 +1225,7 @@ __strsep_g (char **__s, __const char *__reject)
                          __retval; }))                                       \
                  : __strndup ((s), (n))))
 
-#  ifdef __GNU_SOURCE
+#  ifdef __USE_GNU
 #   define strndup(s, n) __strndup ((s), (n))
 #  endif
 # endif