include cleanups: remove unused headers and add feature test macros

[musl] / src / passwd / putgrent.c

diff --git a/src/passwd/putgrent.c b/src/passwd/putgrent.c
index 6f26c05..a0b320f 100644 (file)
--- a/src/passwd/putgrent.c
+++ b/src/passwd/putgrent.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include <grp.h>
 #include <stdio.h>