include cleanups: remove unused headers and add feature test macros

[musl] / src / string / index.c

diff --git a/src/string/index.c b/src/string/index.c
index dd61125..252948f 100644 (file)
--- a/src/string/index.c
+++ b/src/string/index.c
@@ -1,3 +1,4 @@
+#define _BSD_SOURCE
 #include <string.h>
 #include <strings.h>