/* Use that config to declare missing elements */
#ifdef SIMGRID_NEED_GETLINE
+#include <stdlib.h> /* size_t */
+#include <stdio.h> /* FILE* */
XBT_PUBLIC(long) getline(char **lineptr, size_t * n, FILE * stream);
#else
-#define _GNU_SOURCE
+#ifndef _GNU_SOURCE
+ #define _GNU_SOURCE
+#endif
#include <stdio.h>
#endif