Added _GNU_SOURCE to every file

We are not aiming for high portability with this program. Anywhere that
Guile is available, we should be able to access _GNU_SOURCE extensions.

1 files changed, 2 insertions, 0 deletions

diff --git a/cmd/main.c b/cmd/main.c
index 51a4e62..abb433f 100644
--- a/cmd/main.c
+++ b/cmd/main.c
@@ -16,6 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+#define _GNU_SOURCE
+
 #include <libguile.h>
 #include <stdbool.h>
 #include <stdio.h>