--- a/src/Makefile.am	Wed May 31 12:32:22 2017 +0200
+++ b/src/Makefile.am	Wed May 31 12:51:24 2017 +0200
@@ -22,9 +22,9 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 
 if DEBUG
-AM_CFLAGS = -std=gnu99 -O0 -Wall
+AM_CFLAGS = -g -O0 -Wall
 else
-AM_CFLAGS = -std=gnu99 -O2
+AM_CFLAGS = -O2
 endif
 
 bin_PROGRAMS = cline