--- src/Makefile.am.orig	2017-11-23 08:02:07 UTC
+++ src/Makefile.am
@@ -15,7 +15,7 @@
 # limitations under the License.
 
 # http://mij.oltrelinux.com/devel/autoconf-automake/
-AM_CFLAGS = --pedantic -Wall -std=c99 -O2
+AM_CFLAGS = --pedantic -Wall -std=c99
 AM_LDFLAGS =
 
 # bin_ installs to bin; hh_ is the binary name