1 files changed, 6 insertions, 1 deletions
diff --git a/config.mk b/config.mk
index ff0c13d..4721b02 100644
--- a/config.mk
+++ b/config.mk
@@ -1,3 +1,8 @@
 CC=ungol-gcc
-CFLAGS=-fno-builtin -g -std=iso9899:199409 -Wall -Wextra
+C_VERSION=c89
+#C_VERSION=iso9899:199409
+#C_VERSION=c99
+#C_VERSION=c11
+#C_VERSION=c17
+CFLAGS=-fno-builtin -g -std=$(C_VERSION) -Wall -Wextra
 LDFLAGS=-lc -lm