debian/rules: Force gcc -std=gnu17

We have a lot of old-style function declarations.

Closes: #1098077

diff --git a/debian/rules b/debian/rules
index f7fa82b6fc08a0469b399e7cfbf4a8b8e20136bb..c1bb0a18ae1571844accbdf2bba7582ecb27ce0e 100755 (executable)
--- a/debian/rules
+++ b/debian/rules
@@ -27,7 +27,7 @@ override_dh_auto_configure:
        xmkmf
 
 override_dh_auto_build:
-       $(MAKE) LIBDIR=/usr/lib TWMDIR=/usr/lib/X11/twm
+       $(MAKE) LIBDIR=/usr/lib TWMDIR=/usr/lib/X11/twm CC='gcc -std=gnu17'
 
 override_dh_auto_clean:
        [ ! -f Makefile ] || $(MAKE) clean