ext/rbs_extension/extconf.rb in rbs-2.3.1 vs ext/rbs_extension/extconf.rb in rbs-2.3.2

@@ -1,4 +1,4 @@
 require 'mkmf'
 $INCFLAGS << " -I$(top_srcdir)" if $extmk
-append_cflags ['-std=c99', '-Wold-style-definition']
+$CFLAGS += " -std=c99 "
 create_makefile 'rbs_extension'