cc1: error: unrecognized command line option "-Wpedantic"

Index: Makefile.inc
--- Makefile.inc.orig
+++ Makefile.inc
@@ -2,7 +2,7 @@ V=2.89
 
 AR?=	ar
 CC?=	cc
-CFLAGS+=-g -Wall -Wpedantic -Wextra -Wno-unused-parameter -Werror
+CFLAGS+=-g -Wall -Wextra -Wno-unused-parameter
 INSTALL?=install
 LORDER?=lorder
 TSORT?=tsort
