Fedora-specific makefile patch.

--- iputils-s20121125/Makefile.orig	2012-12-05 15:30:04.000000000 +0100
+++ iputils-s20121125/Makefile	2012-12-05 15:31:50.349577490 +0100
@@ -32,7 +32,7 @@
 # -------------------------------------
 # What a pity, all new gccs are buggy and -Werror does not work. Sigh.
 # CCOPT=-fno-strict-aliasing -Wstrict-prototypes -Wall -Werror -g
-CCOPT=-fno-strict-aliasing -Wstrict-prototypes -Wall -g
+CCOPT=-fno-strict-aliasing -Wstrict-prototypes -Wall -g -Werror
 CCOPTOPT=-O3
 GLIBCFIX=-D_GNU_SOURCE
 DEFINES=
@@ -77,7 +77,7 @@
 IPV6_TARGETS=tracepath6 traceroute6 ping6
 TARGETS=$(IPV4_TARGETS) $(IPV6_TARGETS)
 
-CFLAGS=$(CCOPTOPT) $(CCOPT) $(GLIBCFIX) $(DEFINES)
+CFLAGS+=$(RPM_OPT_FLAGS) $(CCOPTOPT) $(CCOPT) $(GLIBCFIX) $(DEFINES)
 LDLIBS=$(LDLIB) $(ADDLIB)
 
 LASTTAG:=`git describe HEAD | sed -e 's/-.*//'`
@@ -146,6 +146,7 @@
 
 # -------------------------------------
 # ninfod
+ninfod: CFLAGS:=$(filter-out -Werror,$(CFLAGS))
 ninfod:
 	@set -e; \
 		if [ ! -f ninfod/Makefile ]; then \