Index: Makefile
===================================================================
--- Makefile	(revision 420050)
+++ Makefile	(working copy)
@@ -102,7 +102,10 @@
 		${ICONV_CONFIGURE_ARG} \
 		--with-pkgversion="FreeBSD Ports Collection" \
 		--with-system-zlib
-MAKE_ARGS+=	MAKEINFOFLAGS="--no-split"
+# On FreeBSD 11 and above AWK uses the locale's collating order which
+# runs into a bug in GCC (PR 211742).
+MAKE_ARGS+=	MAKEINFOFLAGS="--no-split" \
+		AWK="${SETENV} LC_ALL=C ${AWK:Q}"
 USE_LDCONFIG=	${TARGLIB}
 PLIST_SUB=	GCC_VERSION=${GCC_VERSION} \
 		GNU_HOST=${CONFIGURE_TARGET} \