devel/fungw: respect CC, CFLAGS, LDFLAGS, WITH_DEBUG

Approved by:	flo (mentor)
Differential Revision: https://reviews.freebsd.org/D38678

devel/fungw/Makefile

 PORTNAME=	fungw
 DISTVERSION=	1.2.1
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	devel
 MASTER_SITES=	http://www.repo.hu/projects/fungw/releases/
 
@@ -16,6 +16,11 @@ LIB_DEPENDS=	libgenht.so:devel/genht
 USES=		gmake tar:bz2
 USE_LDCONFIG=	yes
 HAS_CONFIGURE=	yes
+CONFIGURE_ARGS=	${WITH_DEBUG:D--debug} \
+		--CC=${CC} \
+		--CFLAGS='${CFLAGS}' \
+		--LDFLAGS='${LDFLAGS}'
+
 MAKE_ARGS+=	PREFIX=${PREFIX}
 BINARY_ALIAS=	python=${PYTHON_CMD:Ufalse}