Conditionalize the inclusion of the -fnested-functions flag on GCC.

Approved by:		portmgr (tier-2 blanket)
Differential Revision:	D22026

mail/milter-callback/Makefile

@@ -14,7 +14,7 @@ LICENSE=	GPLv3
 
 LIB_DEPENDS=	libspf2.so:mail/libspf2
 
-USES=		tar:xz
+USES=		compiler tar:xz
 USE_RC_SUBR=	milter-callback
 USE_GCC=	any
 
@@ -26,14 +26,14 @@ SRC_FILES=	cache.c commonprocs.c cpit.c dealwithmxes.c detectlamespf.c \
 
 CFLAGS+=	-DFREEBSD -DHAVE_NS_TYPE -DWITH_SPF -I${LOCALBASE}/include \
 		-I${WRKSRC} -std=gnu99
-CFLAGS_mips=	-fnested-functions
-CFLAGS_mips64=	-fnested-functions
-CFLAGS_powerpc=	-fnested-functions
-CFLAGS_powerpcspe=	-fnested-functions
-CFLAGS_powerpc64=	-fnested-functions
-CFLAGS_sparc64=	-fnested-functions
 LDFLAGS+=	-lmilter -lthr -L${LOCALBASE}/lib -lspf2
 
+.include <bsd.port.pre.mk>
+
+.if ${CHOSEN_COMPILER_TYPE} == gcc && ${COMPILER_VERSION} <= 42
+CFLAGS+=	-fnested-functions
+.endif
+
 do-build:
 .for f in ${SRC_FILES}
 	${CC} ${CFLAGS} -c ${WRKSRC}/${f} -o ${WRKSRC}/${f:C/\.c/.o/}
@@ -57,4 +57,4 @@ do-install:
 	${INSTALL_DATA} ${WRKSRC}/${PORTNAME}.conf \
 		${STAGEDIR}${PREFIX}/etc/mail/${PORTNAME}.conf.sample
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>