Index: head/audio/fasttracker2/Makefile
===================================================================
--- head/audio/fasttracker2/Makefile	(revision 514611)
+++ head/audio/fasttracker2/Makefile	(revision 514612)
@@ -1,52 +1,62 @@
 # Created by: Emanuel Haupt <ehaupt@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	fasttracker2
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.00
 PORTREVISION=	1
 CATEGORIES=	audio
 MASTER_SITES=	https://16-bits.org/ \
 		LOCAL/ehaupt
 DISTNAME=	ft2-clone-${DISTVERSIONPREFIX}${PORTVERSION}-code
 
 MAINTAINER=	ehaupt@FreeBSD.org
 COMMENT=	Fasttracker II clone
 
 LICENSE=	BSD3CLAUSE CC-BY-NC-SA-4.0
 LICENSE_COMB=	multi
 
 LICENSE_FILE_BSD3CLAUSE=	${WRKSRC}/src/LICENSE.txt
 LICENSE_FILE_CC-BY-NC-SA-4.0=	${WRKSRC}/src/gfxdata/bmp/LICENSE.txt
 
-USES=		cmake dos2unix iconv:wchar_t localbase:ldflags sdl zip
+USES=		cmake compiler dos2unix iconv:wchar_t localbase:ldflags sdl zip
 USE_SDL=	sdl2
 
 WRKSRC=		${WRKDIR}/ft2-clone-code
 
 DESKTOP_ENTRIES="FastTracker II" \
 		"${COMMENT}" \
 		"${PREFIX}/share/pixmaps/ft2-clone.ico" \
 		"fasttracker2" \
 		"" \
 		false
 
 PLIST_FILES=	bin/fasttracker2 share/pixmaps/ft2-clone.ico
 
 OPTIONS_DEFINE=	ALSA
 OPTIONS_DEFAULT=ALSA
 
 LDFLAGS+=	-lSDL2 -lpthread -lstdc++ -lm -liconv
 
 ALSA_LIB_DEPENDS=	libasound.so:audio/alsa-lib
 ALSA_CFLAGS+=	-D__LINUX_ALSA__
 ALSA_LDFLAGS+=	-lasound
 
+CFLAGS_i386+=	-msse2
+
+.include <bsd.port.pre.mk>
+
+# clang reports:
+# error: invalid argument '-std=c99' not allowed with 'C++'
+.if ${CHOSEN_COMPILER_TYPE} == gcc
+USE_CSTD=	c99
+.endif
+
 do-install:
 	@${MKDIR} ${STAGEDIR}${PREFIX}/share/pixmaps
 	${INSTALL_PROGRAM} ${WRKSRC}/release/other/ft2-clone \
 		${STAGEDIR}${PREFIX}/bin/${PORTNAME}
 	${INSTALL_DATA} ${WRKSRC}/src/gfxdata/icon/ft2-clone.ico \
 		${STAGEDIR}${PREFIX}/share/pixmaps
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>