Index: head/lang/ecl/Makefile
===================================================================
--- head/lang/ecl/Makefile	(revision 541327)
+++ head/lang/ecl/Makefile	(revision 541328)
@@ -1,81 +1,82 @@
 # Created by: Julian Stecklina
 # $FreeBSD$
 
 PORTNAME=	ecl
 PORTVERSION=	20.4.24
 PORTREVISION=	1
 CATEGORIES=	lang lisp
 MASTER_SITES=	https://common-lisp.net/project/ecl/static/files/release/
 
 MAINTAINER=	olgeni@FreeBSD.org
 COMMENT=	ANSI Common Lisp implementation
 
 LICENSE=	LGPL20
 
 BROKEN_aarch64=		fails to compile: error: unknown type name AO_TS_t
 BROKEN_mips=		fails to build: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
 BROKEN_mips64=		fails to build: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
 
 BUILD_DEPENDS=	${LOCALBASE}/lib/libatomic_ops.a:devel/libatomic_ops
 LIB_DEPENDS=	libgmp.so:math/gmp \
 		libgc.so:devel/boehm-gc
 
 MAKE_JOBS_UNSAFE=	yes
 USES=		autoreconf gmake localbase perl5 tar:tgz makeinfo
+USE_CSTD=	c99
 USE_PERL5=	build
 GNU_CONFIGURE=	yes
 AUTORECONF_WRKSRC=	${WRKSRC}/src
 CONFIGURE_ARGS=	--with-system-gmp \
 		--with-gmp-prefix=${LOCALBASE} \
 		--enable-boehm=system \
 		--enable-libatomic=system
 USE_LDCONFIG=	yes
 INFO=		ecl
 
 OPTIONS_DEFINE=	ASDF DFFI SAGE SOCKETS THREADS X11
 OPTIONS_DEFAULT=ASDF DFFI SAGE SOCKETS THREADS
 
 ASDF_DESC=	Enable ASDF building facility
 SAGE_DESC=	Build with patches for sage
 SOCKETS_DESC=	Enable socket interface
 DFFI_DESC=	Dynamic foreign-function support
 
 OPTIONS_SUB=	yes
 PLIST_SUB=	VERSION="${PORTVERSION}"
 
 ASDF_CONFIGURE_ON=	--with-asdf=yes
 ASDF_CONFIGURE_OFF=	--with-asdf=no
 
 X11_USES=		xorg
 X11_USE=		XORG=x11
 X11_CONFIGURE_ON=	--with-x=yes
 X11_CONFIGURE_OFF=	--with-x=no
 
 SAGE_EXTRA_PATCHES=	${PATCHDIR}/extra-patch-src_aclocal.m4 \
 			${PATCHDIR}/extra-patch-src_c_file.d \
 			${PATCHDIR}/extra-patch-src_compile.lsp.in \
 			${PATCHDIR}/extra-patch-src_configure.ac \
 			${PATCHDIR}/extra-patch-src_lsp_format.lsp \
 			${PATCHDIR}/extra-patch-src_Makefile.in
 
 SOCKETS_CONFIGURE_ON=	--with-tcp=yes
 SOCKETS_CONFIGURE_OFF=	--with-tcp=no
 
 DFFI_LIB_DEPENDS=	libffi.so:devel/libffi
 DFFI_CONFIGURE_ON=	--with-dffi=system
 DFFI_CONFIGURE_OFF=	--with-dffi=no
 
 THREADS_CONFIGURE_ON=	--enable-threads=yes
 THREADS_LDFLAGS=	-lpthread -lgc-threaded
 THREADS_LIB_DEPENDS=	libgc-threaded.so:devel/boehm-gc-threaded
 THREADS_CONFIGURE_OFF=	--enable-threads=no
 
 post-patch-THREADS-on:
 	@${REINPLACE_CMD} -e 's|-lgc|-lgc-threaded|' ${WRKSRC}/src/configure
 
 post-install:
 	${RMDIR} ${STAGEDIR}${PREFIX}/include/ecl/gc/private
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libecl.so.${PORTVERSION}
 	${LN} -sf ecl-${PORTVERSION} ${STAGEDIR}${PREFIX}/lib/ecl
 
 .include <bsd.port.mk>