Index: head/multimedia/libva/Makefile
===================================================================
--- head/multimedia/libva/Makefile	(revision 506328)
+++ head/multimedia/libva/Makefile	(revision 506329)
@@ -1,41 +1,45 @@
 # $FreeBSD$
 
 PORTNAME=	libva
 PORTVERSION=	2.5.0
 CATEGORIES=	multimedia
 
 PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${GH_PROJECT}/commit/
 PATCHFILES+=	c2a431cc3cab.patch:-p1 5cfcd31635b1.patch:-p1
 
 MAINTAINER=	jbeich@FreeBSD.org
 COMMENT?=	VAAPI wrapper and dummy driver
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS+=	libdrm.so:graphics/libdrm
 
 USES=		meson pkgconfig
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 GH_ACCOUNT=	intel
-LDFLAGS+=	-lpthread # for pthread_getthreadid_np
+# -lpthread is not necessary if pthread_getthreadid_np is a libc stub
+LDFLAGS+=	${LDFLAGS_${OPSYS}_${OSREL}}
+LDFLAGS_FreeBSD_11.2=	-lpthread
+LDFLAGS_FreeBSD_11.3=	-lpthread
+LDFLAGS_FreeBSD_12.0=	-lpthread
 
 OPTIONS_DEFINE=	GLX WAYLAND X11
 OPTIONS_DEFAULT=GLX WAYLAND X11
 OPTIONS_EXCLUDE?=GLX # enslaved until subpackaging
 OPTIONS_SUB=	yes
 
 GLX_LIB_DEPENDS=	libva-x11.so:multimedia/libva
 GLX_USES=		gl
 GLX_USE=		GL=gl
 GLX_MESON_YES=		with_glx
 GLX_IMPLIES=		X11
 
 WAYLAND_LIB_DEPENDS=	libwayland-client.so:graphics/wayland
 WAYLAND_MESON_YES=	with_wayland
 
 X11_USE=		XORG=x11,xorgproto,xext,xfixes
 X11_MESON_YES=		with_x11
 
 .include <bsd.port.mk>