Index: head/graphics/ilmbase/Makefile
===================================================================
--- head/graphics/ilmbase/Makefile	(revision 496817)
+++ head/graphics/ilmbase/Makefile	(revision 496818)
@@ -1,67 +1,69 @@
 # Created by: nork@FreeBSD.org
 # $FreeBSD$
 
 PORTNAME=	ilmbase
 PORTVERSION=	2.3.0
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	graphics devel
 MASTER_SITES=	https://github.com/openexr/openexr/releases/download/v${PORTVERSION}/
 
 MAINTAINER=	mandree@FreeBSD.org
 COMMENT=	ILM Base libraries a.k.a. Half, IlmThread, Imath, and Iex
 
 LICENSE=	BSD3CLAUSE
 
 # there are some systems that have a static /bin/bash, so
 # in order to make BUILD_DEPENDS effective, use the same absolute
 # path we will pass down through CONFIGURE_SHELL below.
 BUILD_DEPENDS=	${BASH_CMD}:shells/bash
 
 USES=		compiler:c++14-lang pkgconfig libtool
 USE_LDCONFIG=	yes
 
 GNU_CONFIGURE=	yes
 # The configure script uses bash arrays
 CONFIGURE_SHELL=${BASH_CMD}
 CONFIGURE_ARGS=	--disable-static
+MAKE_ARGS+=	PTHREAD_LIBS="-pthread -lpthread"
 TEST_TARGET=	check
 
 PORTDOCS=	AUTHORS ChangeLog README.md
 OPTIONS_DEFINE=		DOCS LARGE_STACK
 LARGE_STACK_DESC=	Enable sys-dependent large stack optimizations
 LARGE_STACK_CONFIGURE_ENABLE=	large-stack
 
 BASH_CMD=	${LOCALBASE}/bin/bash
 
 OPTIONS_SUB=	yes
 
 MAJORVER=	2_3
 VER=		24
 
 PLIST_SUB=	MAJORVER=${MAJORVER}
 PLIST_SUB+=	VER=${VER}
 
 HALF_BIN=	eLut toFloat
 
 regression-test regression check::	test
 
 post-configure:
 	${REINPLACE_CMD} -e 's/#define HAVE_UCONTEXT_H 1/#undef HAVE_UCONTEXT_H/' ${WRKSRC}/config/IlmBaseConfig.h
+	${REINPLACE_CMD} -e '/^libIlmThread_la_LIBADD/s/$$/ $$(PTHREAD_LIBS)/' ${WRKSRC}/IlmThread/Makefile
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libHalf.so.${VER}
 	${RM} ${STAGEDIR}${PREFIX}/lib/*.la
 .for l in libIex libIexMath libImath libIlmThread
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/${l}-${MAJORVER}.so.${VER}
 	@#${LN} -s ${l}-${MAJORVER}.so.${VER} ${STAGEDIR}${PREFIX}/lib/${l}.so || :
 	${LN} -s ${l}.so ${STAGEDIR}${PREFIX}/lib/${l}-${MAJORVER}.so
 .endfor
 
 .for e in ${HALF_BIN}
 	${INSTALL_PROGRAM} ${WRKSRC}/Half/${e} ${STAGEDIR}${PREFIX}/bin/${e}
 .endfor
 
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${PORTDOCS:S|^|${WRKSRC}/|} ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>