Build zstandard with threading enabled

lib/libzstd/Makefile

@@ -22,7 +22,9 @@ SRCS=	entropy_common.c \
 	zdict.c
 WARNS=	2
 INCS=	zstd.h
-CFLAGS+=	-I${ZSTDDIR}/lib -I${ZSTDDIR}/lib/common -DXXH_NAMESPACE=ZSTD_
+CFLAGS+=	-I${ZSTDDIR}/lib -I${ZSTDDIR}/lib/common -DXXH_NAMESPACE=ZSTD_ \
+		-DZSTD_MULTITHREAD=1
+LIBADD=	pthread
 
 PRIVATELIB=	yes
 

share/mk/src.libnames.mk

@@ -209,6 +209,7 @@ _LIBRARIES+= \
 # 2nd+ order consumers.  Auto-generating this would be better.
 _DP_80211=	sbuf bsdxml
 _DP_archive=	z bz2 lzma bsdxml
+_DP_zstd=	pthread
 .if ${MK_BLACKLIST} != "no"
 _DP_blacklist+=	pthread
 .endif

usr.bin/zstd/Makefile

@@ -13,7 +13,8 @@ CFLAGS+=	-I${SRCTOP}/contrib/zstd/programs \
 		-I${SRCTOP}/contrib/zstd/lib/dictBuilder \
 		-I${SRCTOP}/contrib/zstd/lib \
 		-DXXH_NAMESPACE=ZSTD_ \
-		-DHAVE_THREAD=1
+		-DHAVE_THREAD=1 \
+		-DZSTD_MULTITHREAD=1
 SCRIPTS=	zstdgrep
 LINKS=	${BINDIR}/zstd ${BINDIR}/unzstd \
 	${BINDIR}/zstd ${BINDIR}/zstdcat \