diff -ru libtecla.orig/Makefile libtecla/Makefile
--- libtecla.orig/Makefile	Wed Apr 21 23:48:43 2004
+++ libtecla/Makefile	Wed Apr 21 23:56:36 2004
@@ -24,6 +24,13 @@
 	PORTNAME="${PORTNAME}"
 INSTALLS_SHLIB=	yes
 
+.include <bsd.port.pre.mk>
+.if ${OSVERSION} < 500000
+PLIST_SUB+=	THREADS="@comment "
+.else
+PLIST_SUB+=	THREADS=""
+.endif
+
 post-extract:
 	@${SETENV} ${SCRIPTS_ENV} ${SH} ${SCRIPTDIR}/genman3list.sh
 
@@ -34,4 +41,4 @@
 .include "${WRKDIRPREFIX}${.CURDIR}/Makefile.inc"
 .endif
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>
Only in libtecla.orig: libtecla-1.4.1_1.tbz
diff -ru libtecla.orig/pkg-plist libtecla/pkg-plist
--- libtecla.orig/pkg-plist	Wed Apr 21 23:48:43 2004
+++ libtecla/pkg-plist	Wed Apr 21 23:55:46 2004
@@ -2,7 +2,7 @@
 lib/libtecla.a
 lib/libtecla.so
 lib/libtecla.so.1
-lib/libtecla_r.a
-lib/libtecla_r.so
-lib/libtecla_r.so.1
+%%THREADS%%lib/libtecla_r.a
+%%THREADS%%lib/libtecla_r.so
+%%THREADS%%lib/libtecla_r.so.1
 include/libtecla.h