$NetBSD: patch-configure.ac,v 1.1 2014/03/14 20:49:56 gdt Exp $

Patch taken from upstream post 0.13.0:
  https://github.com/OpenSC/OpenSC/commit/11ff81367af9bc9dce2cbcb550cc463552a3b69e

--- configure.ac.orig	2012-12-04 14:43:40.000000000 +0000
+++ configure.ac
@@ -286,23 +286,19 @@ AC_CHECK_LIB(
 
 if test "${WIN32}" = "no"; then
 	dnl dl support
-	AC_CHECK_LIB(
-		[dl],
-		[dlopen],
-		,
-		[AC_MSG_ERROR([libdl required])]
-	)
+	dnl https://github.com/OpenSC/OpenSC/commit/11ff81367af9bc9dce2cbcb550cc463552a3b69e
+	AC_SEARCH_LIBS([dlopen], [dl dld], [], [
+				 AC_MSG_ERROR([unable to find the dlopen() function])
+				 ])
+
+case "${host_cpu}-${host_os}" in
+        *netbsd*)
+		acx_pthread_ok=yes
+		PTHREAD_CFLAGS=""
+		PTHREAD_LIBS=""
+	;;
+esac
 
-	dnl Special check for pthread support.
-	AX_PTHREAD(
-		[AC_DEFINE(
-			[HAVE_PTHREAD],
-			[1],
-			[Define if you have POSIX threads libraries and header files.]
-		)],
-		[AC_MSG_ERROR([POSIX thread support required])]
-	)
-	CC="${PTHREAD_CC}"
 fi
 
 if test "${enable_minidriver}" = "yes"; then