$OpenBSD: patch-configure_ac,v 1.1.1.1 2012/10/26 16:32:10 rpe Exp $
--- configure.ac.orig	Tue May 10 17:31:21 2011
+++ configure.ac	Tue Aug 21 17:56:43 2012
@@ -64,14 +64,21 @@ AC_ARG_WITH(lua, 
 	# ubuntu has lua5.1 rather than just lua
 	if pkg-config --exists lua5.1; then
 		LUALIB=lua5.1
+		LUAPC=lua5.1
+	# openbsd has liblua5.1.so but lua51.pc
+	else if pkg-config --exists lua51; then
+		LUALIB=lua5.1
+		LUAPC=lua51
 	else
 		LUALIB=lua
+		LUAPC=lua
 	fi
+	fi
 	if test -z "$LUA_HDR_DIR"; then
-		CFLAGS="$CFLAGS `pkg-config $LUALIB --cflags`"
+		CFLAGS="$CFLAGS `pkg-config $LUAPC --cflags`"
 	fi
 	LIBS="$LIBS -lm"
-	LDFLAGS="$LDFLAGS -Wl,-E -L$withval"
+	LDFLAGS="$LDFLAGS -Wl,-E `pkg-config $LUAPC --libs`"
 	AC_DEFINE(USE_LUA, , [Enable Lua])
 
 	AC_CHECK_LIB($LUALIB, luaL_newstate, , [