lua autofoo:

- Fail if with-lua was given but liblualib is missing
- Make the test for liblualib succeed on my system
  (make sure the test gets linked with liblua and libm).

svn path=/trunk/; revision=17198

acinclude.m4

@@ -833,6 +833,7 @@ AC_DEFUN([AC_ETHEREAL_LIBLUA_CHECK],[
 			#
 			# we got lua, now look for lualib
 			#
+			LIBS="$LIBS $LUA_LIBS -lm"
 
 			AC_CHECK_LIB(lualib, luaopen_base,
 			[
@@ -852,6 +853,11 @@ AC_DEFUN([AC_ETHEREAL_LIBLUA_CHECK],[
 					LIBS="$ethereal_save_LIBS"
 					LUA_LIBS=""
 				fi
+				# User requested --with-lua but it isn't available
+				if test "x$want_lua" = "xyes"
+				then
+					AC_MSG_ERROR(Linking with liblualib failed.)
+				fi
 				want_lua=no
 			])
 		],[  
@@ -866,10 +872,14 @@ AC_DEFUN([AC_ETHEREAL_LIBLUA_CHECK],[
 			LDFLAGS="$ethereal_save_LDFLAGS"
 			LIBS="$ethereal_save_LIBS"
 			LUA_LIBS=""
+			# User requested --with-lua but it isn't available
+			if test "x$want_lua" = "xyes"
+			then
+				AC_MSG_ERROR(Linking with liblua failed.)
+			fi
 			want_lua=no
 		])
 	
-	
 	CPPFLAGS="$ethereal_save_CPPFLAGS"
 	LDFLAGS="$ethereal_save_LDFLAGS"
 	LIBS="$ethereal_save_LIBS"

configure.in

@@ -771,7 +771,7 @@ dnl lua check
 AC_MSG_CHECKING(whether to use liblua for the lua scripting plugin)
 
 AC_ARG_WITH(lua,
-[  --with-lua[[=DIR]]       use liblua (located in directory DIR, if supplied) for the lua scripting plugin.  [[default=no]]],
+[  --with-lua[[=DIR]]        use liblua (located in directory DIR, if supplied) for the lua scripting plugin.  [[default=no]]],
 [
 	if test $withval = no
 	then
@@ -785,7 +785,7 @@ AC_ARG_WITH(lua,
 	fi
 ],[
 	#
-	# Use liblua if it's present, otherwise don't.
+	# Don't use liblua by default (it isn't ready yet)
 	#
 	want_lua=no
 	lua_dir=