libubox: lua: use pkg-config built in module to search for alternatives

Different distributions have different names for the lua 5.1 package.
Use cmake's built in pkg-config support to search for the first one,
rather than running it explicitly and searching for a single version.

Signed-off-by: Karl Palsson <karlp@remake.is>

diff --git a/lua/CMakeLists.txt b/lua/CMakeLists.txt
index 10c6dc1..34c9ab1 100644 (file)
--- a/lua/CMakeLists.txt
+++ b/lua/CMakeLists.txt
@@ -5,14 +5,7 @@ PROJECT(uloop C)
 SET(CMAKE_INSTALL_PREFIX /)
 
 IF(NOT LUA_CFLAGS)
-       FIND_PROGRAM(PKG_CONFIG pkg-config)
-       IF(PKG_CONFIG)
-               EXECUTE_PROCESS(
-                       COMMAND pkg-config --silence-errors --cflags lua5.1
-                       OUTPUT_VARIABLE LUA_CFLAGS
-                       OUTPUT_STRIP_TRAILING_WHITESPACE
-               )
-       ENDIF()
+       pkg_search_module(LUA lua5.1 lua-5.1)
 ENDIF()
 
 ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -g3 -I.. ${LUA_CFLAGS})