Don't need to save the value of CMAKE_REQUIRED_FLAGS or CMAKE_REQUIRED_LIBRARIES

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4467 3789f03b-4d11-0410-bbf8-ca57d06f2519

CMakeLists.txt

@@ -166,13 +166,14 @@ endif()
 find_package(JPEG REQUIRED)
 
 # Warn if it doesn't seem to be the accelerated libjpeg that's found
-set(CMAKE_REQUIRED_LIBRARIES_OLD ${CMAKE_REQUIRED_LIBRARIES})
-set(CMAKE_REQUIRED_FLAGS_OLD ${CMAKE_REQUIRED_FLAGS})
 set(CMAKE_REQUIRED_LIBRARIES ${JPEG_LIBRARIES})
 set(CMAKE_REQUIRED_FLAGS -I${JPEG_INCLUDE_DIR})
+
 check_c_source_compiles("#include <stdio.h>\n#include <jpeglib.h>\nint main(int c, char** v) { return JCS_EXT_RGBX; }" FOUND_JPEG_TURBO)
-set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES_OLD})
-set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_OLD})
+
+set(CMAKE_REQUIRED_LIBRARIES)
+set(CMAKE_REQUIRED_FLAGS)
+
 if(NOT FOUND_JPEG_TURBO)
   message(STATUS "WARNING: You are not using libjpeg-turbo. Performance will suffer.")
 endif()