Minor improvements to CMake build system suggested by riebl so that we are more standard and values corectly appear in CMake GUIs

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@10919 178a84e3-b1eb-0310-8ba1-8eac791a3b58

CMakeLists.in.txt

@@ -6,12 +6,20 @@ include (CheckCXXSourceCompiles)
 
 project(SuperTuxKart)
 
+if (NOT CMAKE_BUILD_TYPE)
+    message(STATUS "No build type selected, default to Release")
+    set(CMAKE_BUILD_TYPE "Release")
+endif()
+
+
 #set(CMAKE_VERBOSE_MAKEFILE TRUE)
 
 set(STK_SOURCE_DIR "src")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "bin")
 set(PROJECT_VERSION "0.7.3")
 
+set(CMAKE_CXX_FLAGS_RELEASE -O2)
+
 # Tweakable values
 if(CMAKE_BUILD_TYPE MATCHES "Debug")
 	set(DEBUG ON)
@@ -183,7 +191,6 @@ if(DEBUG)
 	add_definitions(-DDEBUG)
 else()
 	add_definitions(-DNDEBUG)
-	add_definitions(-O2)
 endif()
 
 find_package(Freetype)