cmake - deduplicate ccache set_property code

cmake/CMakeLists.txt

@@ -27,12 +27,6 @@ endif()
 set(CMAKE_CXX_STANDARD_REQUIRED ON) # not necessary, but encouraged
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-find_program(CCACHE_FOUND ccache)
-if(CCACHE_FOUND)
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
-    message(STATUS "`ccache` is found, using it as a compiler launcher.")
-endif()
-
 add_definitions(-D_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR)
 
 if(POLICY CMP0141) # 3.25+
@@ -127,7 +121,9 @@ if((BUILD_CONVERT OR BUILD_GEOMSERVER OR BUILD_IFCPYTHON) AND(NOT BUILD_IFCGEOM)
     set(BUILD_IFCGEOM ON)
 endif()
 
+find_program(CCACHE_FOUND ccache)
 if(CCACHE_FOUND)
+    message(STATUS "`ccache` is found, using it as a compiler launcher.")
     set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_FOUND}")
     if(MSVC)
         # By default Visual Studio generators will use /Zi which is not compatible