Properly set up CCACHE (which should work on windows)

CMakeLists.txt

@@ -7,12 +7,14 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 # Do not enable compiler specific extensions, for eg on GCC use -std=c++1z (=c++17) and not -std=gnu++17
 set(CMAKE_CXX_EXTENSIONS OFF)
 
-# Use ccache is available, has to be before "project()"
-find_program(CCACHE_PROGRAM ccache)
+# Use ccache if available, has to be before "project()"
+find_program(CCACHE_PROGRAM NAMES ccache sccache)
 if(CCACHE_PROGRAM)
-  # Support Unix Makefiles and Ninja
-  message(STATUS "Using CCACHE")
-  set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
+  # Support: Unix Makefiles and Ninja only
+  # RULE_LAUNCH_COMPILE is an internal variable and makes RC compilation fail on windows, hence why we use the C/CXX COMPILER_LAUNCHER instead
+  message(STATUS "${CCACHE_PROGRAM} found and enabled")
+  set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_PROGRAM} CACHE FILEPATH "CXX compiler cache used")
+  set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE_PROGRAM} CACHE FILEPATH "C compiler cache used")
 endif()
 
 # Project macro can only take digits in the version, it splits these out to specific variables