Added caching option to cmake

CMakeLists.txt

@@ -26,6 +26,9 @@ target_compile_features(project_options INTERFACE cxx_std_17)
 
 add_library(project_warnings INTERFACE)
 
+# enable cache system
+include(cmake/Cache.cmake)
+
 # standard compiler warnings
 include(cmake/CompilerWarnings.cmake)
 # set_project_warnings(project_warnings)

cmake/Cache.cmake

@@ -0,0 +1,30 @@
+option(ENABLE_CACHE "Enable cache if available" ON)
+if(NOT ENABLE_CACHE)
+  return()
+endif()
+
+set(CACHE_OPTION
+    "ccache"
+    CACHE STRING "Compiler cache to be used")
+set(CACHE_OPTION_VALUES "ccache" "sccache")
+set_property(CACHE CACHE_OPTION PROPERTY STRINGS ${CACHE_OPTION_VALUES})
+list(
+  FIND
+  CACHE_OPTION_VALUES
+  ${CACHE_OPTION}
+  CACHE_OPTION_INDEX)
+
+if(${CACHE_OPTION_INDEX} EQUAL -1)
+  message(
+    STATUS
+      "Using custom compiler cache system: '${CACHE_OPTION}', explicitly supported entries are ${CACHE_OPTION_VALUES}")
+endif()
+
+find_program(CACHE_BINARY ${CACHE_OPTION})
+if(CACHE_BINARY)
+  message(STATUS "${CACHE_OPTION} found and enabled")
+  set(CMAKE_CXX_COMPILER_LAUNCHER ${CACHE_BINARY})
+else()
+  message(WARNING "${CACHE_OPTION} is enabled but was not found. Not using it")
+endif()
+