Add using ccache in Linux build if installed

Author: eagleivg

CMakeLists.txt

@@ -2,9 +2,20 @@ cmake_minimum_required(VERSION 2.8.0)
 project(OpenXRay)
 
 include(${PROJECT_SOURCE_DIR}/cmake/utils.cmake)
+
 set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 
+find_program(CCACHE_FOUND ccache)
+if(CCACHE_FOUND)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
+endif(CCACHE_FOUND)
+
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive --std=c++17")
+#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive") Это на будущее
+#set(CMAKE_CXX_STANDARD 14) #Иначе ублюдочный симак добавляет -std=gnu++11 и ломает сборку
+#set(CMAKE_CXX_STANDARD_REQUIRED ON)
+#set(CMAKE_CXX_EXTENSIONS OFF)
 
 add_definitions(-D_MT -D_CPPUNWIND -DPURE_DYNAMIC_CAST -DDECLARE_SPECIALIZATION -DM_NOSTDCONTAINERS_EXT -DUSE_OGL)