Merge branch 'f4exb:master' into mimo_bugfix

CMakeLists.txt

@@ -174,6 +174,16 @@ if(GIT_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git/")
     endif()
 endif()
 
+find_program(CCACHE "ccache")
+if(CCACHE)
+    set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE})
+    set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE})
+    if(APPLE)
+        set(CMAKE_OBJCXX_COMPILER_LAUNCHER ${CCACHE})
+    endif()
+    set(ENV{CCACHE_SLOPPINESS} pch_defines,time_macros)
+endif(CCACHE)
+
 set(sdrangel_VERSION "${sdrangel_VERSION_MAJOR}.${sdrangel_VERSION_MINOR}.${sdrangel_VERSION_PATCH}${sdrangel_VERSION_SUFFIX}" CACHE INTERNAL "")
 message(STATUS "${APPLICATION_NAME} Version: ${sdrangel_VERSION}")
 add_definitions("-DSDRANGEL_LIB_VERSION=\"${sdrangel_VERSION_MAJOR}.${sdrangel_VERSION_MINOR}.${sdrangel_VERSION_PATCH}\"")