Merge 881dd54 into 1817e30

CMakeLists.txt

@@ -8,6 +8,25 @@ cmake_policy(SET CMP0025 NEW)
 
 project(dronecode_sdk)
 
+# ccache
+option(CCACHE "Use ccache if available" ON)
+find_program(CCACHE_PROGRAM ccache)
+if (CCACHE AND CCACHE_PROGRAM AND NOT DEFINED ENV{CCACHE_DISABLE})
+
+	get_filename_component(ccache_real_path ${CCACHE_PROGRAM} REALPATH)
+	get_filename_component(cxx_real_path ${CMAKE_CXX_COMPILER} REALPATH)
+	get_filename_component(cxx_abs_path ${CMAKE_CXX_COMPILER} ABSOLUTE)
+
+	if ("${ccache_real_path}" STREQUAL "${cxx_real_path}")
+		message(STATUS "ccache enabled via symlink (${cxx_abs_path} -> ${cxx_real_path})")
+	else()
+		message(STATUS "ccache enabled (export CCACHE_DISABLE=1 to disable)")
+		set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
+	endif()
+
+endif()
+
+
 option(BUILD_TESTS "Build tests" ON)
 
 include(cmake/compiler_flags.cmake)