Import("env") env.Append( CPPPATH=[ "#/lib/mbedtls", "#/lib/mbedtls/include", ], ) libenv = env.Clone(FW_LIB_NAME="mbedtls") libenv.ApplyLibFlags() sources = ["mbedtls/library/des.c", "mbedtls/library/platform_util.c"] lib = libenv.StaticLibrary("${FW_LIB_NAME}", sources) libenv.Install("${LIB_DIST_DIR}", lib) Return("lib")