android c 如何规避Wunused-parameter等警告错误

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1，

gps_gateway.cpp:405:35: error: unused parameter 'callbacks' [-Werror,-Wunused-parameter]

static int gps_init(GpsCallbacks* callbacks)

=》android.bp :  -Wno-unused-parameter 这个可以规避

clang_cflags: ["-Wno-c++11-extensions"],

cflags: [

        "-Wall",
        "-Wextra",
        "-Werror",
        "-Wno-unused-parameter",

    ],

2，

gps_fake.cc:84:10: error: unused variable 'pTmp' [-Werror,-Wunused-variable]

    char pTmp[256];

=》

"-Wno-unused-variable",

3，

gps_gateway.cpp:351:13: error: unused function 'gps_tty_read_thread' [-Werror,-Wunused-function]

static void gps_tty_read_thread(void * /*arg*/)

=》

"-Wno-unused-function",