引入librtmp 报错： fatal error: ‘openssl/ssl.h’ file not found

引入librtmp 报错： fatal error: ‘openssl/ssl.h’ file not found
许多博客提示在CMAKELists 中添加，
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DNO_CRYPTO")
并不好使！
需要在build.gradle中添加才好使

externalNativeBuild {
    cmake {
        cppFlags "-std=c++14"
        cppFlags "-fexceptions"
        cFlags "-DSTDC_HEADERS"
        cFlags "-DNO_CRYPTO"
    }

    ndk {
        abiFilters "armeabi-v7a"
    }
}