c++初学者这个错误怎么改啊

Question

bgw/packages/MNbridge/MNbridge.cpp: In function 'int createToRildFd()':
bgw/packages/MNbridge/MNbridge.cpp:33:40: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
bgw/packages/MNbridge/MNbridge.cpp: In function 'sendAtErrnoType setupToRild()':
bgw/packages/MNbridge/MNbridge.cpp:53:21: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
bgw/packages/MNbridge/MNbridge.cpp: In function 'int main(int, char**)':
bgw/packages/MNbridge/MNbridge.cpp:163:60: warning: 'pRadio' is used uninitialized in this function [-Wuninitialized]
bgw/packages/MNbridge/MNbridge.cpp:167:22: warning: 'Q' is used uninitialized in this function [-Wuninitialized]
target thumb C++: MNbridge <= bgw/packages/MNbridge/receive.cpp
bgw/packages/MNbridge/receive.cpp: In function 'void receive_loop()':
bgw/packages/MNbridge/receive.cpp:51:40: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
bgw/packages/MNbridge/receive.cpp: In function 'android::byte* receive_message(int)':
bgw/packages/MNbridge/receive.cpp:72:32: warning: 'recvBuffer' is used uninitialized in this function [-Wuninitialized]
In file included from bgw/packages/MNbridge/receive.cpp:10:0:
bgw/packages/MNbridge/receive.h: At global scope:
bgw/packages/MNbridge/receive.h:10:13: warning: 'void android::receive_loop()' used but never defined [enabled by default]
target Executable: MNbridge (out/target/product/mf662c_512/obj/EXECUTABLES/MNbridge_intermediates/LINKED/MNbridge)
bgw/packages/MNbridge/MNbridge.cpp:188: error: undefined reference to 'android::thread_receive(void*)'
collect2: error: ld returned 1 exit status
make: *** [out/target/product/mf662c_512/obj/EXECUTABLES/MNbridge_intermediates/LINKED/MNbridge] 错误 1
make:离开目录“/home/gss/code/8909”

Answer 1

我的定义了这个函数，也包含了相关的头文件，不知道为什么还是会出错