Question

/toolchain/arm-buildroot-linux-gnueabihf_sdk-buildroot/arm-buildroot-linux-gnueabihf/sysroot/usr/include/pthread.h:967:33: error: unknown type name 'pthread_rwlock_t'
extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
                                ^

Answer

Remove below line:

#include <bits/pthreadtypes.h>