cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations pthread/pthread_spin_unlock.c -o pthread/pthread_spin_unlock -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
pthread/pthread_spin_unlock.c:5:12: error: unknown type name 'pthread_spinlock_t'; did you mean 'pthread_rwlock_t'?
int (*foo)(pthread_spinlock_t *) = pthread_spin_unlock;
           ^~~~~~~~~~~~~~~~~~
           pthread_rwlock_t
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/_pthread/_pthread_rwlock_t.h:31:35: note: 'pthread_rwlock_t' declared here
typedef __darwin_pthread_rwlock_t pthread_rwlock_t;
                                  ^
pthread/pthread_spin_unlock.c:5:36: error: use of undeclared identifier 'pthread_spin_unlock'; did you mean 'pthread_mutex_unlock'?
int (*foo)(pthread_spinlock_t *) = pthread_spin_unlock;
                                   ^~~~~~~~~~~~~~~~~~~
                                   pthread_mutex_unlock
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/pthread.h:405:5: note: 'pthread_mutex_unlock' declared here
int pthread_mutex_unlock(pthread_mutex_t *);
    ^
pthread/pthread_spin_unlock.c:5:7: error: incompatible function pointer types initializing 'int (*)(pthread_rwlock_t *)' (aka 'int (*)(struct _opaque_pthread_rwlock_t *)') with an expression of type 'int (pthread_mutex_t * _Nonnull)' (aka 'int (struct _opaque_pthread_mutex_t * _Nonnull)') [-Werror,-Wincompatible-function-pointer-types]
int (*foo)(pthread_spinlock_t *) = pthread_spin_unlock;
      ^                            ~~~~~~~~~~~~~~~~~~~
3 errors generated.