cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations pthread/pthread_spin_init.c -o pthread/pthread_spin_init -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
pthread/pthread_spin_init.c:5:12: error: unknown type name 'pthread_spinlock_t'; did you mean 'pthread_rwlock_t'?
int (*foo)(pthread_spinlock_t *, int) = pthread_spin_init;
           ^~~~~~~~~~~~~~~~~~
           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_init.c:5:41: error: use of undeclared identifier 'pthread_spin_init'
int (*foo)(pthread_spinlock_t *, int) = pthread_spin_init;
                                        ^
2 errors generated.