cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations spawn/posix_spawnattr_getschedpolicy.c -o spawn/posix_spawnattr_getschedpolicy -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
spawn/posix_spawnattr_getschedpolicy.c:6:64: error: use of undeclared identifier 'posix_spawnattr_getschedpolicy'; did you mean 'posix_spawnattr_getsigdefault'?
    6 | int (*foo)(const posix_spawnattr_t *restrict, int *restrict) = posix_spawnattr_getschedpolicy;
      |                                                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                                posix_spawnattr_getsigdefault
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/spawn.h:87:9: note: 'posix_spawnattr_getsigdefault' declared here
   87 | int     posix_spawnattr_getsigdefault(const posix_spawnattr_t * __restrict,
      |         ^
spawn/posix_spawnattr_getschedpolicy.c:6:7: error: incompatible function pointer types initializing 'int (*)(const posix_spawnattr_t *restrict, int *restrict)' (aka 'int (*)(void *const *restrict, int *restrict)') with an expression of type 'int (const posix_spawnattr_t *restrict, sigset_t *restrict)' (aka 'int (void *const *restrict, unsigned int *restrict)') [-Wincompatible-function-pointer-types]
    6 | int (*foo)(const posix_spawnattr_t *restrict, int *restrict) = posix_spawnattr_getschedpolicy;
      |       ^                                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.