_capsicum.c:1:26: fatal error: sys/capsicum.h: No such file or directory
 #include <sys/capsicum.h>
                          ^
compilation terminated.
_pledge.c: In function 'main':
_pledge.c:3:9: error: implicit declaration of function 'pledge' [-Werror=implicit-function-declaration]
  return pledge("stdio", NULL);
         ^~~~~~
cc1: all warnings being treated as errors
_getifaddrs_addrflags.c: In function 'main':
_getifaddrs_addrflags.c:6:18: error: 'struct ifaddrs' has no member named 'ifa_addrflags'; did you mean 'ifa_flags'?
  return (int)ifap->ifa_addrflags;
                  ^~
_arc4random.c: In function 'main':
_arc4random.c:3:14: error: implicit declaration of function 'arc4random' [-Werror=implicit-function-declaration]
  return (int)arc4random();
              ^~~~~~~~~~
cc1: all warnings being treated as errors
_arc4random_uniform.c: In function 'main':
_arc4random_uniform.c:3:14: error: implicit declaration of function 'arc4random_uniform' [-Werror=implicit-function-declaration]
  return (int)arc4random_uniform(100);
              ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
_pidfile.c:2:18: fatal error: util.h: No such file or directory
 #include <util.h>
                  ^
compilation terminated.
_setproctitle.c: In function 'main':
_setproctitle.c:4:2: error: implicit declaration of function 'setproctitle' [-Werror=implicit-function-declaration]
  setproctitle("foo");
  ^~~~~~~~~~~~
cc1: all warnings being treated as errors
_strlcpy.c: In function 'main':
_strlcpy.c:5:14: error: implicit declaration of function 'strlcpy' [-Werror=implicit-function-declaration]
  return (int)strlcpy(s2, s1, sizeof(s2));
              ^~~~~~~
cc1: all warnings being treated as errors
_strtoi.c: In function 'main':
_strtoi.c:6:14: error: implicit declaration of function 'strtoi' [-Werror=implicit-function-declaration]
  return (int)strtoi("1234", NULL, 0, 0, INT32_MAX, &e);
              ^~~~~~
cc1: all warnings being treated as errors
_consttime_memequal.c: In function 'main':
_consttime_memequal.c:3:9: error: implicit declaration of function 'consttime_memequal' [-Werror=implicit-function-declaration]
  return consttime_memequal("deadbeef", "deadbeef", 8);
         ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
_queue.c: In function 'main':
_queue.c:4:2: error: #error TAILQ_FOREACH_SAFE
 #error TAILQ_FOREACH_SAFE
  ^~~~~
_queue.c: In function 'main':
_queue.c:4:2: error: #error TAILQ_FOREACH_MUTABLE
 #error TAILQ_FOREACH_MUTABLE
  ^~~~~
_rbtree.c:1:24: fatal error: sys/rbtree.h: No such file or directory
 #include <sys/rbtree.h>
                        ^
compilation terminated.
_reallocarray.c: In function 'main':
_reallocarray.c:4:14: error: implicit declaration of function 'reallocarray' [-Werror=implicit-function-declaration]
  void *foo = reallocarray(NULL, 0, 0);
              ^~~~~~~~~~~~
_reallocarray.c:4:14: error: initialization makes pointer from integer without a cast [-Werror=int-conversion]
cc1: all warnings being treated as errors
_be64enc.c:1:24: fatal error: sys/endian.h: No such file or directory
 #include <sys/endian.h>
                        ^
compilation terminated.
_fls64.c:1:24: fatal error: sys/bitops.h: No such file or directory
 #include <sys/bitops.h>
                        ^
compilation terminated.
_md5.c:2:17: fatal error: md5.h: No such file or directory
 #include <md5.h>
                 ^
compilation terminated.
_sha256.c: In function 'main':
_sha256.c:4:2: error: unknown type name 'SHA256_CTX'
  SHA256_CTX context;
  ^~~~~~~~~~
_sha256.c:5:2: error: implicit declaration of function 'SHA256_Init' [-Werror=implicit-function-declaration]
  SHA256_Init(&context);
  ^~~~~~~~~~~
cc1: all warnings being treated as errors
_sha256.c: In function 'main':
_sha256.c:4:2: error: unknown type name 'SHA2_CTX'
  SHA2_CTX context;
  ^~~~~~~~
_sha256.c:5:2: error: implicit declaration of function 'SHA256Init' [-Werror=implicit-function-declaration]
  SHA256Init(&context);
  ^~~~~~~~~~
cc1: all warnings being treated as errors
_hmac.c:2:18: fatal error: hmac.h: No such file or directory
 #include <hmac.h>
                  ^
compilation terminated.
_hmac.c: In function 'main':
_hmac.c:3:14: error: implicit declaration of function 'hmac' [-Werror=implicit-function-declaration]
  return (int)hmac(NULL, NULL, 0, NULL, 0, NULL, 0);
              ^~~~
cc1: all warnings being treated as errors
/tmp/cc7ufNoD.o: In function `main':
_dlopen.c:(.text.startup+0x28): undefined reference to `dlopen'
_dlopen.c:(.text.startup+0x2c): undefined reference to `dlopen'
_dlopen.c:(.text.startup+0x38): undefined reference to `dlsym'
_dlopen.c:(.text.startup+0x44): undefined reference to `dlsym'
_dlopen.c:(.text.startup+0x4c): undefined reference to `dlerror'
_dlopen.c:(.text.startup+0x50): undefined reference to `dlerror'
_dlopen.c:(.text.startup+0x64): undefined reference to `dlclose'
_dlopen.c:(.text.startup+0x68): undefined reference to `dlclose'
collect2: error: ld returned 1 exit status