The build was previously working for me on OS X, but now is failing with the following error:

s2n_aead_cipher_aes_gcm.c:61:65: error: use of undeclared identifier 'EVP_CTRL_GCM_GET_TAG'
if (EVP_CIPHER_CTX_ctrl(&key->native_format.evp_cipher_ctx, EVP_CTRL_GCM_GET_TAG, S2N_TLS_GCM_TAG_LEN, tag_data) != 1) {
^
s2n_aead_cipher_aes_gcm.c:87:65: error: use of undeclared identifier 'EVP_CTRL_GCM_SET_TAG'
if (EVP_CIPHER_CTX_ctrl(&key->native_format.evp_cipher_ctx, EVP_CTRL_GCM_SET_TAG, S2N_TLS_GCM_TAG_LEN, tag_data) == 0) {
^
s2n_aead_cipher_aes_gcm.c:115:60: error: implicit declaration of function 'EVP_aes_128_gcm' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
EVP_EncryptInit_ex(&key->native_format.evp_cipher_ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
^
s2n_aead_cipher_aes_gcm.c:115:60: note: did you mean 'EVP_aes_128_ecb'?
/usr/include/openssl/evp.h:758:19: note: 'EVP_aes_128_ecb' declared here
const EVP_CIPHER EVP_aes_128_ecb(void) DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER;
^
s2n_aead_cipher_aes_gcm.c:115:60: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'const EVP_CIPHER *' (aka 'const struct evp_cipher_st *') [-Werror,-Wint-conversion]
EVP_EncryptInit_ex(&key->native_format.evp_cipher_ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
^~~~~~~~~~~~~~~~~
/usr/include/openssl/evp.h:580:62: note: passing argument to parameter 'cipher' here
int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
^
s2n_aead_cipher_aes_gcm.c:116:61: error: use of undeclared identifier 'EVP_CTRL_GCM_SET_IVLEN'
EVP_CIPHER_CTX_ctrl(&key->native_format.evp_cipher_ctx, EVP_CTRL_GCM_SET_IVLEN, S2N_TLS_GCM_IV_LEN, NULL);
^
s2n_aead_cipher_aes_gcm.c:127:60: error: implicit declaration of function 'EVP_aes_256_gcm' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
EVP_EncryptInit_ex(&key->native_format.evp_cipher_ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
^
s2n_aead_cipher_aes_gcm.c:127:60: note: did you mean 'EVP_aes_256_ecb'?
/usr/include/openssl/evp.h:778:19: note: 'EVP_aes_256_ecb' declared here
const EVP_CIPHER *EVP_aes_256_ecb(void) DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER;
^
s2n_aead_cipher_aes_gcm.c:127:60: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'const EVP_CIPHER *' (aka 'const struct evp_cipher_st *') [-Werror,-Wint-conversion]
EVP_EncryptInit_ex(&key->native_format.evp_cipher_ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
^~~~~~~~~~~~~~~~~
/usr/include/openssl/evp.h:580:62: note: passing argument to parameter 'cipher' here
int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
^
s2n_aead_cipher_aes_gcm.c:128:61: error: use of undeclared identifier 'EVP_CTRL_GCM_SET_IVLEN'
EVP_CIPHER_CTX_ctrl(&key->native_format.evp_cipher_ctx, EVP_CTRL_GCM_SET_IVLEN, S2N_TLS_GCM_IV_LEN, NULL);
^
s2n_aead_cipher_aes_gcm.c:139:60: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'const EVP_CIPHER *' (aka 'const struct evp_cipher_st *') [-Werror,-Wint-conversion]
EVP_DecryptInit_ex(&key->native_format.evp_cipher_ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
^~~~~~~~~~~~~~~~~
/usr/include/openssl/evp.h:589:62: note: passing argument to parameter 'cipher' here
int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
^
s2n_aead_cipher_aes_gcm.c:140:61: error: use of undeclared identifier 'EVP_CTRL_GCM_SET_IVLEN'
EVP_CIPHER_CTX_ctrl(&key->native_format.evp_cipher_ctx, EVP_CTRL_GCM_SET_IVLEN, S2N_TLS_GCM_IV_LEN, NULL);
^
s2n_aead_cipher_aes_gcm.c:151:60: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'const EVP_CIPHER *' (aka 'const struct evp_cipher_st *') [-Werror,-Wint-conversion]
EVP_DecryptInit_ex(&key->native_format.evp_cipher_ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
^~~~~~~~~~~~~~~~~
/usr/include/openssl/evp.h:589:62: note: passing argument to parameter 'cipher' here
int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
^
s2n_aead_cipher_aes_gcm.c:152:61: error: use of undeclared identifier 'EVP_CTRL_GCM_SET_IVLEN'
EVP_CIPHER_CTX_ctrl(&key->native_format.evp_cipher_ctx, EVP_CTRL_GCM_SET_IVLEN, S2N_TLS_GCM_IV_LEN, NULL);
^
12 errors generated.
make[1]: ** [s2n_aead_cipher_aes_gcm.o] Error 1
make: *** [libs] Error 2