$ make cc -c -pipe -fPIC -fvisibility=hidden -O -W -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wmissing-prototypes -Werror -g -I src -I build -I/opt/openssl/include \ \ \ -o build/src/nxt_openssl.o \ -MMD -MF build/src/nxt_openssl.dep -MT build/src/nxt_openssl.o \ src/nxt_openssl.c src/nxt_openssl.c: In function 'nxt_tls_ticket_key_callback': src/nxt_openssl.c:820:5: error: 'HMAC_Init_ex' is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations] 820 | if (HMAC_Init_ex(hctx, ticket[i].hmac_key, ticket[i].size, digest, NULL) | ^~ In file included from /opt/openssl/include/openssl/ssl.h:37, from src/nxt_openssl.c:9: /opt/openssl/include/openssl/hmac.h:43:27: note: declared here 43 | OSSL_DEPRECATEDIN_3_0 int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, | ^~~~~~~~~~~~ src/nxt_openssl.c: In function 'nxt_openssl_copy_error': src/nxt_openssl.c:1784:9: error: 'ERR_get_error_line_data' is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations] 1784 | err = ERR_get_error_line_data(NULL, NULL, &data, &flags); | ^~~ In file included from src/nxt_openssl.c:11: /opt/openssl/include/openssl/err.h:413:15: note: declared here 413 | unsigned long ERR_get_error_line_data(const char **file, int *line, | ^~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors make: *** [build/Makefile:1375: build/src/nxt_openssl.o] Error 1