I get warnings on all my ASN1_SEQUENCE_END, a missing prototype for the _it functions. The code is working, but I'd like a clean compile. 3.0.0 only, 1.0.2 and 1.1.1 are OK. Example: #include <openssl/asn1.h> #include <openssl/asn1t.h> #include <openssl/x509.h> #include <openssl/x509v3.h> typedef struct { ASN1_TIME *notBefore; ASN1_TIME *notAfter; } TPM_PARTIAL_CERT_VALIDITY; ASN1_SEQUENCE(TPM_PARTIAL_CERT_VALIDITY) = { ASN1_SIMPLE(TPM_PARTIAL_CERT_VALIDITY, notBefore, ASN1_TIME), ASN1_SIMPLE(TPM_PARTIAL_CERT_VALIDITY, notAfter, ASN1_TIME), } ASN1_SEQUENCE_END(TPM_PARTIAL_CERT_VALIDITY) <<<< line 97 is here certifyx509.c:97: warning: no previous prototype for 'TPM_PARTIAL_CERT_VALIDITY_it'