Use void in all function definitions that do not take any arguments Reviewed-by: Rich Salz <rsalz@openssl.org> GH: #6208

diff --git a/apps/apps.c b/apps/apps.c
index b35ea56..d5a6aea 100644
--- a/apps/apps.c
+++ b/apps/apps.c

@@ -2486,7 +2486,7 @@
     return b;
 }
 
-void destroy_prefix_method()
+void destroy_prefix_method(void)
 {
     BIO_meth_free(prefix_method);
     prefix_method = NULL;

diff --git a/apps/openssl.c b/apps/openssl.c
index 8224ae3..a872e2c 100644
--- a/apps/openssl.c
+++ b/apps/openssl.c

@@ -74,7 +74,7 @@
     dc->columns = (80 - 1) / dc->width;
 }
 
-static int apps_startup()
+static int apps_startup(void)
 {
 #ifdef SIGPIPE
     signal(SIGPIPE, SIG_IGN);
@@ -90,13 +90,13 @@
     return 1;
 }
 
-static void apps_shutdown()
+static void apps_shutdown(void)
 {
     destroy_ui_method();
     destroy_prefix_method();
 }
 
-static char *make_config_name()
+static char *make_config_name(void)
 {
     const char *t;
     size_t len;

diff --git a/crypto/bio/bio_meth.c b/crypto/bio/bio_meth.c
index 21df94a..493ff63 100644
--- a/crypto/bio/bio_meth.c
+++ b/crypto/bio/bio_meth.c

@@ -19,7 +19,7 @@
     return bio_type_lock != NULL;
 }
 
-int BIO_get_new_index()
+int BIO_get_new_index(void)
 {
     static CRYPTO_REF_COUNT bio_count = BIO_TYPE_START;
     int newval;

diff --git a/crypto/conf/conf_def.c b/crypto/conf/conf_def.c
index aa9f2fa..7340a91 100644
--- a/crypto/conf/conf_def.c
+++ b/crypto/conf/conf_def.c

@@ -85,12 +85,12 @@
     def_load
 };
 
-CONF_METHOD *NCONF_default()
+CONF_METHOD *NCONF_default(void)
 {
     return &default_method;
 }
 
-CONF_METHOD *NCONF_WIN32()
+CONF_METHOD *NCONF_WIN32(void)
 {
     return &WIN32_method;
 }

diff --git a/crypto/ct/ct_log.c b/crypto/ct/ct_log.c
index d442322..4e5c109 100644
--- a/crypto/ct/ct_log.c
+++ b/crypto/ct/ct_log.c

@@ -54,7 +54,7 @@
  */
 static void ctlog_store_load_ctx_free(CTLOG_STORE_LOAD_CTX* ctx);
 
-static CTLOG_STORE_LOAD_CTX *ctlog_store_load_ctx_new()
+static CTLOG_STORE_LOAD_CTX *ctlog_store_load_ctx_new(void)
 {
     CTLOG_STORE_LOAD_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
 

diff --git a/crypto/engine/tb_cipher.c b/crypto/engine/tb_cipher.c
index ac49141..45d754f 100644
--- a/crypto/engine/tb_cipher.c
+++ b/crypto/engine/tb_cipher.c

@@ -34,7 +34,7 @@
     return 1;
 }
 
-void ENGINE_register_all_ciphers()
+void ENGINE_register_all_ciphers(void)
 {
     ENGINE *e;
 

diff --git a/crypto/engine/tb_dh.c b/crypto/engine/tb_dh.c
index c6440df..427a3f0 100644
--- a/crypto/engine/tb_dh.c
+++ b/crypto/engine/tb_dh.c

@@ -31,7 +31,7 @@
     return 1;
 }
 
-void ENGINE_register_all_DH()
+void ENGINE_register_all_DH(void)
 {
     ENGINE *e;
 

diff --git a/crypto/engine/tb_digest.c b/crypto/engine/tb_digest.c
index 194b9c7..019adcf 100644
--- a/crypto/engine/tb_digest.c
+++ b/crypto/engine/tb_digest.c

@@ -34,7 +34,7 @@
     return 1;
 }
 
-void ENGINE_register_all_digests()
+void ENGINE_register_all_digests(void)
 {
     ENGINE *e;
 

diff --git a/crypto/engine/tb_dsa.c b/crypto/engine/tb_dsa.c
index fdb80cd..90d5476 100644
--- a/crypto/engine/tb_dsa.c
+++ b/crypto/engine/tb_dsa.c

@@ -31,7 +31,7 @@
     return 1;
 }
 
-void ENGINE_register_all_DSA()
+void ENGINE_register_all_DSA(void)
 {
     ENGINE *e;
 

diff --git a/crypto/engine/tb_eckey.c b/crypto/engine/tb_eckey.c
index 75750b2..713fdc5 100644
--- a/crypto/engine/tb_eckey.c
+++ b/crypto/engine/tb_eckey.c

@@ -31,7 +31,7 @@
     return 1;
 }
 
-void ENGINE_register_all_EC()
+void ENGINE_register_all_EC(void)
 {
     ENGINE *e;
 

diff --git a/crypto/engine/tb_pkmeth.c b/crypto/engine/tb_pkmeth.c
index 2e82d85..e6c7ad2 100644
--- a/crypto/engine/tb_pkmeth.c
+++ b/crypto/engine/tb_pkmeth.c

@@ -35,7 +35,7 @@
     return 1;
 }
 
-void ENGINE_register_all_pkey_meths()
+void ENGINE_register_all_pkey_meths(void)
 {
     ENGINE *e;
 

diff --git a/crypto/engine/tb_rand.c b/crypto/engine/tb_rand.c
index 225e7c8..759d2f7 100644
--- a/crypto/engine/tb_rand.c
+++ b/crypto/engine/tb_rand.c

@@ -31,7 +31,7 @@
     return 1;
 }
 
-void ENGINE_register_all_RAND()
+void ENGINE_register_all_RAND(void)
 {
     ENGINE *e;
 

diff --git a/crypto/engine/tb_rsa.c b/crypto/engine/tb_rsa.c
index e2cc680..5c523d6 100644
--- a/crypto/engine/tb_rsa.c
+++ b/crypto/engine/tb_rsa.c

@@ -31,7 +31,7 @@
     return 1;
 }
 
-void ENGINE_register_all_RSA()
+void ENGINE_register_all_RSA(void)
 {
     ENGINE *e;
 

diff --git a/crypto/mem_sec.c b/crypto/mem_sec.c
index 1c13270..959c637 100644
--- a/crypto/mem_sec.c
+++ b/crypto/mem_sec.c

@@ -92,7 +92,7 @@
 #endif /* IMPLEMENTED */
 }
 
-int CRYPTO_secure_malloc_done()
+int CRYPTO_secure_malloc_done(void)
 {
 #ifdef IMPLEMENTED
     if (secure_mem_used == 0) {
@@ -106,7 +106,7 @@
     return 0;
 }
 
-int CRYPTO_secure_malloc_initialized()
+int CRYPTO_secure_malloc_initialized(void)
 {
 #ifdef IMPLEMENTED
     return secure_mem_initialized;
@@ -209,7 +209,7 @@
 #endif /* IMPLEMENTED */
 }
 
-size_t CRYPTO_secure_used()
+size_t CRYPTO_secure_used(void)
 {
 #ifdef IMPLEMENTED
     return secure_mem_used;
@@ -500,7 +500,7 @@
     return 0;
 }
 
-static void sh_done()
+static void sh_done(void)
 {
     OPENSSL_free(sh.freelist);
     OPENSSL_free(sh.bittable);

diff --git a/crypto/poly1305/poly1305.c b/crypto/poly1305/poly1305.c
index e3eb5da..1d18236 100644
--- a/crypto/poly1305/poly1305.c
+++ b/crypto/poly1305/poly1305.c

@@ -14,7 +14,7 @@
 #include "internal/poly1305.h"
 #include "poly1305_local.h"
 
-size_t Poly1305_ctx_size ()
+size_t Poly1305_ctx_size(void)
 {
     return sizeof(struct poly1305_context);
 }

diff --git a/crypto/rand/drbg_lib.c b/crypto/rand/drbg_lib.c
index 60ddd2f..729b49c 100644
--- a/crypto/rand/drbg_lib.c
+++ b/crypto/rand/drbg_lib.c

@@ -921,7 +921,7 @@
     }
 }
 
-void drbg_delete_thread_state()
+void drbg_delete_thread_state(void)
 {
     RAND_DRBG *drbg;
 

diff --git a/crypto/rand/rand_lib.c b/crypto/rand/rand_lib.c
index 050c9d2..1a9a7d2 100644
--- a/crypto/rand/rand_lib.c
+++ b/crypto/rand/rand_lib.c

@@ -303,7 +303,7 @@
     OPENSSL_secure_clear_free(out, outlen);
 }
 
-void rand_fork()
+void rand_fork(void)
 {
     rand_fork_count++;
 }

diff --git a/crypto/store/store_init.c b/crypto/store/store_init.c
index 4b53108..4d0ff01 100644
--- a/crypto/store/store_init.c
+++ b/crypto/store/store_init.c

@@ -18,7 +18,7 @@
         && ossl_store_file_loader_init();
 }
 
-int ossl_store_init_once()
+int ossl_store_init_once(void)
 {
     if (!RUN_ONCE(&store_init, do_store_init)) {
         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INIT_ONCE, ERR_R_MALLOC_FAILURE);

diff --git a/crypto/ts/ts_rsp_sign.c b/crypto/ts/ts_rsp_sign.c
index ed45c00..1b2b84e 100644
--- a/crypto/ts/ts_rsp_sign.c
+++ b/crypto/ts/ts_rsp_sign.c

@@ -117,7 +117,7 @@
 
 /* TS_RESP_CTX management functions. */
 
-TS_RESP_CTX *TS_RESP_CTX_new()
+TS_RESP_CTX *TS_RESP_CTX_new(void)
 {
     TS_RESP_CTX *ctx;
 

diff --git a/crypto/x509/x509_lu.c b/crypto/x509/x509_lu.c
index fbeed01..639a3df 100644
--- a/crypto/x509/x509_lu.c
+++ b/crypto/x509/x509_lu.c

@@ -391,7 +391,7 @@
     return a->type;
 }
 
-X509_OBJECT *X509_OBJECT_new()
+X509_OBJECT *X509_OBJECT_new(void)
 {
     X509_OBJECT *ret = OPENSSL_zalloc(sizeof(*ret));
 

diff --git a/ssl/pqueue.c b/ssl/pqueue.c
index 29804ec..548a7a4 100644
--- a/ssl/pqueue.c
+++ b/ssl/pqueue.c

@@ -35,7 +35,7 @@
     OPENSSL_free(item);
 }
 
-pqueue *pqueue_new()
+pqueue *pqueue_new(void)
 {
     pqueue *pq = OPENSSL_zalloc(sizeof(*pq));
 

diff --git a/test/asynciotest.c b/test/asynciotest.c
index 54961b2..73e415f 100644
--- a/test/asynciotest.c
+++ b/test/asynciotest.c

@@ -42,7 +42,7 @@
     unsigned int wctr;
 };
 
-static const BIO_METHOD *bio_f_async_filter()
+static const BIO_METHOD *bio_f_async_filter(void)
 {
     if (methods_async == NULL) {
         methods_async = BIO_meth_new(BIO_TYPE_ASYNC_FILTER, "Async filter");

diff --git a/test/asynctest.c b/test/asynctest.c
index eef3c32..c2740e6 100644
--- a/test/asynctest.c
+++ b/test/asynctest.c

@@ -87,7 +87,7 @@
     return 1;
 }
 
-static int test_ASYNC_init_thread()
+static int test_ASYNC_init_thread(void)
 {
     ASYNC_JOB *job1 = NULL, *job2 = NULL, *job3 = NULL;
     int funcret1, funcret2, funcret3;
@@ -123,7 +123,7 @@
     return 1;
 }
 
-static int test_ASYNC_start_job()
+static int test_ASYNC_start_job(void)
 {
     ASYNC_JOB *job = NULL;
     int funcret;
@@ -151,7 +151,7 @@
     return 1;
 }
 
-static int test_ASYNC_get_current_job()
+static int test_ASYNC_get_current_job(void)
 {
     ASYNC_JOB *job = NULL;
     int funcret;
@@ -178,7 +178,7 @@
     return 1;
 }
 
-static int test_ASYNC_WAIT_CTX_get_all_fds()
+static int test_ASYNC_WAIT_CTX_get_all_fds(void)
 {
     ASYNC_JOB *job = NULL;
     int funcret;
@@ -245,7 +245,7 @@
     return 1;
 }
 
-static int test_ASYNC_block_pause()
+static int test_ASYNC_block_pause(void)
 {
     ASYNC_JOB *job = NULL;
     int funcret;

diff --git a/test/cipherlist_test.c b/test/cipherlist_test.c
index b224983..5023c1c 100644
--- a/test/cipherlist_test.c
+++ b/test/cipherlist_test.c

@@ -215,7 +215,7 @@
     return result;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(test_default_cipherlist_implicit);
     ADD_TEST(test_default_cipherlist_explicit);

diff --git a/test/drbgtest.c b/test/drbgtest.c
index d69456b..c1887d6 100644
--- a/test/drbgtest.c
+++ b/test/drbgtest.c

@@ -554,7 +554,7 @@
 }
 
 /* Resets all drbg hook contexts */
-static void reset_drbg_hook_ctx()
+static void reset_drbg_hook_ctx(void)
 {
     reset_hook_ctx(&master_ctx);
     reset_hook_ctx(&public_ctx);

diff --git a/test/dtls_mtu_test.c b/test/dtls_mtu_test.c
index dff65a7..8e385b0 100644
--- a/test/dtls_mtu_test.c
+++ b/test/dtls_mtu_test.c

@@ -189,7 +189,7 @@
     return ret;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(run_mtu_tests);
     return 1;

diff --git a/test/dtlsv1listentest.c b/test/dtlsv1listentest.c
index 807bb6d..5331c3b 100644
--- a/test/dtlsv1listentest.c
+++ b/test/dtlsv1listentest.c

@@ -348,7 +348,7 @@
 }
 #endif
 
-int setup_tests()
+int setup_tests(void)
 {
 #ifndef OPENSSL_NO_SOCK
     ADD_ALL_TESTS(dtls_listen_test, (int)OSSL_NELEM(testpackets));

diff --git a/test/evp_test.c b/test/evp_test.c
index b36f25e..e2274d9 100644
--- a/test/evp_test.c
+++ b/test/evp_test.c

@@ -2378,7 +2378,7 @@
 /*
  * Is the key type an unsupported algorithm?
  */
-static int key_unsupported()
+static int key_unsupported(void)
 {
     long err = ERR_peek_error();
 

diff --git a/test/exdatatest.c b/test/exdatatest.c
index 0ded7db..6e90752 100644
--- a/test/exdatatest.c
+++ b/test/exdatatest.c

@@ -127,7 +127,7 @@
     int st;
 } MYOBJ;
 
-static MYOBJ *MYOBJ_new()
+static MYOBJ *MYOBJ_new(void)
 {
     static int count = 0;
     MYOBJ *obj = OPENSSL_malloc(sizeof(*obj));

diff --git a/test/generate_buildtest.pl b/test/generate_buildtest.pl
index 0a9d879..7d55362 100644
--- a/test/generate_buildtest.pl
+++ b/test/generate_buildtest.pl

@@ -27,7 +27,7 @@
 # include <openssl/$name.h>
 #endif
 
-int main()
+int main(void)
 {
     return 0;
 }

diff --git a/test/handshake_helper.c b/test/handshake_helper.c
index 9b781b0..fc5fcd6 100644
--- a/test/handshake_helper.c
+++ b/test/handshake_helper.c

@@ -22,7 +22,7 @@
 #include "handshake_helper.h"
 #include "testutil.h"
 
-HANDSHAKE_RESULT *HANDSHAKE_RESULT_new()
+HANDSHAKE_RESULT *HANDSHAKE_RESULT_new(void)
 {
     HANDSHAKE_RESULT *ret;
 

diff --git a/test/mdc2_internal_test.c b/test/mdc2_internal_test.c
index 64aa2dc..a5c4ebc 100644
--- a/test/mdc2_internal_test.c
+++ b/test/mdc2_internal_test.c

@@ -64,7 +64,7 @@
     return 1;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_ALL_TESTS(test_mdc2, OSSL_NELEM(tests));
     return 1;

diff --git a/test/modes_internal_test.c b/test/modes_internal_test.c
index 18c0977..e0f1adf 100644
--- a/test/modes_internal_test.c
+++ b/test/modes_internal_test.c

@@ -99,7 +99,7 @@
     CTS128_TEST_VECTOR(64),
 };
 
-static AES_KEY *cts128_encrypt_key_schedule()
+static AES_KEY *cts128_encrypt_key_schedule(void)
 {
     static int init_key = 1;
     static AES_KEY ks;
@@ -111,7 +111,7 @@
     return &ks;
 }
 
-static AES_KEY *cts128_decrypt_key_schedule()
+static AES_KEY *cts128_decrypt_key_schedule(void)
 {
     static int init_key = 1;
     static AES_KEY ks;

diff --git a/test/pkey_meth_kdf_test.c b/test/pkey_meth_kdf_test.c
index 5d4c468..98495b6 100644
--- a/test/pkey_meth_kdf_test.c
+++ b/test/pkey_meth_kdf_test.c

@@ -170,7 +170,7 @@
 }
 #endif
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(test_kdf_tls1_prf);
     ADD_TEST(test_kdf_hkdf);

diff --git a/test/pkey_meth_test.c b/test/pkey_meth_test.c
index 004bb30..0277013 100644
--- a/test/pkey_meth_test.c
+++ b/test/pkey_meth_test.c

@@ -75,7 +75,7 @@
     return good;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(test_asn1_meths);
     ADD_TEST(test_pkey_meths);

diff --git a/test/rdrand_sanitytest.c b/test/rdrand_sanitytest.c
index 1844d72..0e67b37 100644
--- a/test/rdrand_sanitytest.c
+++ b/test/rdrand_sanitytest.c

@@ -20,7 +20,7 @@
 size_t OPENSSL_ia32_rdrand_bytes(unsigned char *buf, size_t len);
 size_t OPENSSL_ia32_rdseed_bytes(unsigned char *buf, size_t len);
 
-void OPENSSL_cpuid_setup();
+void OPENSSL_cpuid_setup(void);
 
 extern unsigned int OPENSSL_ia32cap_P[4];
 
@@ -81,12 +81,12 @@
     return testresult;
 }
 
-static int sanity_check_rdrand_bytes()
+static int sanity_check_rdrand_bytes(void)
 {
     return sanity_check_bytes(OPENSSL_ia32_rdrand_bytes, 1000, 0, 10, 10);
 }
 
-static int sanity_check_rdseed_bytes()
+static int sanity_check_rdseed_bytes(void)
 {
     /*-
      * RDSEED may take many retries to succeed; note that this is effectively
@@ -97,7 +97,8 @@
     return sanity_check_bytes(OPENSSL_ia32_rdseed_bytes, 1000, 1, 10000, 10);
 }
 
-int setup_tests() {
+int setup_tests(void)
+{
     OPENSSL_cpuid_setup();
 
     int have_rdseed = (OPENSSL_ia32cap_P[2] & (1 << 18)) != 0;
@@ -117,7 +118,7 @@
 
 #else
 
-int setup_tests()
+int setup_tests(void)
 {
     return 1;
 }

diff --git a/test/ssl_cert_table_internal_test.c b/test/ssl_cert_table_internal_test.c
index 32ec4c8..2104e8c 100644
--- a/test/ssl_cert_table_internal_test.c
+++ b/test/ssl_cert_table_internal_test.c

@@ -76,7 +76,7 @@
     return 1;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(test_ssl_cert_table);
     return 1;

diff --git a/test/ssl_test_ctx.c b/test/ssl_test_ctx.c
index 7676966..5b427e5 100644
--- a/test/ssl_test_ctx.c
+++ b/test/ssl_test_ctx.c

@@ -709,7 +709,7 @@
     { "SessionTicketAppData", &parse_server_session_ticket_app_data },
 };
 
-SSL_TEST_CTX *SSL_TEST_CTX_new()
+SSL_TEST_CTX *SSL_TEST_CTX_new(void)
 {
     SSL_TEST_CTX *ret;
 

diff --git a/test/sslcorrupttest.c b/test/sslcorrupttest.c
index 30d3d3d..d06c8c7 100644
--- a/test/sslcorrupttest.c
+++ b/test/sslcorrupttest.c

@@ -137,7 +137,7 @@
  */
 static const char **cipher_list = NULL;
 
-static int setup_cipher_list()
+static int setup_cipher_list(void)
 {
     SSL_CTX *ctx = NULL;
     SSL *ssl = NULL;

diff --git a/test/ssltest_old.c b/test/ssltest_old.c
index 34705c3..e974f6c 100644
--- a/test/ssltest_old.c
+++ b/test/ssltest_old.c

@@ -423,7 +423,7 @@
     return 1;
 }
 
-static int verify_serverinfo()
+static int verify_serverinfo(void)
 {
     if (serverinfo_sct != serverinfo_sct_seen)
         return -1;
@@ -2836,7 +2836,7 @@
  *    $ openssl dhparam -C -noout -dsaparam 1024
  * (The third function has been renamed to avoid name conflicts.)
  */
-static DH *get_dh512()
+static DH *get_dh512(void)
 {
     static unsigned char dh512_p[] = {
         0xCB, 0xC8, 0xE1, 0x86, 0xD0, 0x1F, 0x94, 0x17, 0xA6, 0x99, 0xF0,
@@ -2870,7 +2870,7 @@
     return dh;
 }
 
-static DH *get_dh1024()
+static DH *get_dh1024(void)
 {
     static unsigned char dh1024_p[] = {
         0xF8, 0x81, 0x89, 0x7D, 0x14, 0x24, 0xC5, 0xD1, 0xE6, 0xF7, 0xBF,
@@ -2914,7 +2914,7 @@
     return dh;
 }
 
-static DH *get_dh1024dsa()
+static DH *get_dh1024dsa(void)
 {
     static unsigned char dh1024_p[] = {
         0xC8, 0x00, 0xF7, 0x08, 0x07, 0x89, 0x4D, 0x90, 0x53, 0xF3, 0xD5,

diff --git a/test/time_offset_test.c b/test/time_offset_test.c
index f3b20dd..8776559 100644
--- a/test/time_offset_test.c
+++ b/test/time_offset_test.c

@@ -106,7 +106,7 @@
     return 1;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_ALL_TESTS(test_offset, OSSL_NELEM(tests));
     return 1;

diff --git a/test/tls13ccstest.c b/test/tls13ccstest.c
index 25dc819..92e9d59 100644
--- a/test/tls13ccstest.c
+++ b/test/tls13ccstest.c

@@ -37,7 +37,7 @@
 
 static BIO_METHOD *method_watchccs = NULL;
 
-static const BIO_METHOD *bio_f_watchccs_filter()
+static const BIO_METHOD *bio_f_watchccs_filter(void)
 {
     if (method_watchccs == NULL) {
         method_watchccs = BIO_meth_new(BIO_TYPE_WATCHCCS_FILTER,

diff --git a/test/tls13secretstest.c b/test/tls13secretstest.c
index 8b775b8..313ab56 100644
--- a/test/tls13secretstest.c
+++ b/test/tls13secretstest.c

@@ -399,7 +399,7 @@
     return ret;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(test_handshake_secrets);
     return 1;

diff --git a/test/v3nametest.c b/test/v3nametest.c
index 08684ea..86f3829 100644
--- a/test/v3nametest.c
+++ b/test/v3nametest.c

@@ -251,7 +251,7 @@
     {set_altname_email, "set rfc822Name", 0, 1},
 };
 
-static X509 *make_cert()
+static X509 *make_cert(void)
 {
     X509 *crt = NULL;
 

diff --git a/test/x509_internal_test.c b/test/x509_internal_test.c
index 03bbcf2..9f351a4 100644
--- a/test/x509_internal_test.c
+++ b/test/x509_internal_test.c

@@ -57,7 +57,7 @@
     return good;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(test_standard_exts);
     return 1;

diff --git a/test/x509_time_test.c b/test/x509_time_test.c
index 5983bdf..d672a9a 100644
--- a/test/x509_time_test.c
+++ b/test/x509_time_test.c

@@ -482,7 +482,7 @@
     return ret;
 }
 
-int setup_tests()
+int setup_tests(void)
 {
     ADD_TEST(test_x509_cmp_time_current);
     ADD_ALL_TESTS(test_x509_cmp_time, OSSL_NELEM(x509_cmp_tests));