Suppress OpenSSL deprecated function warnings

Many ENGINE, EVP_PKEY and EC functions are deprecated in OpenSSL 3.0.
Excessive warnings make it hard to spot issues that really require
our attention.

examples/auth.c

@@ -45,6 +45,10 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <string.h>
+
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <libp11.h>
 
 #define RANDOM_SOURCE "/dev/urandom"

examples/decrypt.c

@@ -45,6 +45,10 @@
 #endif
 #include <stdio.h>
 #include <string.h>
+
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <libp11.h>
 
 #define RANDOM_SOURCE "/dev/urandom"

tests/check-privkey.c

@@ -21,6 +21,9 @@
 #include <unistd.h>
 #include <string.h>
 
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <openssl/engine.h>
 #include <openssl/conf.h>
 #include <openssl/evp.h>

tests/dup-key.c

@@ -23,6 +23,9 @@
 #include <unistd.h>
 #include <string.h>
 
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <openssl/engine.h>
 #include <openssl/conf.h>
 #include <openssl/evp.h>

tests/evp-sign.c

@@ -33,6 +33,10 @@
 #include <getopt.h>
 #include <err.h>
 #include <arpa/inet.h>
+
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <openssl/evp.h>
 #include <openssl/pem.h>
 #include <openssl/err.h>

tests/fork-change-slot.c

@@ -54,6 +54,9 @@
 #include <unistd.h>
 #include <signal.h>
 
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <openssl/evp.h>
 #include <openssl/conf.h>
 #include <openssl/engine.h>

tests/rsa-oaep.c

@@ -29,6 +29,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <openssl/rsa.h>
 #include <openssl/evp.h>
 #include <openssl/pem.h>

tests/rsa-pss-sign.c

@@ -29,6 +29,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <openssl/rsa.h>
 #include <openssl/evp.h>
 #include <openssl/pem.h>

tests/store-cert.c

@@ -18,11 +18,15 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+#include <string.h>
+
+/* this code extensively uses deprecated features, so warnings are useless */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
 #include <libp11.h>
 #include <openssl/conf.h>
 #include <openssl/engine.h>
 #include <openssl/pem.h>
-#include <string.h>
 
 static void
 usage(char* argv[])