-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "apps.h"
-#include <openssl/bio.h>
-#include <openssl/err.h>
-#include <openssl/pem.h>
-#include <openssl/rand.h>
-#include <openssl/ts.h>
-#include <openssl/bn.h>
-
-/* Length of the nonce of the request in bits (must be a multiple of 8). */
-#define NONCE_LENGTH 64
-
-/* Macro definitions for the configuration file. */
-#define ENV_OID_FILE "oid_file"
-
-/* Local function declarations. */
+#include <openssl/opensslconf.h>
+#ifdef OPENSSL_NO_TS
+NON_EMPTY_TRANSLATION_UNIT
+#else
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+# include "apps.h"
+# include <openssl/bio.h>
+# include <openssl/err.h>
+# include <openssl/pem.h>
+# include <openssl/rand.h>
+# include <openssl/ts.h>
+# include <openssl/bn.h>
+
+/* Request nonce length, in bits (must be a multiple of 8). */
+# define NONCE_LENGTH 64
+
+/* Name of config entry that defines the OID file. */
+# define ENV_OID_FILE "oid_file"
+
+/* Is |EXACTLY_ONE| of three pointers set? */
+# define EXACTLY_ONE(a, b, c) \
+ (( a && !b && !c) || \
+ ( b && !a && !c) || \
+ ( c && !a && !b))