Refactor: Make the libevent logic only compile if libevent is enabled ..

Author: Roy-Carter

configure.ac

@@ -8436,6 +8436,10 @@ then
     AM_CFLAGS="$AM_CFLAGS -DHAVE_EXT_CACHE -DHAVE_MEMCACHED"
 fi
 
+if test "$ENABLED_LIBEVENT" = "yes"
+then
+    AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_LIBEVENT"
+fi
 
 if test "$ENABLED_NGINX" = "yes"|| test "x$ENABLED_HAPROXY" = "xyes" || test "x$ENABLED_LIGHTY" = "xyes"
 then

wolfssl/openssl/ssl.h

@@ -132,9 +132,9 @@
 #if !defined(OPENSSL_COEXIST) && \
     (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
 
+#ifdef WOLFSSL_LIBEVENT
 /* OpenSSL struct tag compatibility: third-party code (e.g. libevent) may
- * forward-declare or reference the OpenSSL internal struct tags directly
-`. */
+ * forward-declare or reference the OpenSSL internal struct tags directly. */
 #define ssl_st              WOLFSSL
 #define ssl_ctx_st          WOLFSSL_CTX
 #define ssl_method_st       WOLFSSL_METHOD
@@ -146,6 +146,7 @@
 #define bio_method_st       WOLFSSL_BIO_METHOD
 #define buf_mem_st          WOLFSSL_BUF_MEM
 #define evp_pkey_st         WOLFSSL_EVP_PKEY
+#endif /* WOLFSSL_LIBEVENT */
 
 typedef WOLFSSL          SSL;
 typedef WOLFSSL_SESSION  SSL_SESSION;