ERR: Make OpenSSL optional until pkg-config works

Source/CTest/Curl/CMakeLists.txt

@@ -128,13 +128,17 @@ CHECK_INCLUDE_FILE_CONCAT("memory.h"         HAVE_MEMORY_H)
 CHECK_INCLUDE_FILE_CONCAT("netdb.h"          HAVE_NETDB_H)
 CHECK_INCLUDE_FILE_CONCAT("zlib.h"           HAVE_ZLIB_H)
 CHECK_INCLUDE_FILE_CONCAT("sys/poll.h"       HAVE_SYS_POLL_H)
-CHECK_INCLUDE_FILE_CONCAT("openssl/x509.h"   HAVE_OPENSSL_X509_H)
-CHECK_INCLUDE_FILE_CONCAT("openssl/engine.h" HAVE_OPENSSL_ENGINE_H)
-CHECK_INCLUDE_FILE_CONCAT("openssl/rsa.h"    HAVE_OPENSSL_RSA_H)
-CHECK_INCLUDE_FILE_CONCAT("openssl/crypto.h" HAVE_OPENSSL_CRYPTO_H)
-CHECK_INCLUDE_FILE_CONCAT("openssl/pem.h"    HAVE_OPENSSL_PEM_H)
-CHECK_INCLUDE_FILE_CONCAT("openssl/ssl.h"    HAVE_OPENSSL_SSL_H)
-CHECK_INCLUDE_FILE_CONCAT("openssl/err.h"    HAVE_OPENSSL_ERR_H)
+
+IF(CMAKE_USE_OPENSSL)
+  CHECK_INCLUDE_FILE_CONCAT("openssl/x509.h"   HAVE_OPENSSL_X509_H)
+  CHECK_INCLUDE_FILE_CONCAT("openssl/engine.h" HAVE_OPENSSL_ENGINE_H)
+  CHECK_INCLUDE_FILE_CONCAT("openssl/rsa.h"    HAVE_OPENSSL_RSA_H)
+  CHECK_INCLUDE_FILE_CONCAT("openssl/crypto.h" HAVE_OPENSSL_CRYPTO_H)
+  CHECK_INCLUDE_FILE_CONCAT("openssl/pem.h"    HAVE_OPENSSL_PEM_H)
+  CHECK_INCLUDE_FILE_CONCAT("openssl/ssl.h"    HAVE_OPENSSL_SSL_H)
+  CHECK_INCLUDE_FILE_CONCAT("openssl/err.h"    HAVE_OPENSSL_ERR_H)
+ENDIF(CMAKE_USE_OPENSSL)
+
 CHECK_INCLUDE_FILE_CONCAT("sys/socket.h"     HAVE_SYS_SOCKET_H)
 CHECK_INCLUDE_FILE_CONCAT("netinet/in.h"     HAVE_NETINET_IN_H)
 CHECK_INCLUDE_FILE_CONCAT("net/if.h"         HAVE_NET_IF_H)