unittest fix:

Added macro SKIP_NOTLS for skipping tests if MariaDB Connector/C
was build without TLS support.

mariadb_config/mariadb_config.c.in

@@ -36,7 +36,7 @@ static char *mariadb_progname;
 #define PLUGIN_DIR "%s/@INSTALL_PLUGINDIR@"
 #define SOCKET  "@MARIADB_UNIX_ADDR@"
 #define PORT "@MARIADB_PORT@"
-#ifdef HAVE_SSL
+#ifdef HAVE_TLS
 #define TLS_LIBRARY_VERSION "@TLS_LIBRARY_VERSION@"
 #else
 #define TLS_LIBRARY_VERSION ""

unittest/libmariadb/misc.c

@@ -1401,6 +1401,7 @@ static int test_sslenforce(MYSQL *unused __attribute__((unused)))
   const char *env= getenv("MYSQL_TMP_DIR");
   char cnf_file1[FN_REFLEN + 1];
 
+  SKIP_NOTLS;
   SKIP_SKYSQL;
 
   if (travis_test)

unittest/libmariadb/my_test.h

@@ -63,6 +63,16 @@ if (IS_SKYSQL(hostname)) \
   return SKIP; \
 }
 
+#ifndef HAVE_SSL
+#define SKIP_NOTLS \
+{ \
+  diag("TLS not supported"); \
+  return SKIP;\
+}
+#else
+#define SKIP_NOTLS
+#endif
+
 #define MAX_KEY MAX_INDEXES
 #define MAX_KEY_LENGTH_DECIMAL_WIDTH 4          /* strlen("4096") */