only enable client parsec plugin if HAVE_THREADS_H

Author: vuvova

cmake/mariadb_connector_c.cmake

@@ -7,7 +7,11 @@ ENDIF()
 SET(CONC_WITH_SIGNCODE ${SIGNCODE})
 SET(SIGN_OPTIONS ${SIGNTOOL_PARAMETERS})
 SET(CONC_WITH_EXTERNAL_ZLIB ON)
+
+CHECK_INCLUDE_FILES (threads.h HAVE_THREADS_H)
+IF(HAVE_THREADS_H)
 SET(CLIENT_PLUGIN_PARSEC DYNAMIC)
+ENDIF()
 
 IF(SSL_DEFINES MATCHES "WOLFSSL")
   IF(WIN32)