check for MSG_NOSIGNAL

configure.ac

@@ -331,6 +331,18 @@ AC_HELP_STRING([--disable-nonblocking],[Disable non-blocking socket detection]),
   CURL_CHECK_NONBLOCKING_SOCKET
 ])
 
+dnl **********************************************************************
+dnl Check for MSG_NOSIGNAL
+dnl **********************************************************************
+AC_MSG_CHECKING(for MSG_NOSIGNAL)
+AC_TRY_COMPILE([#include <sys/socket.h>],
+ [ int f = MSG_NOSIGNAL; ],
+ [ AC_MSG_RESULT(yes)
+   AC_DEFINE(HAVE_MSG_NOSIGNAL, 1,
+             [Define this symbol if you have MSG_NOSIGNAL]) ],
+ [ AC_MSG_RESULT(no)]
+)
+
 dnl **********************************************************************
 dnl Check for the random seed preferences 
 dnl **********************************************************************