bug#22087: Problem with stdbuf configure test for 8.24 on Solaris with Studio C compiler.

[Paul Eggert]

How about the attached (untested) patch instead? It should fix the 
underlying problem, and thus avoid the need for fiddling with compiler 
flags.
diff --git a/configure.ac b/configure.ac
index 66c8cbe..3f546e9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -475,7 +475,8 @@ AC_LINK_IFELSE(
     {
       stdbuf = 1;
     }]],[[
-    return !(stdbuf == 1);]])
+    if (stdbuf != 1)
+      return 1;]])
   ],
   [stdbuf_supported=yes])
 AC_MSG_RESULT([$stdbuf_supported])