X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-trunc2.c;h=c9f0d8fdd675a5d45df0f4ccad11755df705899a;hb=880d107;hp=d0da5519ccfa7fe9413c277122b06919c4f22966;hpb=987e5651e8d1c5aa933c9ce88562806af4093702;p=gnulib.git

diff --git a/tests/test-trunc2.c b/tests/test-trunc2.c
index d0da5519c..c9f0d8fdd 100644
--- a/tests/test-trunc2.c
+++ b/tests/test-trunc2.c
@@ -1,5 +1,5 @@
 /* Test of rounding towards zero.
-   Copyright (C) 2007-2009 Free Software Foundation, Inc.
+   Copyright (C) 2007-2010 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -16,6 +16,9 @@
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
+/* When this test fails on some platform, build it together with the gnulib
+   module 'fprintf-posix' for optimal debugging output.  */
+
 #include <config.h>
 
 #include <math.h>
@@ -123,8 +126,10 @@ check (double x)
       return 0;
     else
       {
+#if GNULIB_TEST_FPRINTF_POSIX
         fprintf (stderr, "trunc %g(%a) = %g(%a) or %g(%a)?\n",
                  x, x, reference, reference, result, result);
+#endif
         return 1;
       }
   }