Complete last ChangeLog entry.

[gnulib.git] / tests / test-trunc2.c

diff --git a/tests/test-trunc2.c b/tests/test-trunc2.c
index 397e1ad..c9f0d8f 100644 (file)
--- a/tests/test-trunc2.c
+++ b/tests/test-trunc2.c
@@ -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;
       }
   }