[Bug testsuite/53222] New: dejagnu trims leading whitespace

[Bug testsuite/53222] New: dejagnu trims leading whitespace

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53222

             Bug #: 53222
           Summary: dejagnu trims leading whitespace
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: manu@gcc.gnu.org


This patch should still allow us to prune all caret diagnostics, since they
always start with whitespace:

Index: libstdc++-v3/testsuite/lib/prune.exp
===================================================================
--- libstdc++-v3/testsuite/lib/prune.exp        (revision 187039)
+++ libstdc++-v3/testsuite/lib/prune.exp        (working copy)
@@ -34,11 +34,11 @@ proc libstdc++-dg-prune { system text } 

 #    send_user "Before:$text\n"

     # Ignore caret diagnostics. Unfortunately dejaGNU trims leading
     # spaces, so one cannot rely on them being present.
-    regsub -all "(^|\n)\[^\n\]+\n *\\^\n" $text "\n" text
+    regsub -all "(^ |\n )\[^\n\]+\n *\\^\n" $text "\n" text

     # Cygwin warns about -ffunction-sections
     regsub -all "(^|\n)\[^\n\]*: -ffunction-sections may affect debugging on
some targets\[^\n\]*" $text "" text

     # Remove parts of warnings that refer to location of previous

However, DejaGNU seems to trim leading whitespace:

/home/manuel/test2/src/libstdc++-v3/testsuite/17_intro/using_namespace_std_tr1_neg.cc:66:27:
error: expected namespace-name before ';' token^M
   using namespace std::tr1;  // { dg-error "is not a namespace-name" }^M
                           ^^M

PASS: 17_intro/using_namespace_std_tr1_neg.cc  (test for errors, line 66)
PASS: 17_intro/using_namespace_std_tr1_neg.cc  (test for errors, line 66)
FAIL: 17_intro/using_namespace_std_tr1_neg.cc (test for excess errors)
Excess errors:
using namespace std::tr1;  // { dg-error "is not a namespace-name" }
                        ^

This is unfortunate, because it makes quite hard to match any arbitrary output.

[Bug testsuite/53222] dejagnu trims leading whitespace

[skannan at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53222

--- Comment #1 from Shakthi Kannan <skannan at redhat dot com> 2013-04-19 07:29:43 UTC ---
Created attachment 29902
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29902
namespace error after applying patch

Can you please provide the version of GCC that you used?

I built GCC-4.8.0 (x86_64) after applying the patch and I get the attached
errors.

[Bug testsuite/53222] dejagnu trims leading whitespace

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53222

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |trivial

--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2013-04-19 07:51:14 UTC ---
Did you run with -fdiagnostics-show-caret enabled? 

At the end, it was decided to disable it for the testsuite, so this report is
not very important anymore. It would be nice if DejaGNU didn't alter the
output, but right now, it doesn't affect us.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW000

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-04-19 08:03:34 UTC ---
Shorter testcase:
/* PR tree-optimization/57000 */
/* { dg-do compile } */
/* { dg-options "-Ofast -frounding-math" } */

double baz (double foo, double bar)
{
  return foo * foo * foo * foo * bar * bar * bar * bar;
}