Re: acloca20 test intermittent failure

[Stepan Kasal]

Hello,

On Fri, Oct 20, 2006 at 07:45:44AM +1000, Greg Schafer wrote:
> On Thu, Oct 19, 2006 at 08:51:11AM +0200, Ralf Wildenhues wrote:
> > Out of curiosity: how fast is this machine, how many and what kind of
> > CPUs does it have?
> 
> Reasonably fast. 1 x AMD Athlon64 X2 4200+ (dual core).

well, my quick attempt to reproduce this on my oldish machine did not
work.

> The patch helps a little because the failures seem to happen less often but
> unfortunately they do still occur :-(

I stared at the code for a while but I wasn't find other potential
cause of the problem.  I would like to understand the cause of the
problem, and thus I'd be grateful if you could perform some experiments
to help us to find it.

When the failure appears even though Ralf's patch was applied, does
the test fail at the same command (grep 'right foo') ?

If yes, then it seems that either aclocal or autoconf is failing.
To find out which one, could you please try to reproduce the failure
with the patch below?
Does the failure appear at
        grep 'ight foo' aclocal.m4
or at
        grep 'right foo'
?

Thanks,
        Stepan Kasal

Index: tests/acloca20.test
===================================================================
RCS file: /cvs/automake/automake/tests/acloca20.test,v
retrieving revision 1.1
diff -u -r1.1 acloca20.test
--- tests/acloca20.test 19 Mar 2006 05:09:11 -0000      1.1
+++ tests/acloca20.test 24 Oct 2006 10:27:48 -0000
@@ -52,6 +52,7 @@
 mv -f configure.int configure.in
 
 $ACLOCAL
-$AUTOCONF
+grep 'ight foo' aclocal.m4
+$AUTOCONF --force
 ./configure | grep 'right foo'
 grep 'wrong foo' foo.m4