Re: Questions related to creation of libgcov.so

2018-08-06 Thread Alexander Monakov
On Fri, 3 Aug 2018, Martin Liška wrote:
> I'm attaching current patch, so any comment is welcomed.

Please consider passing -Wl,-z,now when linking the new shared library:
gcov has a few thread-local variables that may be accessed in async-signal
context, and Glibc has bugs related to lazy binding and/or allocation
(not sure which exactly) of TLS symbols.

Lazy binding doesn't buy anything for gcov, and that would be a cheap way
to avoid a regression.

On the other hand, it's not gcov's responsibility to work around
long-standing bugs in Glibc, so I don't insist.

Alexander

Re: dejagnu version update?

2018-08-06 Thread Jonathan Wakely
On Sat, 4 Aug 2018 at 17:32, Bernhard Reutner-Fischer wrote:
> debian-stable (i think 9 ATM), Ubuntu LTS ship versions recent enough
> to contain both fixes. Commercial distros seem to ship fixed versions,
> too.

The CentOS 7.4.1708 version on gcc112 doesn't seem to be fixed.


Re: dejagnu version update?

2018-08-06 Thread Mike Stump
On Aug 4, 2018, at 9:32 AM, Bernhard Reutner-Fischer  
wrote:
> On Tue, 16 May 2017 at 21:08, Mike Stump  wrote:
>> 
>> On May 16, 2017, at 5:16 AM, Jonathan Wakely  wrote:
>>> The change I care about in 1.5.3
>> 
>> So, we haven't talked much about the version people want most.  If we 
>> update, might as well get something that more people care about.  1.5.3 is 
>> in ubuntu LTS 16.04 and Fedora 24, so it's been around awhile.  SUSU is said 
>> to be using 1.6, in the post 1.4.4 systems.  People stated they want 1.5.2 
>> and 1.5.3, so, I'm inclined to say, let's shoot for 1.5.3 when we do update.
>> 
>> As for the machines in the FSF compile farm, nah, tail wagging the dog.  I'd 
>> rather just update the requirement, and the owners or users of those 
>> machines can install a new dejagnu, if they are using one that is too old 
>> and they want to support testing gcc.
> 
> So.. let me ping that, again, now that another year has passed :)

Putting on my random engineer hat, does Centos 7 have a patch in it?  My system 
says 1.5.1.

Since g++ already requires 1.5.3, it make no sense to bump to anything older 
that 1.5.3, so let's bump to 1.5.3.  Those packaging systems and OSes that 
wanted to update by now, have had their chance to update.  Those that punt 
until we bump the requirement, well, they will now have to bump.  :-)

Ok to update to 1.5.3.

I'll pre-approve the patches to simplify and remove work arounds from the 
testsuite that cater to older versions.

If an RM wants to push the approval to sometime later (post a release branch 
creation point for example), let's give them a few days to request deferral.  I 
don't want to impact any next release in a way an RM doesn't want.  RM approval 
for back ports, I think we don't want to back port to a previous release, but 
I'm happy to defer to RM; if they want to do it.

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