Re: ping #3: [RFA] Add --with-libz-prefix option in config/zlib.m4

H.J. Lu
2015-02-18T22:24:24Z

On Wed, Feb 18, 2015 at 2:21 PM, Mike Frysinger <vapier@gentoo.org> wrote:
> On 18 Feb 2015 13:54, H.J. Lu wrote:
>> On Wed, Feb 18, 2015 at 1:40 PM, Mark Wielaard wrote:
>> > On Wed, 2015-02-18 at 12:53 -0800, H.J. Lu wrote:
>> >> On Wed, Feb 18, 2015 at 12:32 PM, Mark Wielaard wrote:
>> >> > That doesn't seem like a smart default. And why is is Linux/x86 only?
>> >> > Shouldn't that be something that is done explicitly by a distro
>> >> > configuring binutils after making sure it actually is beneficial
>> >> > (debuginfo is often compressed in a different way, on the package/file
>> >> > level or with dwz). And after making sure all tools actually work with
>> >> > it? There are various tools that don't handle the .zdebug format like
>> >> > valgrind. And at least elfutils has trouble with it for ET_REL files,
>> >> > like kernel modules, because relocations don't actually apply anymore to
>> >> > the section data as is (but only after the decompression).
>> >>
>> >> Now it becomes a monthly topic:
>> >>
>> >> https://sourceware.org/ml/binutils/2015-01/msg00089.html
>> >
>> > Thanks, I hadn't seen that before. Alan Modra makes some good points in
>> > that thread why it is not a good change:
>> > https://sourceware.org/ml/binutils/2015-01/msg00135.html
>> > Do people agree with that? And/Or can the change be reverted for now
>> > till there is agreement it is a desirable default?
>>
>> It may not be a good idea for all targets. If you find an issue
>> on Linux/x86, please file a bug binutils report.
>
> i think we already have the reports: multiple people don't think it should be
> (1) x86-specific or (2) required. don't get me wrong -- i think having support
> like this is great. that doesn't mean we should be forcing it.
> -mike

Please file a bug report with a testcase.

--
H.J.