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Re: Phone call (was Re: Armhf dynamic linker path)


2012/4/12 Paulo César Pereira de Andrade
<paulo.cesar.pereira.de.andrade@gmail.com>:
> Em 11 de abril de 2012 20:22, Michael Hope <michael.hope@linaro.org> escreveu:
>> On 12 April 2012 10:38, Steve McIntyre <steve.mcintyre@linaro.org> wrote:
>>> On Wed, Apr 11, 2012 at 02:06:09AM +0100, Steve McIntyre wrote:
>>>>
>>>>And here's the details as promised.
>>>>
>>>>I've started a wiki page at
>>>>
>>>>https://wiki.linaro.org/OfficeofCTO/HardFloat/LinkerPathCallApr2012
>>>>
>>>>with a strawman agenda for now, and a Doodle poll at
>>>>
>>>>http://www.doodle.com/93bitkqeb7auyxn7
>>>>
>>>>to see when the best time is for the call on Thursday/Friday. Please
>>>>fill in the times that work for you ASAP and I'll announce the result
>>>>during Wednesday. Ideally we'd like stakeholders from all the relevant
>>>>distros and the upstream toolchain developers to be there, able to
>>>>represent their groups and (importantly) able to make a decision here
>>>>on what we should do.
>>>>
>>>>Apologies for the short notice, but we need a decision quickly.
>>>
>>> And the best time turns out to be Friday at 15:00 UTC (16:00 BST,
>>> 11:00 EDT etc.). Of the 10 people who responded in the poll, the only
>>> person who can't make that time is Michael in .nz. Sorry, Michael.
>>
>> All good. ?My vote is for /lib/ld-arm-linux-gnueabihf.so.3 as it:
>> ?* is similar to /lib/ld-x86-64.so.2
>> ?* keeps the libraries and loader in the same directory
>> ?* doesn't invent a new /libhf directory
>> ?* is easier to implement in GLIBC
>> ?* is architecture and ABI unique
>> ?* requires less change for distros where the hard float libraries are
>> already in /lib
>
> ?Sorry for more bikeshedding, but afaik rpm based distros are
> using the armv7hl identifier, so it could as well be
>
> /lib/ld-linux-armv7hl.so.3

This includes the ABI (h), adds the endianess (l), and implies a
architecture level (v7).  The name for the most common configurations
should be as short as possible so I'd rather drop the 'l' and add a
'b' or 'eb' if anyone wants a big endian distro in the future.  The
architecture level is a problem as the loader should also be valid on
ARMv5 and ARMv6 hard float builds.  Skype should be able to make a
hard float binary that runs on everything, including a potential ARMv6
hard float RaspberryPi build.

> ?Other variant could be
>
> /armv7hl-linux/lib/ld.so.3

This introduces both a new directory and a new style for naming :)

-- Michael


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