Re: Multilib directory of n32 libs

On Thu, May 29, 2014 at 8:19 AM, David Kuehling <[email protected]> wrote:
>>>>>> "David" == David Daney <[email protected]> writes:
>
>> On 05/27/2014 06:58 PM, Yunqiang Su wrote:
>>> Sorry for dig it out again :-(
>>>
>>> If we put o32 multilib libraries in to /usr/lib directly, it will
>>> make lots of packages ftbfs, if they use -L/usr/lib.
>>>
>>> For this problem, we have another option that is:
>>>
>>> put ld.so.1 for o32 still in /lib while put other libraries to
>>> /usr/libo32 and /libo32.
>
>> As has been said many times before, there are already standard
>> locations established for libraries on MIPS systems.
>
>> 32-bit o32 ABI -> /lib, /usr/lib
>> 64-bit n32 ABI -> /lib32, /usr/lib32
>> 64-bit n64 ABI -> /lib64, /usr/lib64
>
> Are you sure that these "standard" locations apply to the mips64el
> debian port?  I think Yunqiang is talking about mips64el systems and not
> Debian mipsel in general.  Using /usr/lib only for the native mips64el
> libraries seems to be consistent with how things are handled on x86_64.
>
> What would you suggest WRT the build failures that Yunqiang mentioned?
> Do we now need to file bugs against all packages that assume that one or
> another library resides in /usr/lib?  That might slow down the porting
> efforts a lot.
>
>> The new Debian way of doing things puts things in directories something like:
>
>> /lib/mips-linux-gnu
>> /lib/mips64-linux-gnuabi64
>> /lib/mips64-linux-gnuabin32
>
> This would at least keep o32 libraries out of /usr/lib.  Yunqiang, any
> problems with switching to these directories?

We have 2 conceptions here:

Multilib:
we have libc6-mips32 and libc6-mipsn32, both of these 2 packages are marked as
mips64el packages.
They install c libraries into /lib and lib32.
Multilib is what we are talking about here.
The problem we talking about is whether we should install them to
/lib or /libo32.

Multiarch:
we have a package libc6 for both mipsel and mips64el.
libc6:mipsel install o32 libraries into /usr/lib/mipsel-linux-gnu, and
libc6:mips64el install n64 libraries into /usr/lib/mips64el-linux-gnuabi64.
With multiarch, we can install not only c libraries, but other
(nearly) all libraries of foreign arch(s).

Let's focus on talking about Multilib.

>
> David
> --
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-- 
Yunqiang Su