[PATCH] linux: Add soft-fp folder for arm with --without-fp

[Adhemerval Zanella]

On 05/03/2020 12:16, Joseph Myers wrote:
> On Thu, 5 Mar 2020, Adhemerval Zanella wrote:
> 
>>> Based on disassembling a 2.27 binary (2.27 being the first release after 
>>> the sysdeps/ieee754/soft-fp directory was added), the sysdeps ordering was 
>>> working then, but I confirm it's broken now.  Thus this raises the 
>>> question of when the ordering broke, and thus (a) whether it might have 
>>> broken for any other configurations using sysdeps/ieee754/soft-fp at the 
>>> same time, and thus need fixing for them, (b) whether the breakage broke 
>>> ordering for anything other than nofpu directories and (c) whether it 
>>> might need a bug filed in Bugzilla if the issue was present in a release.  
>>> The addition of /le sysdeps directories is one change that might have had 
>>> a risk of breaking such ordering, but I don't know if it was that or not.
>>
>> It was the LE/BE sysdeps patch, I will send a new version.
> 
> Thanks.  Did the microblaze / sh changes break the sysdeps ordering in 
> those cases?  (In the microblaze case, there's no nofpu directory and 
> ieee754/soft-fp is in the same Implies file as ieee754/flt-32 and 
> ieee754/dbl-64, so maybe there isn't an issue there.)
> 

Only ARM is affected, on both sh and microblaze ieee754/soft-fp is selected
prior ieee754/flt-32 or ieee754/dbl-64. 

For sh4-linux-gnu-soft, 2.30 sysdeps order show:

sysdeps/unix/sysv/linux/sh/sh4
sysdeps/unix/sysv/linux/sh
sysdeps/sh/nptl
sysdeps/unix/sysv/linux
sysdeps/nptl
sysdeps/pthread
sysdeps/gnu
sysdeps/unix/inet
sysdeps/unix/sysv
sysdeps/unix/sh
sysdeps/unix
sysdeps/posix
sysdeps/sh/sh4
sysdeps/sh/nofpu
sysdeps/ieee754/soft-fp
sysdeps/sh
sysdeps/wordsize-32
sysdeps/ieee754/flt-32
sysdeps/ieee754/dbl-64
sysdeps/ieee754
sysdeps/generic

While on master:

sysdeps/unix/sysv/linux/sh/le/sh4
sysdeps/unix/sysv/linux/sh/sh4
sysdeps/unix/sysv/linux/sh/le
sysdeps/unix/sysv/linux/sh
sysdeps/sh/nptl
sysdeps/unix/sysv/linux sysdeps/nptl
sysdeps/pthread
sysdeps/gnu
sysdeps/unix/inet
sysdeps/unix/sysv
sysdeps/unix/sh
sysdeps/unix
sysdeps/posix
sysdeps/sh/le/sh4
sysdeps/sh/sh4
sysdeps/sh/le
sysdeps/sh/nofpu
sysdeps/ieee754/soft-fp
sysdeps/sh
sysdeps/wordsize-32
sysdeps/ieee754/flt-32
sysdeps/ieee754/dbl-64
sysdeps/ieee754
sysdeps/generic

And for microblaze-linux-gnu on 2.31:

sysdeps/unix/sysv/linux/microblaze
sysdeps/microblaze/nptl
sysdeps/unix/sysv/linux
sysdeps/nptl
sysdeps/pthread
sysdeps/gnu
sysdeps/unix/inet
sysdeps/unix/sysv
sysdeps/unix
sysdeps/posix
sysdeps/microblaze
sysdeps/wordsize-32
sysdeps/ieee754/soft-fp
sysdeps/ieee754/flt-32
sysdeps/ieee754/dbl-64
sysdeps/ieee754
sysdeps/generic

While on master:

sysdeps/unix/sysv/linux/microblaze/be
sysdeps/unix/sysv/linux/microblaze
sysdeps/microblaze/nptl
sysdeps/unix/sysv/linux sysdeps/nptl
sysdeps/pthread sysdeps/gnu
sysdeps/unix/inet
sysdeps/unix/sysv
sysdeps/unix
sysdeps/posix
sysdeps/microblaze/be
sysdeps/microblaze
sysdeps/wordsize-32
sysdeps/ieee754/soft-fp 
sysdeps/ieee754/flt-32
sysdeps/ieee754/dbl-64
sysdeps/ieee754
sysdeps/generic