Re: [RFC PATCH 32/42] docker: Add gentoo-mipsr5900el-cross image

[Philippe Mathieu-Daudé]

On 2/20/21 9:01 PM, Philippe Mathieu-Daudé wrote:
> On 2/15/21 2:45 PM, Fredrik Noring wrote:
>> On Mon, Feb 15, 2021 at 11:59:57AM +0000, Daniel P. Berrangé wrote:
>>> On Sun, Feb 14, 2021 at 06:59:02PM +0100, Philippe Mathieu-Daudé wrote:
>>>> Add a Docker image providing cross toolchain for the MIPS R5900 CPU
>>>> (used on the Sony PS2).
>>>>
>>>> This image is based on Gentoo and the toolchain is built using crossdev.
>>>
>>> Is there any way we can do this with a distro that isn't Gentoo
>>> so that we can get a container build that is fast enough to be
>>> useful for CI ?

Using the Debian cross image I get:

/home/phil/source/qemu/tests/docker/docker.py --engine auto cc --cc
mips64el-linux-gnuabi64-gcc -i qemu/debian-mips64el-cross -s
/home/phil/source/qemu --   -Wall -Werror -O0 -g -fno-strict-aliasing
-mabi=n32 -march=r5900
/home/phil/source/qemu/tests/tcg/mips/test-r5900-dmult.c -o
test-r5900-dmult  -static
cc1: error: unsupported combination: -march=r5900 -mhard-float
-mdouble-float

No clue what is setting '-mhard-float -mdouble-float' yet.

>>
>> Is it necessary to rebuild the toolchain every time?
> 
> No.
> 
>> Also, perhaps a
>> generic MIPS suite can be used; it shouldn't to necessary to have one
>> specifically made for the R5900 (except libc, if needed, I guess).
> 
> We want it to build TCG tests. If we can link them, that should be OK.
> 
>> As an alternative, TobiX at Github made an R5900 Docker image last year
>> <https://github.com/frno7/linux/issues/33#issuecomment-632284209>,
>> perhaps it could be useful somehow?
> 
> Thanks, I'll have a look.
> 
> Regards,
> 
> Phil.
>