Re: [patches] eglibc builds and tests on mpc8540

[Steven Munroe <munroesj@xxxxxxxxxx>]

Clemens Koller wrote:

> Hello There!
>
> I want to build and test a current (2.5 or latest) (e)glibc which
> supports the powerpc e500 mpc8540 processor's SPE.
>
> I have a native linux system running on an mpc8540ads-like board
> which is also my development machine.
>
> I am still stuck with some older 2.6.12 kernel headers until
> I can get new headers when I am able to move over from ARCH=ppc to
> ARCH=powerpc. (some DeviceTree / Bootloader issues).
>
> I have an otherwise stable system (Linux From Scratch like) with
> binutils-2.17, gcc-3.4.6, gcc-4.1.1, gcc-4.1.2 and gcc-4.2.0
> built in a similar way:
>
> root@ecam:~$ gcc -v
> Using built-in specs.
> Target: powerpc-unknown-linux-gnu
> Configured with: ../gcc-4.2.0/configure --prefix=/usr 
> --libexecdir=/usr/lib --enable-languages=c,c++,objc 
> --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu 
> --enable-shared --disable-nls --with-x=no --with-float=soft 
> --with-cpu=8540 --with-tune=8540
> Thread model: posix
> gcc version 4.2.0 (ckcore)
>
> What linux kernel headers and glibc-headers do you recommend?

2.6.12 kernel headers  are ok.

> What build environment (hosts, binutils, gcc...) do you recommend?
You will need a gcc-4.1.1 with soft-fp long double patches from bugzilla 
2749, for a recent gcc-4.2 and a recent binutils (2.17).

libc-2.5 powerpc WILL NOT build without long double support.

> What patches are needed?
>
> Is it wise to stay with latest binutils/gcc development branches
> or go with the current stable ones (plus some patches)?
>
>
> I am aware of Linux From Scratch and
> friends. I also checked some of the eglibc archives.
>
> My idea is to write a script which builds the latest glibc (bootstraps
> the toolchain plus the core distro packages) and runs tests
> (linux-test-project) on a regular basis to check the toolchain
> for regressions and publish the results.
>
> The mpc8540 machine is running 24/7 and accessible by ssh.
> If it's of any help to improve eglibc and glibc, I am willing to
> offer an account on that machine.
>
> Thank you in advance,
>
> Clemens