Re: Trying to crosscompile for POWER9

[Tobias Platen]

On 10/22/2018 06:39 PM, Leo Famulari wrote:
> On Sun, Oct 21, 2018 at 08:30:03AM +0200, Tobias Platen wrote:
> > On 10/20/2018 09:09 PM, Tobias Platen wrote:
> > Here are the build logs from guix. I have tried building the toolchain
> > twice, but in both cases glibc failed to build.
>
> [...]
>
> > running configure fragment for sysdeps/powerpc/powerpc64/le
> > checking if powerpc64le-linux-gcc supports binary128 floating point type... no
> > checking if the target machine is at least POWER8... yes
> > configure: error: ***  binary128 floating point type (GCC >= 6.2) is required 
> > on powerpc64le.
>
> Searching around, I found other distros hit the same problem for their
> POWER ports, and needed to explicitly configure GCC >= 6.2 to build with
> 128-bit floating point types. Specifically, with the option
> '--with-long-double-128':
>
> https://github.com/advancetoolchain/advance-toolchain/commit/e22696eecb39c6b401df14001f01608807e4d934
> http://lists.busybox.net/pipermail/buildroot/2017-August/200952.html
>
> I hope that helps!
I modified the file "gnu/packages/cross-base.scm" and the cross gcc 
still does not support 128-bit floating point types. How do I trigger a 
rebuild of the cross compiler so I can verify that it is configured 
correctly.

Tobias

build.log
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cross-base.diff
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