Re: Trying to crosscompile for POWER9

[Leo Famulari]

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!

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