Hi Tobias! Thank you for trying things out for POWER9! I'm also interested in this platform, although I have to admit I don't own any hardware (yet!) and haven't tried it out. I've only read about it so far.
Tobias Platen <trisq...@platen-software.de> writes: > 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. You can try to cross-build something as usual, I suppose. It's a bit heavy-handed, since it will try to build the entire cross-compilation toolchain also, but it might work. To see if you can build *just* the cross-compiler, you might need to get tricky. For example, you might need to break out a Guile REPL, load some Guix modules, and manually hack around with some of the code in gnu/packages/cross-base.scm. In theory, you ought to be able to create a package or a derivation that builds the cross-compiler you are using, or a cross-compiler that is similar to it. That's all the advice I can think of right now. You're not alone - I've fumbled around quite a bit while learning how Guix does its cross-compilation and bootstrapping. It's not easy going, but hopefully you will be able to find a way forward. Good luck! -- Chris
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