| From | Sami Tolvanen <> | Date | Sun, 12 Jul 2020 16:34:39 -0700 | Subject | Re: [PATCH 00/22] add support for Clang LTO |
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On Sat, Jul 11, 2020 at 9:32 AM Paul Menzel <pmenzel@molgen.mpg.de> wrote: > Thank you very much for sending these changes. > > Do you have a branch, where your current work can be pulled from? Your > branch on GitHub [1] seems 15 months old.
The clang-lto branch is rebased regularly on top of Linus' tree. GitHub just looks at the commit date of the last commit in the tree, which isn't all that informative.
> Out of curiosity, I applied the changes, allowed the selection for i386 > (x86), and with Clang 1:11~++20200701093119+ffee8040534-1~exp1 from > Debian experimental, it failed with `Invalid absolute R_386_32 > relocation: KERNEL_PAGES`:
I haven't looked at getting this to work on i386, which is why we only select ARCH_SUPPORTS_LTO for x86_64. I would expect there to be a few issues to address.
> > arch/x86/tools/relocs vmlinux > arch/x86/boot/compressed/vmlinux.relocs;arch/x86/tools/relocs --abs-relocs vmlinux > > Invalid absolute R_386_32 relocation: KERNEL_PAGES
KERNEL_PAGES looks like a constant, so it's probably safe to ignore the absolute relocation in tools/relocs.c.
Sami
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