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On Sun, May 07, 2017 at 02:08:03PM +0200, Luca Barbato wrote: |
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> On 5/7/17 11:19 AM, Jens Staal wrote: |
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> > On Sun, May 07, 2017 at 09:27:41AM +0200, Michał Górny wrote: |
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> >> On nie, 2017-05-07 at 08:05 +0200, Jens Staal wrote: |
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> >>> - it would be really cool if an "official" custom crt package for |
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> >>> llvm/clang could be in portage |
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> >>> |
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> >> |
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> >> This is something I really look forward to adding. Any suggestion on |
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> >> which crt implementation to use? |
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> >> |
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> >> I know that glibc provides crt1/i/n. Does musl provide them too, or does |
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> >> it need a more complete crt* set? |
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> >> |
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> >> -- |
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> >> Best regards, |
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> >> Michał Górny |
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> > |
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> > musl itself does not provide crt* as far as I know, but I downloaded the |
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> > relevant files from ELLCC, which is a musl/libc++ LLVM/clang toolchain |
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> > |
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> > http://ellcc.org/viewvc/svn/ellcc/trunk/libecc/src/musl/crt/ |
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> > |
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> > Those crt files originate from NetBSD and googling for crt |
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> > implementations often point to the NetBSD variants as drop-in |
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> > replacements of libgcc. |
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> > |
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> > |
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> |
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> IIRC during the GSoC the netbsd crt is the one that was used. I'd check |
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> how hard is to package it properly. |
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> |
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> lu |
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In principle not very hard at all, I just installed the .o files in |
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/usr/lib and it worked. |
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It might be interesting to put the crt* source files in a separate source |
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repository for making a new package. |
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For building and which files that are needed, see |
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/usr/local/hack/crt/build.sh in my stage4 |
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In my case, I only used the files needed for amd64, but ELLCC supports |
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several architectures so a more properly layed out source with |
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architecture-dependent build system would definitely be possible. |
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An important difference with the ELLCC crt-files: I had to move |
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__dso_handle from crt1 to crtbegin in order to replace libgcc (no idea |
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why!). |
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PS. |
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If a self-hosting clang would evolve into a true alternative system |
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compiler for Gentoo, it would definitely be interesting to evolve |
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"gcc-config" to a more generic "compiler-config" that also would point |
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to LLVM/Clang installations |
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DS. |
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