Updated documentation on cross building LLVM for Musl

Updated documentation on cross building LLVM for Musl

[Croepha]

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I spent some time figuring out how to get Clang and related tools to build
against musl starting from a Glib system.  The result is a GNU-less (no
libgcc, libstdc++, and GNU LD, AR...) toolchain. I figured I'd share in the
hopes that someone else may find it useful...

Note:  Clang and friends works as expected, but I couldn't get the
sanitizers to build against Musl, so that is the only limitation that I am
aware of...

Full doc here:
https://gist.github.com/croepha/cdaf30638109b1a949f35aa215a7c86d

--Dave

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Re: Updated documentation on cross building LLVM for Musl

[A. Wilcox]

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On 02/13/19 12:59, Croepha wrote:
> 
> I spent some time figuring out how to get Clang and related tools to
> build against musl starting from a Glib system.  The result is a
> GNU-less (no libgcc, libstdc++, and GNU LD, AR...) toolchain. I figured
> I'd share in the hopes that someone else may find it useful...
> 
> Note:  Clang and friends works as expected, but I couldn't get the
> sanitizers to build against Musl, so that is the only limitation that I
> am aware of...
> 
> Full doc here:
> https://gist.github.com/croepha/cdaf30638109b1a949f35aa215a7c86d
> 
> --Dave
> 
> 

Beginning of document:

# LLVM seems to work great on Musl, there only seems some build errors
# when trying to build the sanitizers.  So sanitizers have been enabled.

You probably mean "disabled".

Thanks for this.  Does LLVM have things like ar(1), as(1), nm(1) and
friends as well?  So you really don't need binutils?

Best,
--arw

-- 
A. Wilcox (awilfox)
Project Lead, Adélie Linux
https://www.adelielinux.org


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Re: Updated documentation on cross building LLVM for Musl

[Dave Butler]

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On Wed, Feb 13, 2019 at 1:13 PM A. Wilcox <awilfox@adelielinux.org> wrote:

> On 02/13/19 12:59, Croepha wrote:
> >
> > I spent some time figuring out how to get Clang and related tools to
> > build against musl starting from a Glib system.  The result is a
> > GNU-less (no libgcc, libstdc++, and GNU LD, AR...) toolchain. I figured
> > I'd share in the hopes that someone else may find it useful...
> >
> > Note:  Clang and friends works as expected, but I couldn't get the
> > sanitizers to build against Musl, so that is the only limitation that I
> > am aware of...
> >
> > Full doc here:
> > https://gist.github.com/croepha/cdaf30638109b1a949f35aa215a7c86d
> >
> > --Dave
> >
> >
>
> Beginning of document:
>
> # LLVM seems to work great on Musl, there only seems some build errors
> # when trying to build the sanitizers.  So sanitizers have been enabled.
>
> You probably mean "disabled".
>
> Yes!, thanks for pointing that out, fixed now


> Thanks for this.  Does LLVM have things like ar(1), as(1), nm(1) and
> friends as well?  So you really don't need binutils?
>
> Yes, LLVM's versions of those files are llvm-ar, llvm-as, and llvm-nm, but
you can just make simlinks to as, as and nm

I was able to build a few things with that toolchain without GNU binutils,
haven't found any deal-breaking limitations so far...



> Best,
> --arw
>
> --
> A. Wilcox (awilfox)
> Project Lead, Adélie Linux
> https://www.adelielinux.org
>
>

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