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Date:      Mon, 9 Feb 2026 11:47:31 -0500
From:      John Baldwin <jhb@FreeBSD.org>
To:        Jessica Clarke <jrtc27@freebsd.org>
Cc:        "src-committers@freebsd.org" <src-committers@FreeBSD.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@FreeBSD.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@FreeBSD.org>
Subject:   Re: git: ee73475119ff - main - llvm: Link private LLVM libraries against compiler_rt for aarch64
Message-ID:  <c9039150-1bb1-4466-9142-9e9ad560c73a@FreeBSD.org>
In-Reply-To: <E1734CF0-E6FC-40B8-BAD0-DE2269756E2E@freebsd.org>
References:  <698a0b1e.1d294.40e36519@gitrepo.freebsd.org> <E1734CF0-E6FC-40B8-BAD0-DE2269756E2E@freebsd.org>

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On 2/9/26 11:40, Jessica Clarke wrote:
> On 9 Feb 2026, at 16:28, John Baldwin <jhb@FreeBSD.org> wrote:
>>
>> The branch main has been updated by jhb:
>>
>> URL: https://cgit.FreeBSD.org/src/commit/?id=ee73475119ff7aa98bd11828625d524f6ab87f06
>>
>> commit ee73475119ff7aa98bd11828625d524f6ab87f06
>> Author:     John Baldwin <jhb@FreeBSD.org>
>> AuthorDate: 2026-02-09 16:26:52 +0000
>> Commit:     John Baldwin <jhb@FreeBSD.org>
>> CommitDate: 2026-02-09 16:26:52 +0000
>>
>>     llvm: Link private LLVM libraries against compiler_rt for aarch64
>>
>>     This is required for GCC which uses libcalls for outlined atomics.
> 
> This doesn’t seem right, they’re provided by libgcc.a, so why aren’t
> they being pulled in? libcompiler_rt.a doesn’t even have the symbols.

My guess is that we don't link libraries against libgcc by default, only
binaries (maybe this is a GCC feature/bug vs clang)?  I have another review
open for a couple of google test libraries which similarly fail to link.

-- 
John Baldwin



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