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[2.45 PATCH 0/3] Backport GLIBC_ABI version dependencies

Sam James sam@gentoo.org
Thu Oct 2 12:34:04 GMT 2025 
Sam James <sam@gentoo.org> writes:

> "H.J. Lu" <hjl.tools@gmail.com> writes:
>
>> Richard would like to make GCC configure fatal by default unless users
>> have safe glibc or explicitly ask for it:
>>
>> https://inbox.sourceware.org/gcc-patches/CAFiYyc2P5ioY=w2wuHZoa275yLsEKBnnQbGgpkDDys=7x718kA@mail.gmail.com/
>>
>> This patch set backports GLIBC_ABI version dependencies to 2.45 so that we
>> can tell users to use it.
>
> Nick, for some more context:
>
> I'll note that we've backported the relevant symbols to appropriate
> glibc branches (quite far back) based on discussion there, but we need
> the GLIBC_ABI_GNU2_TLS dependency to be added by bfd for this to be useful.
>
> Coordinating changes across the GNU toolchain isn't easy. But it is a
> strength that we can do these things when necessary. My hope is we
> can have these backports (even if extraordinary) and possibly have a
> 2.45.1 release for:
> a) this, and
> b) the strip fixes (already on the branch), and
> c) the windres fix (already on the branch).
>
> I've been using these for a while and not had any issues.
>
> I will also note:
> * the GLIBC_ABI_DT_X86_64_PLT change here fixes some confusion that hit
>   distributors of glibc (https://sourceware.org/bugzilla/show_bug.cgi?id=33212#c0)
>   becausee we were previously abusing GLIBC_2.36 for that;
>
> * the GLIBC_ABI_GNU_TLS (not the GLIBC_ABI_GNU2_TLS one) change is
>   needed to know if binaries are safe even without any default changes
>   in GCC for i386 if TLS is used.

Gentle ping when you get a chance, Nick. Cheers!

>
>> [...]
>
> sam
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