Re: fish rust build fails with "could not exec the linker `x86_64-pc-cygwin-gcc`"

On Wed, 15 Jul 2026 05:50:25 +0200, in gmane.os.cygwin.applications you =
wrote:

>Andrew Schulman via Cygwin-apps writes:
>> I'm making a first run at building fish version 4 (4.8.1), which is =
written in
>> rust. My cygport script and build output are below. The build fails =
with:
>>
>> error: could not exec the linker `x86_64-pc-cygwin-gcc`
>
>That's a red herring.
>
>> -- The C compiler identification is GNU 16.1.1
>
>First off, the Cygwin compiler is 14.4.0.  If you've did an "install all
>test packages" just to save figuring out which ones you actually need,
>you need to correct that.

Thanks. Not sure when that happened, but I just resynced all packages to
current.

>>    Compiling fish-gettext-mo-file-parser v0.0.0
>> =
(/home/Andrew/dev/cygwin/fish/fish-4.8.1-1.x86_64/src/fish-4.8.1/crates/g=
ettext-mo-file-parser)
>>       0 [main] rustc 5771 child_info_fork::abort:
>> \??\C:\cygwin64\bin\cygintl-8.dll: Loaded to different address:
>> parent(0x170000) !=3D child(0xA20000)
>
>There's your real problem: something needs rebasing and is currently
>occupying the same spot that an external part of the libc (which is used
>by the linker) would need to be placed into.  Both addresses are
>suspiciously low, though, so it's possible you may have a BLODA problem
>there.

OK. No BLODA here AFAIK, but it's hard to say for sure.

The address conflicts occur randomly, in different compilation steps each
time. Because of that, I can repeat the build as many times as I need to =
until
everything finally gets built. I just did that - I think it took about 6 =
times
- and finally fish is built and works. Hooray, sort of.

>> error: could not exec the linker `x86_64-pc-cygwin-gcc`
>
>=E2=80=A6due to the fork failing.
>
>My guess is that similarly to what I need to do for Perl XS
>distributions rustc needs to do an ephemeral rebase after building a new
>crate.

OK. Can you or anyone else shed any more light on that step? I looked at =
the
package sources for perl-Readonly-XS, perl-Text-CSV_XS, and
perl_XS-Parse-Keyword just to pick a few, and didn't see any rebase logic
there.

Thanks, Andrew