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x86_64-unknown-linux-musl cross-build fails on rustc 1.64 with PIE linking error #286

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opened 2022-07-01 00:35:45 +00:00 by foldedcascode · 5 comments
foldedcascode commented 2022-07-01 00:35:45 +00:00 (Migrated from gitlab.com)
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Description

When using a rust toolchain with version 1.64 (and likely any version >= 1.59), cross build for x86_64-unknown-linux-musl fails in the final step with a linker error indicating that libc was not compiled with fPIE and therefore can't be used to build a PIE.

Based on https://github.com/rust-lang/rust/pull/70740 I realized that conduit's custom cross image was linking against a system musl when it should be linking against the toolchain's musl, due to the way flags had been set to allow linking to libstdc++. This is a simple fix in the dockerfile used to build that cross image: https://gitlab.com/jfowl/conduit-containers/-/merge_requests/1

Once https://gitlab.com/jfowl/conduit-containers/-/merge_requests/1 is merged, updating Cross.toml to use the new cross images will fix the problem.

As a side-note: Interesting that cross uses a containerized toolchain to build, but uses the host toolchain to link. Or something like that; maybe I have it backwards, but, I'm surprised that the version of the host toolchain has an impact on the outcome of a build. I expected builds to be more consistently reproducible, I guess.

### Description When using a rust toolchain with version 1.64 (and likely any version >= 1.59), cross build for x86_64-unknown-linux-musl fails in the final step with a linker error indicating that libc was not compiled with fPIE and therefore can't be used to build a PIE. Based on https://github.com/rust-lang/rust/pull/70740 I realized that conduit's custom cross image was linking against a system musl when it should be linking against the toolchain's musl, due to the way flags had been set to allow linking to libstdc++. This is a simple fix in the dockerfile used to build that cross image: https://gitlab.com/jfowl/conduit-containers/-/merge_requests/1 Once https://gitlab.com/jfowl/conduit-containers/-/merge_requests/1 is merged, updating Cross.toml to use the new cross images will fix the problem. As a side-note: Interesting that cross uses a containerized toolchain to build, but uses the host toolchain to link. Or something like that; maybe I have it backwards, but, I'm surprised that the version of the host toolchain has an impact on the outcome of a build. I expected builds to be more consistently reproducible, I guess.
foldedcascode commented 2022-07-01 00:37:10 +00:00 (Migrated from gitlab.com)
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changed the description

changed the description
foldedcascode commented 2022-07-01 00:39:31 +00:00 (Migrated from gitlab.com)
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changed the description

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joshhansen commented 2022-08-23 05:03:42 +00:00 (Migrated from gitlab.com)
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mentioned in issue #302

mentioned in issue #302
foldedcascode commented 2022-10-09 20:02:59 +00:00 (Migrated from gitlab.com)
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mentioned in merge request !387

mentioned in merge request !387
CobaltCause commented 2024-01-25 00:21:59 +00:00 (Migrated from gitlab.com)
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This will be fixed in https://gitlab.com/famedly/conduit/-/merge_requests/569: we'll be producing statically linked binaries for this target in CI and you'll be able to use Nix to make your own binaries too.

This will be fixed in https://gitlab.com/famedly/conduit/-/merge_requests/569: we'll be producing statically linked binaries for this target in CI and you'll be able to use Nix to make your own binaries too.
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