offload: automate manual clang-linker-wrapper step - #162309
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sgasho
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Sep 4, 2026
| pub(crate) struct OffloadEmbedFailed; | ||
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| #[derive(Diagnostic)] | ||
| #[diag("call to WrapImages failed, `wrapper.o` was not created")] |
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TODO(before merge): I forgot to fix the diag comment. wrapper.o no longer exists.
ZuseZ4
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Sep 4, 2026
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| if sess.opts.unstable_opts.offload.iter().any(|o| matches!(o, config::Offload::Host(_))) { | ||
| cmd.link_dylib_by_name("omptarget", false, true); |
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Thanks to your last PR, we should ship these in our sysroot. Is it guaranteed to be on our default search path? If not, we might want to add an rpath or -L, or?
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Yes, looking at walk_native_lib_search_dirs, it is on our default linker search path, so we don't need an additional -L, but we need an rpath for runtime. I also checked this on a UofT server.
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I'm looking into this issue I encountered while testing on a gpu server shotasugano@gpunode1:/w/333/shotasugano/sample-offload$ ./target/x86_64-unknown-linux-gnu/release/sample-offload
PluginInterface error: Failure to load binary image 0x62597fffacf0 on device 0: "jit compile failure while processing binary image" failure to jit IR image: Unable to find target for this triple (no targets are registered)
omptarget error: Failed to load image "a provided binary image is malformed" failed to load binary 0x62597fffacf0
omptarget fatal error 0: "the plugin backend is in an invalid or unsupported state" failed to load images on device '0'
Aborted ./target/x86_64-unknown-linux-gnu/release/sample-offloadupdate: |
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automate manual clang-linker-wrapper step from https://rustc-dev-guide.rust-lang.org/offload/usage.html
extract bitcode from device.bin and then wraps it into the host module.
needs some refactoring.
r? @ZuseZ4