rust-embedded / rust-embedded/cortex-m

Doesn't support JSON targets

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Dominant language
Rust
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Description

If you supply a target as a JSON file, the build.rs can't detect the target. This is because target is a full path - in my case starts this starts C:\, which != thumbv.

I think the fix is to take the file_stem() of the path and use that. This should work for both JSON targets and built-in targets (that don't contain .). If the built-in target does use . (e.g. thumbv8-m.base) we'll need to be a bit cleverer.

This is the same as https://github.com/rust-embedded/cortex-m-rt/issues/145.

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Research direction

Start in build.rs at the target-detection logic and trace how the supplied target path is compared with the thumbv prefix. Check behavior for JSON target paths, built-in targets, and built-in names containing dots; done means all are detected correctly without breaking existing target handling.

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Assessment

Tech stack
rust
Domain
embedded-iot
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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