Disable logging calls via conditional compilation when all defmt features are disabled#477
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bors[bot] merged 1 commit intoknurling-rs:mainfrom May 17, 2021
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Oh, yeah, and this has only gone through cursory testing and only on Windows. If there's a sensible place for me to introduce a test for this behavior, I'd be happy to do that; I don't see any tests for these macros as of now. |
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Thanks, this looks good! bors r+ |
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This is my take on fixing #411. It's not clear whether this is the "right" fix, as that issue was marked with a "medium" difficulty tag which would seem to imply there was more work expected here. Either way, it allows the sample in the linked issue to build for me, and fixes the usage in my own project.
The change here is to replace an "if" emitted by the logging macros (albeit with constant boolean conditions at macro evaluation time) with an explicit
#[cfg(...)]annotation. With the new form, the compiler seems to successfully strip out the unreachable macro body and as such there are no broken references to the nonexistent symbols.