Improve the documentation around `ZERO_AR_DATE` In particular, document why we don't use the new `-reproducible` flag. I went through [the source for Apple's old linker](https://github.com/apple-oss-distributions/ld64), and compared the versions with [the mapping to Xcode versions on Wikipedia](https://en.wikipedia.org/wiki/Xcode) to find the relevant Xcode versions for these features. r? compiler |
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| asm | ||
| callconv | ||
| spec | ||
| json.rs | ||
| lib.rs | ||
| target_features.rs | ||
| tests.rs | ||