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fmeum
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With the exception of special module map names, all of them are effectively labels. This commit ensures that they are retained as `Label`s, not label string and thus: * memory usage is reduced for module maps from external repos, whose module map name previously resulted in a newly retained string; * module map names now use properly formatted external repo labels as names, which makes it more obvious what they are; * the roundtrip in header module compilation flows is avoided. This actually fixes a bug where the missing `@@` prefix for label strings resulted in incorrect or even failing `Label` calls due to main repo labels being resolved relative to the rules_cc repo and external repo labels failing the validation of the `Label` constructor.
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With the exception of special module map names, all of them are effectively labels. This commit ensures that they are retained as
Labels, not label string and thus:@@prefix for label strings resulted in incorrect or even failingLabelcalls due to main repo labels being resolved relative to the rules_cc repo and external repo labels failing the validation of theLabelconstructor.