build-context • 0.1.4Make build environment/target information available as constants in normal libraries and binaries.
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portable-atomic • 1.14.0Portable atomic types including support for 128-bit atomics, atomic float, etc.
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proc-macro2 • 1.0.107A substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case.