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FB13642542: Swift can't include iso646.h header on Darwin platform #470

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Kyle-Ye opened this issue Feb 22, 2024 · 0 comments

Kyle-Ye commented Feb 22, 2024

Date: 2024-02-22
Resolution: Open
Area: Swift Compiler
OS: macOS 14.2
Type: Incorrect/Unexpected Behavior
Keywords: Swift, compiler, preprocessor

Description

This is an early implementation workaround to avoid OS X frameworks broken. And it is causing some C library from being compiled in Swift side.

Hope Apple can take a look at this and fix it before Swift 6 so we can have less legacy burden and tech debt here.

Reproduce step:

https://forums.swift.org/t/including-c-system-headers-through-a-swift-package/66543/5

Related code:

https://github.com/apple/swift/blob/c251b3cf56ab107480a8fb1149a788aa101d29e2/lib/ClangImporter/ClangImporter.cpp#L556

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