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[5.5] Headers: exclude #include_next <stdatomic.h> on MSVC #3811

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Jan 20, 2022
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[5.5] Headers: exclude #include_next <stdatomic.h> on MSVC #3811

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6 changes: 5 additions & 1 deletion clang/lib/Headers/stdatomic.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,12 @@

/* If we're hosted, fall back to the system's stdatomic.h. FreeBSD, for
* example, already has a Clang-compatible stdatomic.h header.
*
* Exclude the MSVC path as well as the MSVC header as of the 14.31.30818
* explicitly disallows `stdatomic.h` in the C mode via an `#error`. Fallback
* to the clang resource header until that is fully supported.
*/
#if __STDC_HOSTED__ && __has_include_next(<stdatomic.h>)
#if __STDC_HOSTED__ && __has_include_next(<stdatomic.h>) && !defined(_MSC_VER)
# include_next <stdatomic.h>
#else

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