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[libc++] Fix disabling of extension warnings in C++20 and later (#134989)

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`__has_feature(modules)` is always true in C++20 and later. Instead of
using that, just disable extension warnings if they're not ignored
through the system header machinery anyways.
This commit is contained in:
Nikolas Klauser
2025-05-10 17:05:35 +02:00
committed by GitHub
parent 6a2a8ebe27
commit ab65e4a730
1 changed files with 3 additions and 3 deletions
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6
libcxx/include/__config
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@@ -538,9 +538,9 @@ typedef __char32_t char32_t;
# endif
// Clang modules take a significant compile time hit when pushing and popping diagnostics.
// Since all the headers are marked as system headers in the modulemap, we can simply disable this
// pushing and popping when building with clang modules.
# if !__has_feature(modules)
// Since all the headers are marked as system headers unless _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER is defined, we can
// simply disable this pushing and popping when _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER isn't defined.
# ifdef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
# define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS \
_LIBCPP_DIAGNOSTIC_PUSH \
_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++11-extensions") \