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libcxx: use compiler's _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION when set

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closes #25911
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Alex Rønne Petersen 2025-11-13 19:52:30 +01:00
parent 18a131f3da
commit 375d873e1e
1 changed files with 16 additions and 13 deletions
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29
lib/libcxx/include/__config vendored
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@ -653,24 +653,27 @@ typedef __char32_t char32_t;
# define _DECLARE_C99_LDBL_MATH 1 # define _DECLARE_C99_LDBL_MATH 1
# endif # endif
/* zig patch: compiler defines _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION in some cases */
# if !defined(_LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION)
// If we are getting operator new from the MSVC CRT, then allocation overloads // If we are getting operator new from the MSVC CRT, then allocation overloads
// for align_val_t were added in 19.12, aka VS 2017 version 15.3. // for align_val_t were added in 19.12, aka VS 2017 version 15.3.
# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 # if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0 # define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0
# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) # elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
// We're deferring to Microsoft's STL to provide aligned new et al. We don't // We're deferring to Microsoft's STL to provide aligned new et al. We don't
// have it unless the language feature test macro is defined. // have it unless the language feature test macro is defined.
# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0 # define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0
# elif defined(__MVS__) # elif defined(__MVS__)
# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0 # define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0
# else # else
# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 1 # define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 1
# endif # endif
# if !_LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) # if !_LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)
# define _LIBCPP_HAS_ALIGNED_ALLOCATION 0 # define _LIBCPP_HAS_ALIGNED_ALLOCATION 0
# else # else
# define _LIBCPP_HAS_ALIGNED_ALLOCATION 1 # define _LIBCPP_HAS_ALIGNED_ALLOCATION 1
# endif
# endif # endif
// It is not yet possible to use aligned_alloc() on all Apple platforms since // It is not yet possible to use aligned_alloc() on all Apple platforms since