[libcxx-commits] [libcxx] r352647 - [libc++] Don't define operator new/delete when using vcruntime
Thomas Anderson via libcxx-commits
libcxx-commits at lists.llvm.org
Wed Jan 30 11:08:33 PST 2019
Author: thomasanderson
Date: Wed Jan 30 11:08:32 2019
New Revision: 352647
URL: http://llvm.org/viewvc/llvm-project?rev=352647&view=rev
Log:
[libc++] Don't define operator new/delete when using vcruntime
Fixes build errors on Windows without libc++abi of the form:
new(173,36): error: redeclaration of 'operator delete' cannot add 'dllexport' attribute
_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p) _NOEXCEPT;
vcruntime_new.h(87,16): note: previous declaration is here
void __CRTDECL operator delete(
new(205,70): error: redefinition of 'operator new'
_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY void* operator new (std::size_t, void* __p) _NOEXCEPT {return __p;}
vcruntime_new.h(184,28): note: previous definition is here
inline void* __CRTDECL operator new(size_t _Size, _Writable_bytes_(_Size) void* _Where) noexcept
new(206,70): error: redefinition of 'operator new[]'
_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY void* operator new[](std::size_t, void* __p) _NOEXCEPT {return __p;}
vcruntime_new.h(199,28): note: previous definition is here
inline void* __CRTDECL operator new[](size_t _Size,
new(207,40): error: redefinition of 'operator delete'
inline _LIBCPP_INLINE_VISIBILITY void operator delete (void*, void*) _NOEXCEPT {}
vcruntime_new.h(190,27): note: previous definition is here
inline void __CRTDECL operator delete(void*, void*) noexcept
new(208,40): error: redefinition of 'operator delete[]'
inline _LIBCPP_INLINE_VISIBILITY void operator delete[](void*, void*) _NOEXCEPT {}
vcruntime_new.h(206,27): note: previous definition is here
inline void __CRTDECL operator delete[](void*, void*) noexcept
Differential Revision: https://reviews.llvm.org/D57362
Modified:
libcxx/trunk/include/__config
Modified: libcxx/trunk/include/__config
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/__config?rev=352647&r1=352646&r2=352647&view=diff
==============================================================================
--- libcxx/trunk/include/__config (original)
+++ libcxx/trunk/include/__config Wed Jan 30 11:08:32 2019
@@ -985,17 +985,18 @@ template <unsigned> struct __static_asse
#define _DECLARE_C99_LDBL_MATH 1
#endif
+#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
+# define _LIBCPP_DEFER_NEW_TO_VCRUNTIME
+#endif
+
// 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.
#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-#elif defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
-# define _LIBCPP_DEFER_NEW_TO_VCRUNTIME
-# if !defined(__cpp_aligned_new)
- // We're defering to Microsoft's STL to provide aligned new et al. We don't
- // have it unless the language feature test macro is defined.
-# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-# endif
+#elif defined(_LIBCPP_DEFER_NEW_TO_VCRUNTIME) && !defined(__cpp_aligned_new)
+ // We're defering to Microsoft's STL to provide aligned new et al. We don't
+ // have it unless the language feature test macro is defined.
+# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
#endif
#if defined(__APPLE__)
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