[Libc++] Use #pragma push_macro/pop_macro to better handle min/max on Windows Summary: This patch improves how libc++ handles min/max macros within the headers. Previously libc++ would undef them and emit a warning. This patch changes libc++ to use `#pragma push_macro` to save the macro before undefining it, and `#pragma pop_macro` to restore the macros and the end of the header. Reviewers: mclow.lists, bcraig, compnerd, EricWF Reviewed By: EricWF Subscribers: cfe-commits, krytarowski Differential Revision: https://reviews.llvm.org/D33080 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@304357 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/thread b/include/thread index 360b43d..1b8dca3 100644 --- a/include/thread +++ b/include/thread
@@ -105,6 +105,9 @@ #pragma GCC system_header #endif +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + #define __STDCPP_THREADS__ __cplusplus #ifdef _LIBCPP_HAS_NO_THREADS @@ -476,4 +479,6 @@ #endif // !_LIBCPP_HAS_NO_THREADS +_LIBCPP_POP_MACROS + #endif // _LIBCPP_THREAD
