topic Re: Incorrect _MSVC_LANG when compiling with /std:c++latest in Intel® oneAPI DPC++/C++ Compiler

Incorrect _MSVC_LANG when compiling with /std:c++latest

ChoonHo — Fri, 16 Oct 2020 04:03:13 GMT

Windows 10

IDE

Visual Studio 19

Compiler

Intel(R) oneAPI DPC++ compiler

Toolkit

oneAPI Base Toolkit version 2021.1-beta09

Problem

msvc and clang report a value of 201704 whereas DPC++ reports 201703, which causes _HAS_CXX20 to be defined as 0, in turn, disabling C++20 features.

Currently, my workaround is to add -Xclang -std=c++20 which reports a value of 201705. However, SYCL headers are incompatible with C++20 std.

PrasanthD_intel — Fri, 16 Oct 2020 09:11:09 GMT

Hi,

This is a known issue that while using /std:c++latest with dpcpp in windows, you will face some errors.

We will inform this issue to our internal team.

Regards

Prasanth

ChoonHo — Fri, 16 Oct 2020 09:17:55 GMT

I see, must have missed it.

PrasanthD_intel — Wed, 21 Oct 2020 12:42:52 GMT

Hi,

Thanks for the confirmation. We will be closing the thread for now.

Please raise a new thread if you require any additional assistance.

Regards

Prasanth