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Bug #1047

closed

config/tests/cxx11.cc fails on MSVC

Added by Marco Eichelberg almost 3 years ago. Updated over 2 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Marco Eichelberg
Category:
Configuration
Target version:
3.6.8
Start date:
2022-11-17
Due date:
% Done:

0%

Estimated time:
Module:
CMake
Operating System:
Windows
Compiler:
MSVC

Description

According to the following forum post, the recognition of newer C++ versions fails on MSVC because MSVC does not update the _cplusplus macro,
which is checked in config/tests/cxx11.cc, unless the "/Zc:_cplusplus" option is specified:

https://forum.dcmtk.org/viewtopic.php?f=3&t=5219

The "/Zc:__cplusplus" option was introduced in Visual Studio 2017. We should, therefore, modify the CMake code to automatically set this option when MSVC 2017 or newer is detected.

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