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MSVC: Add empty definitions for std compile options

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There are no specific options for MSVC to set language standards, but
set them as empty strings anyways so the feature test infrastructure
can at least check to see if they are defined.
This commit is contained in:
Chuck Atkins 2017-05-10 16:37:19 -04:00
parent e556f1b909
commit 37221529c7
1 changed files with 16 additions and 2 deletions
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18
Modules/Compiler/MSVC-CXX.cmake
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@ -1,6 +1,20 @@
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 16.0)
# MSVC has no specific language level or flags to change it.
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0)
# MSVC has no specific options to set language standards, but set them as
# empty strings anyways so the feature test infrastructure can at least check
# to see if they are defined.
set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "")
set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "")
set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "")
set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "")
# There is no meaningful default for this
set(CMAKE_CXX_STANDARD_DEFAULT "")
endif()