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MSVC: Enable the detection of C++14 and 17 in MSVC 2017 15.7

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We need -Zc:__cplusplus in order to enable the __cplusplus macro having
the correct value. This causes configure to now print:

 Checking for C++14 support... yes
 Checking for C++1z support... yes

and

  Using C++ standard ..................... C++1z

Change-Id: I5d0ee9389a794d80983efffd152c95a4d9d8adbc
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Thiago Macieira 2018-05-07 22:55:09 -07:00
parent 427e5d61b7
commit 3e201d645e
1 changed files with 7 additions and 2 deletions
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9
mkspecs/common/msvc-version.conf
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@ -100,11 +100,16 @@ greaterThan(QMAKE_MSC_VER, 1909) {
# API is used in direct2d, but also in multimedia, positioning and sensors.
# We can try again with a later version of Visual Studio.
# QMAKE_CXXFLAGS_STRICTCXX = -permissive-
# MSVC partially supports the following, but '__cplusplus' definition is set
# as for C++98 until MSVC fully conforms with C++14, see
# https://developercommunity.visualstudio.com/content/problem/139261/msvc-incorrectly-defines-cplusplus.html
# QMAKE_CXXFLAGS_CXX14 = -std:c++14
# QMAKE_CXXFLAGS_CXX1Z = -std:c++latest
# Support became available in MSVC 2017 15.7:
greaterThan(QMAKE_MSC_VER, 1913) {
QMAKE_CXXFLAGS += -Zc:__cplusplus
QMAKE_CXXFLAGS_CXX14 = -std:c++14
QMAKE_CXXFLAGS_CXX1Z = -std:c++17
}
}
greaterThan(QMAKE_MSC_VER, 1910) {