On Thu, 10 Feb 2022, Björn Schäpers wrote:
I'm upgrading my build environment and switched my MinGW GCC from MSVCRT to
UCRT. I'm not very far in compiling Qt, but get the following warnings:
qdatetime.cpp:2372:35: warning: 'tzname' is deprecated: Only provided for
source
compatibility; this variable might not always be accurate when linking to
UCRT.
[-Wdeprecated-declarations]
return QString::fromLocal8Bit(tzname[isDst]);
It seems to me that we should use the #if defined(Q_CC_MSVC) path.
What would be the best way for that? I don't think you want a #if
defined(Q_CC_MSVC) || defined(_UCRT), or do you? Are there any plans to adapt
to
UCRT MinGW?
FWIW, the Qt CI does run one mingw toolchain with UCRT (and LLVM instead
of GCC), and AFAIK it does pass all the tests, so the setup in itself
shouldn't have any bigger issues. (See e.g.
https://codereview.qt-project.org/c/qt/qt5/+/394979 for one commit
updating that tool configuration.)
That said, there's probably still some things that could be done better,
like this use of 'tzname'.
// Martin
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