[Interest] Qt 5.2 build (VS 2013 64-bit) generates crashing EXEs

[Andreas Hackelöer]

Found the error. If QT_QPA_PLATFORM_PLUGIN_PATH is set (even if it is set
to the correct path qtbase\plugins\platforms), Qt crashes while trying to
locate the platform plugin.


2013/12/12 Andreas Hackelöer <ahackeloeer at gmail.com>

> Hi,
>
> I followed these steps to create a 64-bit build of Qt 5.2 using Visual
> Studio 2013 (everything done from the Visual Studio 2013 ×64 Command
> Prompt):
>
> - I cloned the git repository: git clone git://gitorious.org/qt/qt5.git<qt-install-dir>
>
> - I ran the init-repository script: perl ./init-repository —no-webkit
>
> - I configured the build environment as follows:
>
> configure -debug-and-release -mp -opensource -platform win32-msvc2013
> -nomake examples -nomake tests -developer-build
>
> - I started the build process: *nmake*
>
> The following environment variables are set:
> PATH=..;<qt-install-dir>\qtbase\bin
> QTDIR=<qt-install-dir>\qtbase
> QT_QPA_PLATFORM_PLUGIN_PATH=<qt-install-dir>\qtbase\plugins\platforms
>
> The build compiles without errors, and I am able to build and run my own
> C++ application using this Qt build. However, some of the EXEs in the
> qtbase\bin folder do not work, e.g. assistant.exe, designer.exe or
> linguist.exe. For instance, if I try to run designer.exe, I get an
> immediate crash in memcpy() within a call to msvcr120.dll, which is the
> Microsoft Visual C++ 12 Runtime Library shipped with Visual Studio 2013.
>
> I know that changes have been introduced in memory alignment between VS
> 2010 and VS 2012 (and possibly also from VS2012 to VS2013) which can lead
> to this sort of crashes when builds of different VS platform toolsets are
> linked together. However, I built Qt using a single platform toolset
> (win32-msvc2013). Does anyone know how to solve this problem? I should add
> that everything works fine if I build Qt using VS2010 (which employs a
> different version of the MSVC Runtime), so this might be caused by some
> sort of incompatibility between Qt and the MSVC 12 Runtime.
>
> Best regards,
> Andi
>
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