How does one set up a qt.conf to allow distribution of a Python + Qt5
based application built with mingw64 so that it may be installed in
whatever directory the user wants????
On the target system the binary files may not be modified, only a
configuration file like qt.conf may be created (or some environmental
variable set).
Background:
I finally made pymol work with Qt5 in a mingw64 terminal, in cmd.exe,
and from a .bat file. This is from the original location:
C:\progs\msys2\home\user\PymolU
Copy that entire directory to
C:\Temp\PymolU
And it still works when started from cmd.exe and the bat file (which is
in the top of the directory). However, that copy did not work on
another system where msys2 (etc.) was not also installed. On the build
machine Msys2 is installed in:
C:\progs\msys2
If that is renamed msys2 -> msys2_hide then the copy in Temp
no longer works. It fails when it tries to load the first qt plugin
with:
qt.qpa.plugin could not find the Qt platform plugin "windows" in ""
I think this must be because of the hard coding of addresses in parts of
Qt5. Supposedly one can work around this using qt.conf files. The
plugins in mingw64 are in:
/mingw64/share/Qt5/Qt
When all of that Qt folder is copied to
/c/Temp/PymolU/share/Qt5/Qt
and in the top level of PymolU a file qt.conf is created with:
[PATHS]
Prefix = C:/Temp/PymolU
Libraries = C:/Temp/PymolU/bin
it still fails with the same message.
(Note, Qt5OpenGL.dll and similar dll's are in C:/Temp/PymolU/bin along
with all
other dlls OTHER than those in the Qt plugin directory.)
Changing the path syntax to "/C/Temp/PymolU" or "C:\Temp\PymolU" did not
help. Putting a second copy in /C/Temp/PymolU/bin (where the python3
executable is) changed nothing.
Suggestions????
Thanks,
David Mathog
mat...@caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech
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