[PyQt] Deploying PyQt5 application for Windows from Linux/MinGW

[Kyle Altendorf]

Hi All,

Is it possible to pyqtdeploy from a Linux host to a Windows target?  I 
successfully wrote a Linux->Linux script and after awhile moved on to 
Linux->Windows.  I got through both the host and target builds, did 
pyqtdeploy on Windows to nab the files out of an official python.org 
install, and then on to actually deploying.  While deploying I end up 
with:

i686-w64-mingw32.static-gcc -c -pipe -fno-keep-inline-dllexport -O2 -w 
-DPYQTDEPLOY_OPTIMIZED -DXML_STATIC -DCOMPILED_FROM_DSP -DMS_WINDOWS 
-D_WIN32_WINNT=Py_WINVER -DNTDDI_VERSION=Py_NTDDI -DWINVER=Py_WINVER 
-D_WIN32_WINNT=0x0400 -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB 
-DQT_CORE_LIB -DQT_NEEDS_QMAIN -I. 
-I../sysroot-win-32/src/Python-3.4.4/Modules/expat 
-I../sysroot-win-32/src/Python-3.4.4/Modules/_ctypes 
-I../sysroot-win-32/include/python3.4 
-I../sysroot-win-32/src/Python-3.4.4/Modules 
-I../sysroot-win-32/src/Python-3.4.4/Modules/_ctypes/libffi_msvc 
-I../sysroot-win-32/src/Python-3.4.4/PC 
-I/epc/t/134/st/../misc-build/sysroot/include 
-I../sysroot-win-32/native/src/mxe/usr/i686-w64-mingw32.static/qt5/include 
-I../sysroot-win-32/native/src/mxe/usr/i686-w64-mingw32.static/qt5/include/QtWidgets 
-I../sysroot-win-32/native/src/mxe/usr/i686-w64-mingw32.static/qt5/include/QtGui 
-I../sysroot-win-32/native/src/mxe/usr/i686-w64-mingw32.static/qt5/include/QtCore 
-Irelease 
-I../sysroot-win-32/native/src/mxe/usr/i686-w64-mingw32.static/qt5/mkspecs/win32-g++ 
  -o release/win32.o 
../sysroot-win-32/src/Python-3.4.4/Modules/_ctypes/libffi_msvc/win32.c
../sysroot-win-32/src/Python-3.4.4/Modules/_ctypes/libffi_msvc/win32.c: 
In function 'ffi_call_x86':
../sysroot-win-32/src/Python-3.4.4/Modules/_ctypes/libffi_msvc/win32.c:48:2: 
error: '_asm' undeclared (first use in this function)
   _asm {
   ^
../sysroot-win-32/src/Python-3.4.4/Modules/_ctypes/libffi_msvc/win32.c:48:2: 
note: each undeclared identifier is reported only once for each function 
it appears in
../sysroot-win-32/src/Python-3.4.4/Modules/_ctypes/libffi_msvc/win32.c:48:7: 
error: expected ';' before '{' token
   _asm {
        ^

A little searching later and it's clear that MinGW isn't going to be 
able to compile libffi_msvc/win32.c due to the two compilers having 
significantly different assembly formats.  My epyq.pro and 
Makefile.release are pasted (I hope that doesn't break etiquette here).

http://paste.ubuntu.com/14492530/
http://paste.ubuntu.com/14492531/

I will note that I ran across the following post to this list and was 
able to get past Jack's issue with SOLE_AUTHENTICATION_SERVICE by adding 
DEFINES += "_WIN32_WINNT=0x0400" to the qmake tab in my project.  I kind 
of assume that's a hacky solution, but it did get rid of the error.

https://www.riverbankcomputing.com/pipermail/pyqt/2015-August/036235.html

So, if cross-deploying from Linux->Windows should be possible, I am all 
ears and would be happy to put in more time.  My buildlibs script is 
perusable on GitHub if you are interested.  It is followed by deploy 
from the second repository.  I run both in there virtualenv's setup by 
venv.py from each repository (though that may be an unnecessary remnant, 
I don't recall at the moment).

https://github.com/altendky/misc/tree/7291865b0a8703458f9940cc8ab60d33fbb1795c
https://github.com/altendky/st/tree/34e730ef0ca1baeefba44293c4d045417c868717

Thanks for any feedback, and certainly also for all of PyQt.

Cheers,
-kyle