Pyside and QWS on embedded arm platform

silsil

Hi,

my platform:
hw= Beaglebone black
so= debian wheezy without X11 server installed
python3.2, qt4.8

I test simple helloword with c++ and it works very well with qws, but I prefer coding in python, hence:
Is possible run GUI applications ( without X11 server ) developted with Pyside ?

Thanks

SGaist

Hi and welcome to devnet,

Technically it should be (I haven't tried though), you'll have to build PySide using the embedded arm version of Qt.

silsil

Thanks for reply.
I see that there are several debian packages for my arm, hence I think that is enough "apt-get install python-pyside".

Im newibe in qt and pyside, and I cant understand how do I use QT video server in Pyside app.
In other words, in simple app ( like helloword ) develop in classic Qt/c++ I use <option> "-qws" to run it and works well.
In app developed in Pyside, how shall I run app with "-QWS" option ?

thanks

SGaist

Since you should be constructing a QApplication with the arguments given on the command line, I'll use the same call e.g.

@python myapp.py -qws@

silsil

Excuse me, but I cant understand

if Ive this script:

@#!/usr/bin/python

Import PySide classes

import sys
from PySide.QtCore import *
from PySide.QtGui import *

Create a Qt application

app = QApplication(sys.argv)

Create a Label and show it

label = QLabel("Hello World")
label.show()

Enter Qt application main loop

app.exec_()
sys.exit()# @

and i run it with this command line:

python myapp -qws

"-qws" argument...is not used in script, and it is ignored...or no?
Can you link me some docs about qws use in python script?

Thanks

SGaist

Like I said before, I haven't tried it yet, so it's essentially an educated guess.

When you call mycppapp -qws, -qws becomes an argument that will be pass to the QApplication object you create through argv. The same goes with sys.argv in python, it will contain -qws.

However, did you already built PySide to use the Embedded version of Qt ?

silsil

Hi,

I'm cross compiling Pyside on my host for my arm target, but i receive this error:

@
python2.7 setup.py bdist_wheel --qmake=/opt/qt-arm/bin/qmake --standalone

Make path: /usr/bin/make
Make generator: Unix Makefiles

Build directory: /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release
Install directory: /home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release

Python site-packages install directory: /home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release/lib/python2.7/site-packages
Creating build folder /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release...
Creating install folder /home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release...
Building module shiboken...
Creating module build folder /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release/shiboken...
Configuring module shiboken (/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken)...
Running process: /usr/bin/cmake -G "Unix Makefiles" -DQT_QMAKE_EXECUTABLE=/opt/qt-arm/bin/qmake -DBUILD_TESTS=False -DDISABLE_DOCSTRINGS=True -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release /home/silvio/BBB/download/PySide-1.2.2/sources/shiboken -DPYTHON_EXECUTABLE=/usr/bin/python2.7 -DPYTHON_INCLUDE_DIR=/usr/include/python2.7 -DPYTHON_LIBRARY=/usr/lib/libpython2.7.so -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=yes
/usr/bin/cmake -G Unix Makefiles -DQT_QMAKE_EXECUTABLE=/opt/qt-arm/bin/qmake -DBUILD_TESTS=False -DDISABLE_DOCSTRINGS=True -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release /home/silvio/BBB/download/PySide-1.2.2/sources/shiboken -DPYTHON_EXECUTABLE=/usr/bin/python2.7 -DPYTHON_INCLUDE_DIR=/usr/include/python2.7 -DPYTHON_LIBRARY=/usr/lib/libpython2.7.so -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=yes@

silsil

and after:

@ -- The C compiler identification is GNU 4.7.2
-- The CXX compiler identification is GNU 4.7.2
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Looking for Q_WS_X11
-- Looking for Q_WS_X11 - not found.
-- Looking for Q_WS_WIN
-- Looking for Q_WS_WIN - not found.
-- Looking for Q_WS_QWS
-- Looking for Q_WS_QWS - found
-- Looking for Q_WS_MAC
-- Looking for Q_WS_MAC - not found.
-- Found Qt4: /opt/qt-arm/bin/qmake (found suitable version "4.8.6", required is "4.5.0")
-- Found PythonLibs: /usr/lib/libpython2.7.so (found suitable version "2.7.3", required is "2.6")
-- Found LibXml2: /usr/lib/i386-linux-gnu/libxml2.so (found suitable version "2.8.0", required is "2.6.32")
-- Found LibXslt: /usr/lib/i386-linux-gnu/libxslt.so (found suitable version "1.1.26", required is "1.1.19")
-- sphinx-build - not found! doc target disabled
-- Configuring done
-- Generating done
-- Build files have been written to: /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release/shiboken
Compiling module shiboken...
Running process: /usr/bin/make
/usr/bin/make
[ 1%] Generating qrc_generator.cxx
Scanning dependencies of target apiextractor
[ 3%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/apiextractor.cpp.o

/opt/qt-arm/include/QtCore/qatomic_armv5.h: Assembler messages:
/opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction: swpb ........' /opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction:swpb ...............'
/opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction: swpb ...............' /opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction:swpb ...............'
/opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction: swpb .................' /opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction:swpb ...............'
/opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction: swpb ................' /opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction:swpb .....................'
/opt/qt-arm/include/QtCore/qatomic_armv5.h:131: Error: no such instruction: `swpb .................' @

Excuse me for multi posts, nut formatting code dosent work. I remove some character and replace with "......"

In your opinion, what is error ?
i dont know if problem is compiler....I use linaro toolchain

silsil

SGaist

The configuration is mixing your system gcc/libraries and the arm version

silsil

thanks for reply.

Now I make a TOOLCHAIN.CMAKE
I mount sdcard with rootfs in /media/rootfs with target rootfs
edit toolchain.cmake:

@# INCLUDE(CMakeForceCompiler)

CMake toolchain file for building ARM software on OI environment

this one is important

SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_SYSTEM_PROCESSOR arm)

#this one not so much
SET(CMAKE_SYSTEM_VERSION 1)

specify the cross compiler

SET(CMAKE_C_COMPILER /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/bin/arm-linux-gnueabihf-gcc)
SET(CMAKE_CXX_COMPILER /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/bin/arm-linux-gnueabihf-g++)
SET(CMAKE_CXX_FLAGS "-O3 -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=hard")
SET(CMAKE_STRIP /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/bin/arm-linux-gnueabihf-strip)

where is the target environment

SET(CMAKE_FIND_ROOT_PATH / /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/arm-linux-gnueabihf /media/rootfs /med$

search for programs in the build host directories

SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)

for libraries and headers in the target directories

SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
@

after I change setup.py in Pyside with this mod:

@# Build module

MY ADD "-DCMAKE_TOOLCHAIN_FILE=/home/silvio/BBB/toolchain.cmake",

    cmake_cmd = [
        OPTION_CMAKE,
 "-DCMAKE_TOOLCHAIN_FILE=/home/silvio/BBB/toolchain.cmake",
        "-G", self.make_generator,
        "-DQT_QMAKE_EXECUTABLE=%s" % self.qmake_path,
        "-DBUILD_TESTS=%s" % self.build_tests,
        "-DDISABLE_DOCSTRINGS=True",
        "-DCMAKE_BUILD_TYPE=%s" % self.build_type,
        "-DCMAKE_INSTALL_PREFIX=%s" % self.install_dir,
        module_src_dir
    ]@

always in setup.py i force

@ # change self.py_library
self.py_library = "/media/rootfs/usr/lib/libpython2.7.so"

    if sys.version_info[0] > 2:
        cmake_cmd.append("-DPYTHON3_EXECUTABLE=%s" % self.py_executable)
        cmake_cmd.append("-DPYTHON3_INCLUDE_DIR=%s" % self.py_include_dir)
        cmake_cmd.append("-DPYTHON3_LIBRARY=%s" % self.py_library)
        if self.build_type.lower() == 'debug':
            cmake_cmd.append("-DPYTHON3_DBG_EXECUTABLE=%s" % self.py_executable)
            cmake_cmd.append("-DPYTHON3_DEBUG_LIBRARY=%s" % self.py_library)
    else:

.....bla bla bla....
@
because during built i receive error that ld cannot find -lpython2.7
hence i force to use target's "libpython2.7 "

silsil

now my built

@root@deb32-dev-bbb:/home/silvio/BBB/download/PySide-1.2.2# python2.7 setup.py bdist_wheel --qmake=/opt/qt-arm/bin/qmake --standalone
Removing /home/silvio/BBB/download/PySide-1.2.2/pyside_package
running bdist_wheel
running build
Python architecture is 32bit
Inserting path "/opt/qt-arm/bin" to environment
Inserting path "/home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release/bin" to environment

Package version: 1.2.2
Build type: Release
Build tests: False

Make path: /usr/bin/make
Make generator: Unix Makefiles
Make jobs:

Script directory: /home/silvio/BBB/download/PySide-1.2.2
Sources directory: /home/silvio/BBB/download/PySide-1.2.2/sources
Build directory: /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release
Install directory: /home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release
Python site-packages install directory: /home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release/lib/python2.7/site-packages

Python executable: /usr/bin/python2.7
Python includes: /usr/include/python2.7
Python library: /usr/lib/libpython2.7.so
Python prefix: /usr
Python scripts: /usr/bin

Qt qmake: /opt/qt-arm/bin/qmake
Qt version: 4.8.6
Qt bins: /opt/qt-arm/bin
Qt plugins: /opt/qt-arm/plugins

OpenSSL libs: None

Building module shiboken...
Deleting module build folder /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release/shiboken...
Creating module build folder /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release/shiboken...
Configuring module shiboken (/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken)...
Running process: /usr/bin/cmake -DCMAKE_TOOLCHAIN_FILE=/home/silvio/BBB/toolchain.cmake -G "Unix Makefiles" -DQT_QMAKE_EXECUTABLE=/opt/qt-arm/bin/qmake -DBUILD_TESTS=False -DDISABLE_DOCSTRINGS=True -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release /home/silvio/BBB/download/PySide-1.2.2/sources/shiboken -DPYTHON_EXECUTABLE=/usr/bin/python2.7 -DPYTHON_INCLUDE_DIR=/usr/include/python2.7 -DPYTHON_LIBRARY=/media/rootfs/usr/lib/libpython2.7.so -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=yes
/usr/bin/cmake -DCMAKE_TOOLCHAIN_FILE=/home/silvio/BBB/toolchain.cmake -G Unix Makefiles -DQT_QMAKE_EXECUTABLE=/opt/qt-arm/bin/qmake -DBUILD_TESTS=False -DDISABLE_DOCSTRINGS=True -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/silvio/BBB/download/PySide-1.2.2/pyside_install/py2.7-qt4.8.6-32bit-release /home/silvio/BBB/download/PySide-1.2.2/sources/shiboken -DPYTHON_EXECUTABLE=/usr/bin/python2.7 -DPYTHON_INCLUDE_DIR=/usr/include/python2.7 -DPYTHON_LIBRARY=/media/rootfs/usr/lib/libpython2.7.so -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=yes
-- The C compiler identification is GNU 4.9.1
-- The CXX compiler identification is GNU 4.9.1
-- Check for working C compiler: /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/bin/arm-linux-gnueabihf-gcc
-- Check for working C compiler: /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/bin/arm-linux-gnueabihf-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/bin/arm-linux-gnueabihf-g++
-- Check for working CXX compiler: /home/silvio/BBB/gcc-linaro-arm-linux-gnueabihf-4.9-2014.05_linux/bin/arm-linux-gnueabihf-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Looking for Q_WS_X11
-- Looking for Q_WS_X11 - not found.
-- Looking for Q_WS_WIN
-- Looking for Q_WS_WIN - not found.
-- Looking for Q_WS_QWS
-- Looking for Q_WS_QWS - found
-- Looking for Q_WS_MAC
-- Looking for Q_WS_MAC - not found.
-- Found Qt4: /opt/qt-arm/bin/qmake (found suitable version "4.8.6", required is "4.5.0")
-- Found PythonLibs: /media/rootfs/usr/lib/libpython2.7.so (found suitable version "2.7.3", required is "2.6")
-- Found LibXml2: /media/rootfs/usr/lib/arm-linux-gnueabihf/libxml2.so (found suitable version "2.8.0", required is "2.6.32")
-- Found LibXslt: /media/rootfs/usr/lib/arm-linux-gnueabihf/libxslt.so (found suitable version "1.1.26", required is "1.1.19")
-- sphinx-build - not found! doc target disabled
-- Configuring done
-- Generating done
-- Build files have been written to: /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release/shiboken
Compiling module shiboken...
Running process: /usr/bin/make
/usr/bin/make @

silsil

@ [ 1%] Generating qrc_generator.cxx
Scanning dependencies of target apiextractor
[ 3%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/apiextractor.cpp.o

[my CUT]

[ 37%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/parser/declarator_compiler.cpp.o
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/declarator_compiler.cpp:109:2: warning: #warning "ptr to mem -- not implemented" [-Wcpp]
#warning "ptr to mem -- not implemented"
^
[ 38%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/parser/default_visitor.cpp.o
[ 40%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/parser/dumptree.cpp.o
[ 42%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/parser/lexer.cpp.o
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/lexer.cpp: In member function ‘void LocationManager::positionAt(std::size_t, int*, int*, QString*) const’:
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/lexer.cpp:87:9: warning: ‘ppline’ may be used uninitialized in this function [-Wmaybe-uninitialized]
int ppline, ppcolumn;
^
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/lexer.cpp:97:31: warning: ‘line2’ may be used uninitialized in this function [-Wmaybe-uninitialized]
*line = base_line + *line - line2 - 1;
^
#warning "implement me"
^
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/parser.cpp:2140:2: warning: #warning "implemente me (AST)" [-Wcpp]
#warning "implemente me (AST)"
^
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/parser.cpp:2297:2: warning: #warning "implement me" [-Wcpp]
#warning "implement me"
^
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/parser.cpp:2305:2: warning: #warning "implement me" [-Wcpp]
#warning "implement me"
^
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/parser.cpp:2900:2: warning: #warning "mark the ast as constant" [-Wcpp]
#warning "mark the ast as constant"
^
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/parser.cpp:2990:2: warning: #warning "Parser::skipFunctionBody() -- implement me" [-Wcpp]
#warning "Parser::skipFunctionBody() -- implement me"
^
/home/silvio/BBB/download/PySide-1.2.2/sources/shiboken/ApiExtractor/parser/parser.cpp:3019:2: warning: #warning "implement me" [-Wcpp]
#warning "implement me"
^
[ 50%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/parser/smallobject.cpp.o
[ 51%] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/parser/tokens.cpp.o

[my CUT]

[ 83%] Building CXX object libshiboken/CMakeFiles/libshiboken.dir/shibokenbuffer.cpp.o
Linking CXX shared library libshiboken-python2.7.so
[ 83%] Built target libshiboken
Scanning dependencies of target shiboken

[CUT]

[ 96%] Building CXX object generator/CMakeFiles/shiboken.dir/main.cpp.o
Linking CXX executable shiboken
[ 96%] Built target shiboken
[ 98%] Running generator for 'shiboken'...
/home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release/shiboken/generator/shiboken: 1: /home/silvio/BBB/download/PySide-1.2.2/pyside_build/py2.7-qt4.8.6-32bit-release/shiboken/generator/shiboken: Syntax error: word unexpected (expecting ")")
make[2]: *** [shibokenmodule/shiboken/shiboken_module_wrapper.cpp] Error 2
make[1]: *** [shibokenmodule/CMakeFiles/shibokenmodule.dir/all] Error 2
make: *** [all] Error 2
error: Error compiling shiboken
root@deb32-dev-bbb:/home/silvio/BBB/download/PySide-1.2.2#@

Can you help me ?
thanks

SGaist

For that one I can't, AFAIK, it's auto generated code

Important: Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct