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pythonpython-2.7wxpythonvirtualenvubuntu-14.10

How can I install wxPython 3.0.1.1 in Python 2.7 virtualenv on Ubuntu 14.10?

The following procedure fails. Am I missing something?

  • Install various Ubuntu packages (prerequisites for compilation)
  • Get http://downloads.sourceforge.net/wxpython/wxPython-src-3.0.1.1.tar.bz2
  • Uncompress to wxPython-src-3.0.1.1/
  • Create new virtualenv called test
  • Activate test virtualenv

  • In terminal, from wxPython-src-3.0.1.1/:

    ./configure --prefix=/home/username/.virtualenvs/test --with-gtk2 --enable-unicode --with-opengl
#lots of output, confirms "Configured wxWidgets 3.0.1 for `x86_64-unknown-linux-gnu'"

make install
#lots of output, confirms:
# The installation of wxWidgets is finished.  On certain
# platforms (e.g. Linux) you'll now have to run ldconfig
# if you installed a shared library and also modify the
# LD_LIBRARY_PATH (or equivalent) environment variable.

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:~/.virtualenvs/test/lib
# don't run ldconfig since that is a system tool, not appropriate for virtualenv?

cd wxPython
python setup.py install
# lots of output, starting:
# WARNING: WXWIN not set in environment. Assuming '..'
# Found wx-config: /home/username/.virtualenvs/test/bin/wx-config
#     Using flags:  --toolkit=gtk2 --unicode=yes --version=3.0
# Preparing CORE...
# Preparing STC...
# Preparing GLCANVAS...
# Preparing GIZMOS...
# running install
# etc

The final command fails with:

src/gtk/_core_wrap.cpp:20407:7: note: ‘arg3’ was declared here
   int arg3 ;
       ^
src/gtk/_core_wrap.cpp: In function ‘PyObject* _wrap_Image_SetAlphaBuffer(PyObject*, PyObject*, PyObject*)’:
src/gtk/_core_wrap.cpp:3747:13: warning: ‘arg3’ may be used uninitialized in this function [-Wmaybe-uninitialized]
             if (ALPHASIZE != self->GetWidth() * self->GetHeight()) {
             ^
src/gtk/_core_wrap.cpp:20474:7: note: ‘arg3’ was declared here
   int arg3 ;
       ^
cc1plus: some warnings being treated as errors
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
Solution

  • I used python setup.py install &> ~/error.txt to pass on the error messages to knowledgeable colleague who identified that C compilation was using the -Werror=format-security flag. This version of wxPython (and maybe others) cannot compile with that flag.

    My $CPPFLAGS and $CFLAGS environment variables were empty. It turns out that this flag is triggered by hardening-wrapper.

    So, I overrode the flag by invoking the final step as follows, and wxPython was installed successfully:

    CFLAGS=-Wno-error=format-security CPPFLAGS=-Wno-error=format-security python setup.py install