Re: wxPython Phoenix build fail ("Could not build python extensions"?) in pyenv 3.5.1 on Linux

OK, so I made more progress with this.

Tried building with GTK3 but got some build errors with the html parts of 
wx that I did not get with GTK2.

I'm still trying to see if my error on wx import can be solved by turning 
off libnotify. I can see the configure options but for the life of me can't 
work out how to actually set the configure options. I've tried passing them 
to "waf" using the commands listed by "python build.py --help". I've tried 
setting " --with-libnotify=np" on various places on the recommended build 
command line. I tried running "./configure ..." first before the main build 
but that runs configure again.

So how do I set the configure flags ?

Michael Z Freeman

On Saturday, September 3, 2016 at 4:40:44 AM UTC+1, Robin Dunn wrote:
>
>
> I've just set up a new Ubuntu 16.04 VM and tried my recipe below using a 
> Python 3.5 venv (just to make sure it's clear, that is not the same thing 
> as the pyenv tool you are using) and it was successful.  The build 
> automatically will look in the base (system in this case) Python for 
> headers and libs and things that are not in the venv, because it is using 
> python itself to give the location of those things.
>
> There was one unexepected error on the first try, but it turned out that I 
> hadn't installed one of the python -dev packages.  I had installed 
> libpython3.5-dev but not python3.5-dev.  You'll also need python3.5-venv.
>
> On the other hand, a bit of googling turned up some similar issues with 
> pyenv that you are having.  Apparently it does not default to building 
> Python with the --enable-shared configure flag, and so it static links 
> everything into the python executable instead of creating the library that 
> waf is looking for.  The following link is about OSX, but other pages about 
> the problem on Linux pointed to this page too.
>
> https://github.com/yyuu/pyenv/wiki/Home/_compare/45570ea%5E...45570ea
>
> HTH,
> Robin
>
>
> Michael Freeman wrote:
>
> Thanks. Same error. BTW, if you don't know already, "pyenv" installs a 
> fully built installation of Python just as if I had downloaded the source 
> code it myself from the Python site and built then installed.
>
> There's things like *"err: /usr/bin/ld: cannot find -lpython3.5"* in 
> http://files.djbarney.org/config.log.txt
>
> Look at around line 102 ... 
>
> *"-L/home/michaelzfreeman/.pyenv/versions/3.5.1/lib', '-lpython3.5'] not 
> found".*If I'm correct, it's like the build script is looking for what 
> should be the system libraries ("libpython3.5-dev") in the virtual 
> environment and not finding them. I'll try setting some system variables to 
> point the build to the correct python libraries.
>
> So where are all the Linux experts in this forum ? I really need to get 
> this build working.
>
> MichaelZFreeman
>
> On Friday, September 2, 2016 at 12:44:24 AM UTC+1, Robin Dunn wrote:
>>
>> I don't know anything about pyenv, but is there any reason to not use 
>> Python 3.5's built-in virtual environment tool?  Make sure that Ubuntu's 
>> Python 3.5 package and the corresponding -dev package are installed, 
>> download a Phoenix source tar file, and then try something like this:
>>
>> mkdir ~/tmp-phoenix-build
>> cd ~/tmp-phoenix-build
>> pyvenv-3.5 my-py35
>> source my-py35/bin/activate
>> pip install -U pip setuptools six wheel 
>> pip wheel wxPython_Phoenix-3.0.3.dev2472+78ae39a.tar.gz
>>
>> You should end up with a .whl file in ~/tmp-phoenix-build which you can 
>> install in this or other compatible Python 3.5 environments (real or 
>> virtual) on your machine.
>>
>> Robin
>>
>>
>> Michael Freeman wrote:
>>
>> OK. I looked at this again. 
>>
>> First I don't know how to confirm that my Linux (Ubuntu Xenial) Python 
>> waf build system (in a "pyenv") is actually fully functional. This should 
>> be done first as I've only ever installed pure Python modules that need no 
>> compiling. It could be A. a problem with my Python install. B. Problem with 
>> system gcc compiler ... and any number of other system problems. So is 
>> there a waf test file, or at least a known good compile on Linux of some 
>> other Python module ?
>>
>> But meanwhile here's a little sleuthing. The "Checking for header 
>> Python.h: :-(" I thought might be a massive clue. Thought I'd missed the 
>> obvious ! But Python system "dev" package is installed. But ...
>>
>> "python-config --includes
>> -I/home/michaelzfreeman/.pyenv/versions/3.5.1/include/python3.5m 
>> -I/home/michaelzfreeman/.pyenv/versions/3.5.1/include/python3.5m"
>>
>> Correct path to "Python.h".
>>
>> Then it gives the "Getting pyext flags from python-config: Could not 
>> build python extensions" ... but ...
>>
>> "python-config --ldflags
>> -L/home/michaelzfreeman/.pyenv/versions/3.5.1/lib/python3.5/config-3.5m 
>> -L/home/michaelzfreeman/.pyenv/versions/3.5.1/lib -lpython3.5m -lpthread 
>> -ldl  -lutil -lm  -Xlinker -export-dynamic"
>>
>> "pyext" is installed and I can see it.
>>
>> But looking at "waf" config.log: http://files.djbarney.org/config.log
>>
>> ... (that I did not see before, don't why this it not reported to 
>> console) shows the real meat of the errors starting at line 418 ...
>>
>> "['/usr/bin/g++', '-shared', '-pthread', 'test.cpp.1.o', '-o', 
>> '/tmp/pip-build-k2pgcq1x/wxPython-Phoenix/build/waf/3.5/.conf_check_9814a9ffc41959a7044afc7703702a3d/testbuild/
>> testprog.cpython-35m-x86_64-linux-gnu.so', '-Wl,-Bstatic', 
>> '-Wl,-Bdynamic', '-L/home/michaelzfreeman/.pyenv/versions/3.5.1/lib', 
>> '-L/home/michaelzfreeman/.pyenv/versions/3.5.1/lib/python3.5/config-3.5m', 
>> '-lpython3.5m', '-lpthread', '-ldl', '-lutil', '-lm']
>> err: /usr/bin/ld: 
>> /home/michaelzfreeman/.pyenv/versions/3.5.1/lib/libpython3.5m.a(pylifecycle.o): 
>> relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making 
>> a shared object; recompile with -fPIC
>> /home/michaelzfreeman/.pyenv/versions/3.5.1/lib/libpython3.5m.a: error 
>> adding symbols: Bad value
>> collect2: error: ld returned 1 exit status"
>>
>> Could be some kind of 64 bit/32bit mismatch ? But I'm wildly guessing 
>> here.
>>
>> So I need to find a way of testing my build environment first before 
>> proceeding (see top).
>>
>> Michael Z Freeman
>>
>>
>

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