MyPaint needs to be updated to python 2.7

[ryandesign (Ryan Carsten Schmidt)]

​http://build.macports.org/builders/buildports-snowleopard-x86_64/builds/3282

[ryandesign (Ryan Carsten Schmidt)]

The error one gets with the attached simple update is:

scons: *** [lib/_mypaintlib.so] Implicit dependency `_PyMac_Error' not found, needed by target `lib/_mypaintlib.so'.

I don't understand what this means or why it happens with python 2.7 but not 2.6.

[ryandesign (Ryan Carsten Schmidt)]

simple patch (that results in the error)

[su-v]

Cc Me!

[ryandesign (Ryan Carsten Schmidt)]

• r87621: Worked around "You need to have numpy installed" error by adding py27-numpy dependency; yes I know this is ridiculous and welcome a proper fix to depend on only python 2.7 parts.

[ak.ml@…]

Cc Me!

[ak.ml@…]

The problem here is that python2.7-config adds a -u linker options (compared to python-2.6-config) that scons is unable to handle (this is documented).

$ python2.6-config --ldflags
-L/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/config -ldl -framework CoreFoundation -lpython2.6

$ python2.7-config --ldflags
-L/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config -ldl -framework CoreFoundation -lpython2.7 -u _PyMac_Error /opt/local/Library/Frameworks/Python.framework/Versions/2.7/Python

And in /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/scons-2.0.1/SCons/Environment.py

            # Other options not currently handled:
            #  -u symbol       (linker undefined symbol)

This is not fixed in scons 2.1.

As a workaround, I've put everything after -u in LINKFLAGS.
But simply removing everything after -u might work as well.

I'm attaching a sample patch that works for me.
With MyPaint 1.0.0 I had a UsingTheRightCompiler message, which is why I added a env['CXX'] line in the patch and in Portfile:

build.env-append    CXX=${configure.cxx}
destroot.env-append CXX=${configure.cxx}

[blender3dartist@…]

Cc Me!

[blender3dartist@…]

Heh, I was just looking into this, and then I find this here. Nice little surprise.

I tested out the patch and it works as described, MyPaint builds. You may consider sending the patch up to MyPaint as well?

[ryandesign (Ryan Carsten Schmidt)]

Thanks. I used the upstream patch from ​https://gna.org/bugs/?19119 instead. Committed in r88756.

[ryandesign (Ryan Carsten Schmidt)]

Replying to ak.ml@…:

With MyPaint 1.0.0 I had a UsingTheRightCompiler message,

Fixed in r88758 along with ensuring we use the right -arch flags and adding a universal variant.