Errors with homebrew python3 after successful compilation

[shakfu]

I compiled flext successfully and used the following to build py without errors (python3.9 is installed via homebrew):

NP_INCL=`python3 -c "import numpy; print(numpy.get_include())"`
make CPPFLAGS="-I ../flext/source -DPY_NUMPY" \
     CFLAGS="-mmacosx-version-min=10.9 `python3-config --cflags` -I $NP_INCL" \
     LDFLAGS="-mmacosx-version-min=10.9 `python3-config --ldflags`"

After trying to run in PD, I get the following errors:

pyext simple ex3
... couldn't create
/Users/me/py/py.pd_darwin: dlopen(/Users/me/py/py.pd_darwin, 10): Symbol not found: _PyCapsule_Type
  Referenced from: /Users/me/py/py.pd_darwin
  Expected in: flat namespace
 in /Users/me/py/py.pd_darwin
 py script strcat
... couldn't create
/Users/me/py/py.pd_darwin: dlopen(/Users/me/py/py.pd_darwin, 10): Symbol not found: _PyCapsule_Type
  Referenced from: /Users/me/py/py.pd_darwin
  Expected in: flat namespace
 in /Users/me/py/py.pd_darwin
 py script addall
... couldn't create
/Users/me/py/py.pd_darwin: dlopen(/Users/me/py/py.pd_darwin, 10): Symbol not found: _PyCapsule_Type
  Referenced from: /Users/me/py/py.pd_darwin
  Expected in: flat namespace
 in /Users/me/py/py.pd_darwin
 py script
... couldn't create
/Users/me/py/py.pd_darwin: dlopen(/Users/me/py/py.pd_darwin, 10): Symbol not found: _PyCapsule_Type
  Referenced from: /Users/me/py/py.pd_darwin
  Expected in: flat namespace
 in /Users/me/py/py.pd_darwin
 py script strlen
... couldn't create
/Users/me/py/py.pd_darwin: dlopen(/Users/me/py/py.pd_darwin, 10): Symbol not found: _PyCapsule_Type
  Referenced from: /Users/me/py/py.pd_darwin
  Expected in: flat namespace
 in /Users/me/py/py.pd_darwin
 py script ret3
... couldn't create

Furthermore, running otool -L on the external shows that its not linked to any python lib:

$ otool -L py.pd_darwin
py.pd_darwin:
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1281.100.1)
	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1677.104.0)
	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 902.1.0)

Any ideas on what to do next?

[grybouilli]

If you use cmake, I made a fork & pull request with linking reinforcement which may solve your problem.

Otherwise, I'd advise you to look for the following line in the pd-lib-builder/Makefile.pdlibbuilder file:

cxx.ldlibs := -lc -lm -lstdc++

and add -lpython3.9. (Try several placement as linkers are sensitive to that).

But even then, things may not work (python will show up with otool -L tho); you might need to set the rpath of the py.pd_linux to point to where your libpython3.9.so file is located.

[shakfu]

@grybouilli Thanks for your response. I will revisit this and see how it goes.