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pyffi's Issues

Module won't load on some system.

The command python3-config may not return the valid linker flags if it is a symbolic
link to the python3.8-config. In this case it requires the --embed option which
adds the link options to the python system library.

This is what python3-config output on my machine. The -lpython3.8 is missing
causing a loading error in Gambit.

$ python3-config --ldflags
 -L/usr/lib  -lcrypt -lpthread -ldl  -lutil -lm -lm

$ python3-config --ldflags --embed
 -L/usr/lib -lpython3.8 -lcrypt -lpthread -ldl  -lutil -lm -lm

The error is:

*** ERROR IN ##load-module-or-file -- /home/frederic/.gambit_userlib/github.com/feeley/pyffi/@/pyffi@gambit409003@C/pyffi.o1: undefined symbol: _PyUnicode_Ready
(##get-module 'github.com/feeley/pyffi)

The issue is that the --embed is considered an invalid argument by python3-config when it is a symbolic link to older version of python.

$ python3-config --ldflags
-L/usr/lib64 -lpython3.6m -lpthread -ldl  -lutil -lm  -Xlinker -export-dynamic

$ python3-config --ldflags --embed
Usage: /usr/bin/python3.6m-config --prefix|--exec-prefix|--includes|--libs|--cflags|--ldflags|--extension-suffix|--help|--abiflags|--configdir

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