Hi all, I'm trying to build 3.7.1 from source and having trouble with
libffi and _ctypes. I'm on linux and have installed libffi also from
source to a custom location:

$HOME/opt/lib64/libffi.so.6.0.4
$HOME/opt/lib64/libffi.a
$HOME/opt/lib64/libffi.la
$HOME/opt/lib64/libffi.so.6
$HOME/opt/lib64/libffi.so
$HOME/opt/lib/pkgconfig/libffi.pc
$HOME/opt/lib/libffi-3.2.1/include/ffi.h
$HOME/opt/lib/libffi-3.2.1/include/ffitarget.h
$HOME/opt/share/info/libffi.info

I have no idea why the installation is somewhat scattered, these are
the default locations that were created by

./configure --prefix=$HOME/opt

of the source libffi.

In any case, just to be sure, I've copied the header files to

$HOME/opt/include/ffi.h
$HOME/opt/include/ffitarget.h

Looks like pkg-config works as intended:

[fetch@fetch opt]$ pkg-config --libs libffi
-L/home/fetch/opt/lib/../lib64 -lffi

[fetch@fetch opt]$ pkg-config --cflags libffi
-I/home/fetch/opt/lib/libffi-3.2.1/include

And as far as I know pkg-config is used by python's configure script
so everything should be fine. I also set
LD_LIBRARY_PATH=/home/fetch/opt/lib:/home/fetch/opt/lib64 and also
C_INCLUDE_PATH=/home/fetch/opt/include

And still I get

Failed to build these modules:
_ctypes

from make when I try to build python 3.7.1 Also tried adding
--with-system-ffi to ./configure but that didn't help either.

Does anyone have an idea what's wrong? I've seen some related bug reports, e.g.

https://bugs.python.org/issue35170

but these were typically solved by the OP installing libffi from the
repository of his/her distro. Note that in my case I must compile
libffi from source.

Any ideas?

Thanks a lot,
Daniel





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