[issue32095] AIX: ModuleNotFoundError: No module named '_ctypes' - make install fails

[Michael Felt]

Michael Felt  added the comment:

If I removed you from nosy - purely accidental - probably because you answered 
and I still had a dialog open with you not in it.

My apologies in any case. I'll be more careful should something like that 
happen again.

I am aware of the other dependencies - the only one I really care about for 
"master" is _ssl. Surprised that it would be missing. Will need some research 
on my side.

One of my "packaging" goals for python is to have it install by itself.
So I'll look at linking libffi statically so another fileset is not needed. 
(And remember to check for new libffi code when a new python version is 
released).

And - sorry for the duplicate!

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[issue32095] AIX: ModuleNotFoundError: No module named '_ctypes' - make install fails

[Zachary Ware]

Zachary Ware  added the comment:

You removed me from the nosy list, so I didn't see your reply until now when I 
happened to refresh the tab that happened to still be open :)

The warning I was talking about in that message was a warning that libffi was 
found but is outdated, which wouldn't be any help to you here.  There are 
already messages in the build log about libffi being missing and/or _ctypes not 
being built.

We do still bundle libffi for OSX and Windows, but we're trying to remove them. 
 I definitely don't want to add another bundled version.

You already have some install dependencies, or are missing some optional 
modules.  In particular, the lzma module depends on the xz package, readline 
depends on libreadline, _ssl depends on OpenSSL, _bz2 depends on bzip2, etc.  
There is a message at the end of `make` about which modules were not built and 
why.

Another workaround you could use (at the expense of not having pip installed) 
is to configure with `./configure --without-ensurepip`.

Finally, since we've nailed down that lack of libffi was in fact the source of 
the problem, this is a duplicate of #31652.

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nosy: +zach.ware
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> make install fails: no module _ctypes
versions:  -Python 3.8

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[issue32095] AIX: ModuleNotFoundError: No module named '_ctypes' - make install fails

[Michael Felt]

Michael Felt  added the comment:

no. I'll install what I have atm.

Too bad - as now it will have an install dependency.

re: https://bugs.python.org/issue27976#msg274628 -- seems a warning that libffi 
is not available might be useful after all.

Question: is ffi still bundled for Darwin - even in 3.7? If yes, maybe it 
should also be bundled for AIX.

In any case, just installing a libffi.a library fixed the install (i.e., make; 
make install)

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nosy:  -zach.ware
versions: +Python 3.8

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[issue32095] AIX: ModuleNotFoundError: No module named '_ctypes' - make install fails

[Zachary Ware]

Zachary Ware  added the comment:

Do you have libffi (and its development headers) installed where the compiler 
can find it?  Python 3.7 no longer bundles a copy of libffi (see #27979).

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versions:  -Python 3.8

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[issue32095] AIX: ModuleNotFoundError: No module named '_ctypes' - make install fails

[Michael Felt]

Michael Felt  added the comment:

FYI: version 3.6.3 compiles and builds without this issue.

+ make install DESTDIR=/var/aixtools/python/Python/3.6.3.0 > 
.buildaix/install.out
+ mkinstallp.ksh /var/aixtools/python/Python/3.6.3.0 > .buildaix/mkinstallp.out

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versions: +Python 3.7

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[issue32095] AIX: ModuleNotFoundError: No module named '_ctypes' - make install fails

[Michael Felt]

New submission from Michael Felt :

after git clone from master:
make install fails to complete with:

Important - python is not installed already.
FYI: also note - build completes successfully with 2.7.14 (will download and 
check other python3 versions)

if test "xupgrade" != "xno"  ; then  case upgrade in  upgrade) 
ensurepip="--upgrade" ;;  install|*) ensurepip="" ;;  esac;   ./python -E -m 
ensurepip  $ensurepip --root=/ ;  fi
Traceback (most recent call last):
  File "/data/prj/python/git/src/python3-3.7.0.1/Lib/runpy.py", line 193, in 
_run_module_as_main
"__main__", mod_spec)
  File "/data/prj/python/git/src/python3-3.7.0.1/Lib/runpy.py", line 85, in 
_run_code
exec(code, run_globals)
  File "/data/prj/python/git/src/python3-3.7.0.1/Lib/ensurepip/__main__.py", 
line 5, in 
sys.exit(ensurepip._main())
  File "/data/prj/python/git/src/python3-3.7.0.1/Lib/ensurepip/__init__.py", 
line 204, in _main
default_pip=args.default_pip,
  File "/data/prj/python/git/src/python3-3.7.0.1/Lib/ensurepip/__init__.py", 
line 117, in _bootstrap
return _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File "/data/prj/python/git/src/python3-3.7.0.1/Lib/ensurepip/__init__.py", 
line 27, in _run_pip
import pip
  File "/tmp/tmpg0jc_9p6/pip-9.0.1-py2.py3-none-any.whl/pip/__init__.py", line 
28, in 
  File "/tmp/tmpg0jc_9p6/pip-9.0.1-py2.py3-none-any.whl/pip/vcs/mercurial.py", 
line 9, in 
  File "/tmp/tmpg0jc_9p6/pip-9.0.1-py2.py3-none-any.whl/pip/download.py", line 
36, in 
  File "/tmp/tmpg0jc_9p6/pip-9.0.1-py2.py3-none-any.whl/pip/utils/glibc.py", 
line 4, in 
  File "/data/prj/python/git/src/python3-3.7.0.1/Lib/ctypes/__init__.py", line 
7, in 
from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'
make: 1254-004 The error code from the last command is 1.

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components: Build
messages: 306581
nosy: Michael.Felt
priority: normal
severity: normal
status: open
title: AIX: ModuleNotFoundError: No module named '_ctypes' - make install fails
versions: Python 3.8

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