Regarding the regular expressions, I (or someone else unfamiliar with AIX) may be able to adjust them if you can explain what you are trying to achieve. Take the first one I commented on <https://bugs.python.org/review/26439/diff/17689/Lib/ctypes/_aixutil.py#newcode132> for example. You added a comment:

# '\[%s_*64\.so\]' % name, -> has either _64 or 64 added to name

As written, this will match many strings including

[<NAME>___64.so]

However the annotation leads me to belive you want it to match two cases only:

[<NAME>64.so]
[<NAME>_64.so]

I do not know whether to fix the annotation (has 64 preceded by any number of underscores), or whether to fix the regular expression (_?64).