[Buildroot] [Bug 14886] Python ctypes find_library() not working correctly.

[bugzilla@busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=14886

--- Comment #3 from Pete Morici <pmorici@dev295.com> ---
    I was able to solve this by enabling the LDSO_CACHE_SUPPORT option in
uclibc via a configuration fragment and then patching the file
Lib/ctypes/util.py in the python3 package to change the mapping of "x86_64-64"
from "libc6,x86_64" to "libc0".  I wasn't able to find a way to generate the
cache file during the build process so you have to run ldconfig on first boot,
you could use and init script, before using Python to generate /etc/ls.so.cache
and then ctypes will work correctly.

    The crux of the issue is that, on Linux, Python's ctypes module just isn't
compatible with anything except glibc because is explicitly looks for "libc6"
and other glibc specific items in the output of ldconfig -p which is uses to
resolve paths to libraries loaded with ctypes.  If you are using uclibc, of
musl you are going to run into this.

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