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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: components_4_64 Test_Python fails on Mac Monterey
Date: Fri, 21 Oct 2022 20:41:25 +0100
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On 2022-10-21 19:04, Simon Wright wrote:
>> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
>> 
>>> This selects py-load_python_library.adb from os/pthread which is just
>>> a copy of os/linux. Likely there are differences between Linux and
>>> OSX.
>> dlopen() would need to see e.g.
>>    $FRAMEWORKS/Python.framework/Python/Versions/3.8/lib/libpython3.8.dylib
>> where $FRAMEWORKS would normally be /Library/Frameworks but, in
>> Roger's
>> case (running Homebrew), would be $HOMEBREW_PREFIX/Frameworks (Roger
>> might have frameworks scattered bewtween the two places, for added fun).
>
> Thanks Simon.
>
> Is the variable $FRAMEWORKS set or I have to search a whole set of
> subdirectories?

It's not set; I'm not sure what the Homebrew version would look like,
but it's probably like /Library/Frameworks. And I left out Current,
which chooses between e.g. 3.8, 3.9.

libpython := '';
find_libpython:
for top in $HOMEBREW_PREFIX/Frameworks, /Library/Frameworks loop
   if exists $top/Python then
      libpython := $top/Python/Versions/Current/lib/libpython*.dylib;
      exit find_libpython;
   end if;
end loop find_libpython;
fail if libpython is still ''

==========

There is another macOS package manager, MacPorts, but I've settled on
Homebrew.