[bug #34692] if multiple libobjc's exist, the use of AC_CHECK_FUNCS for checking functions in libobjc can give wrong results

[Richard Frith-Macdonald]

Follow-up Comment #3, bug #34692 (project gnustep):

I can't really make sense of this:

Firstly, I don't see how/why we should pick up the wrong libobjc ... we use
the results of `gnustep-config --objc-libs` which should be setting the
arguments to use the right one.

Secondly, I don't see where '-undefined dynamic_lookup' can be coming from ...
while target.make in gnustep-make does set that, it seems to do so only for
the flags for linking bundles, and that shouldn't be in the flags that
gnustep-base uses.

Perhaps this issue applies to older versions of the code and doesn't actually
occur for current gnustep?

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