I made enough progress on this issue to know there is a problem, but
that it's beyond what I can investigate further until I have more time.
What I'm doing instead is making the compiled and ready to install
SDCC 2.4 for Intel-Darwin available for anyone to download and
install. That way folks can keep using GNU Radio from the current SVN
repository, and at some time in the future maybe SDCC will get fixed,
or Apple's GCC will get fixed, or whatever the problem(s) is(are) will
get fixed. While XCode certainly seems suspicious, and most fingers
point to it being the issue, some fingers don't point there (they just
don't point, since those data points don't fit into any pattern I've
tested).
I've updated the "MacInstall" Wiki page with this info <
http://gnuradio.org/trac/wiki/MacInstall >. I'm also updating my
install guide with the same info. I would certainly appreciate
knowing that this work around does really work for (some, all, many)
Intel-Mac users. I know that it works for me. - MLD
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