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