compiling gcc 4.1/4.2 snapshots on Mac/OSX

[Heitzso <heitzso at growthmodels dot com>]

I apologize for this cross post.  I posted to gcc-help and no one
responded.  I wanted a recent snapshot/release to pickup recent
classpath and am having trouble bootstrapping gcc on OSX/Tiger/10.4.
My email to gcc-help follows.   Thanks.
___

I've spent a couple days trying to get 2 different 4.1 snapshots and
a 4.2 snapshot to compile on OS X Tiger 10.4.  I've tried compiling
gcc with official Tiger 3.x and official Tiger 4.x gcc.  I've also tried
compiling with fink gcc 4.x.  All gcc bootstraps run for several hours
(1G RAM, 1.25ghz eMac) then stop at the same place.
It appears that it gets to a point in the build where it is testing
whether a bootstrap compiler functions.  But, on the console,
there is no target file provided to compile(?).  Next line states
that a.out does not work and the "make bootstrap" errors out.

==========

End of "make bootstrap", similar to all of the other failures to run
over the past few days:

checking target system type... powerpc-apple-darwin8.5.0
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for powerpc-apple-darwin8.5.0-gcc... 
/Users/heitzso/gcc-4.1/obj/./gcc/xgcc 
-B/Users/heitzso/gcc-4.1/obj/./gcc/ 
-B/Users/heitzso/gcc-4.1/gcc/powerpc-apple-darwin8.5.0/bin/ 
-B/Users/heitzso/gcc-4.1/gcc/powerpc-apple-darwin8.5.0/lib/ -isystem 
/Users/heitzso/gcc-4.1/gcc/powerpc-apple-darwin8.5.0/include -isystem 
/Users/heitzso/gcc-4.1/gcc/powerpc-apple-darwin8.5.0/sys-include  -m64
checking for C compiler default output file name... a.out
checking whether the C compiler works... configure: error: cannot run C 
compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.
make[2]: *** [configure-target-libstdc++-v3] Error 1
make[1]: *** [all] Error 2
make: *** [bootstrap] Error 2

==========

My configure command, run in gcc-4.1/obj:

../gcc-4.1.0-20060219/configure \
      --prefix=/Users/heitzso/gcc-4.1/gcc \
      --enable-languages=c,c++,java \
      --enable-threads=posix