Compilation fails on Snow Leopard, GCC 4.6.0, with --enable-fully-dynamic-string set during configure

[doug livesey]

Hi -- I installed GCC 4.6.0, and it seemed to be okay, but then I got
the kinds of error that this post suggested:
http://newartisans.com/2009/10/a-c-gotcha-on-snow-leopard/
So I've tried to recompile with the --enable-fully-dynamic-string set,
but that just gives me the following error:

<... lots of other output ...>
  checking command to parse
/Users/douglivesey/src/gcc-4.6.0/objdir.1/./gcc/nm output from
/Users/douglivesey/src/gcc-4.6.0/objdir.1/./gcc/xgcc
-B/Users/douglivesey/src/gcc-4.6.0/objdir.1/./gcc/
-B/usr/local/x86_64-apple-darwin10.7.0/bin/
-B/usr/local/x86_64-apple-darwin10.7.0/lib/ -isystem
/usr/local/x86_64-apple-darwin10.7.0/include -isystem
/usr/local/x86_64-apple-darwin10.7.0/sys-include    object... failed
  checking for x86_64-apple-darwin10.7.0-dsymutil... no
  checking for dsymutil... dsymutil
  configure: WARNING: using cross tools not prefixed with host triplet
  checking for x86_64-apple-darwin10.7.0-nmedit... no
  checking for nmedit... nmedit
  checking for x86_64-apple-darwin10.7.0-lipo... lipo
  checking for x86_64-apple-darwin10.7.0-otool... no
  checking for otool... otool
  checking for x86_64-apple-darwin10.7.0-otool64... no
  checking for otool64... no
  checking for -single_module linker flag... no
  checking for -exported_symbols_list linker flag... configure: error:
Link tests are not allowed after GCC_NO_EXECUTABLES.
  make[1]: *** [configure-target-libssp] Error 1
  make: *** [all] Error 2

Can anyone advise me on what steps I might take next to fix this?
Thankyou very much for any & all help.
   Doug.