gcc43 doesn't build, "file is not of required architecture"

[probono@…]

I am trying to build gcc43 on a i386 PureDarwin 9 system. The build starts but then runs into an error which seemingly comes from the wrong architecture being used:

{{{... /bin/sh ../../../../gcc-4.3.4/libgcc/../mkinstalldirs x86_64 mkdir x86_64 ... ld: warning in /usr/lib/dylib1.10.5.o, file is not of required architecture ld: warning in /usr/lib/libc.dylib, file is not of required architecture Undefined symbols:

"_pthread_key_create", referenced from:

_gthread_key_create in unwind-dw2_s.o

... }}}

I am attaching a full log. What can I do to enforce i386 from start to end?

[probono@…]

gcc43 build log on PureDarwin 9 i386