toolchain/38053: can't cross-build using xcode 3.0 on os x 10.5/ppc

[msporleder%gmail.com@localhost]

>Number:         38053
>Category:       toolchain
>Synopsis:       can't cross-build using xcode 3.0 on os x 10.5/ppc
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 18 14:50:00 +0000 2008
>Originator:     matthew sporleder
>Release:        current
>Organization:
mspo.com
>Environment:
leopard/ppc
>Description:
The tools version of gcc refuses to build on osx/ppc due to:
/usr/include/ppc/_structs.h
/usr/include/mach/ppc/_structs.h

Which causes problems for
src/tools/gcc/../../gnu/dist/gcc4/gcc/config/rs6000/host-darwin.c

It seems that you can build the toolchain if you:
#def __DARWIN_UNIX03 0 in that file, but you end up with a non-working compiler.

I have also built tools with HOST_CFLAGS="-D__DARWIN_UNIX03=0" and gotten the 
tools to build, but I haven't managed to get a successful -current build with 
those tools yet.  (I've only tried twice, so it may have been not building at 
the time)

The real problems seems to be that gcc detects __DARWIN_UNIX03, which uses some 
different definitions from _strcuts.h for rs6000 (whatever that is -- weird ibm 
arch?).
>How-To-Repeat:
build.sh -m i386 tools on leopard/ppc.
>Fix: