Cross-building -current on Mac OS X?

[Chris Ross <cross+netbsd%distal.com@localhost>]

  I know this is a touchy thing sometimes, and because of the way  
Apple does things it's hard to track and keep working.  Is this a  
known issue?

  I was trying to build last night's -current (for macppc) on a  
darwin 9.8.0 (Mac OS X 10.5.8) PPC system.  gcc 4.0.1 is the gcc in my  
path, and assumedly the one used.  There may be others available.

  It ended up crashing working in libc:

#   compile  libc/Lint_swapcontext.ln
CC=/var/tmp/NetBSD/data/NetBSD/src-current/tooldir.Darwin-9.8.0- 
Power_Macintosh/bin/powerpc--netbsd-gcc /var/tmp/NetBSD/data/NetBSD/ 
src-current/tooldir.Darwin-9.8.0-Power_Macintosh/bin/powerpc--netbsd- 
lint -chapbxzFS -X 272 -d /var/tmp/NetBSD/data/NetBSD/src-current/ 
destdir.macppc/usr/include  -D_LIBC -DLIBC_SCCS -DSYSLIBC_SCCS - 
D_REENTRANT -DHESIOD -DINET6 -DNLS -DYP -I/data/NetBSD/src-current/lib/ 
libc/include -I/data/NetBSD/src-current/lib/libc -I/data/NetBSD/src- 
current/sys -I/data/NetBSD/src-current/lib/libc/compat/stdlib -I/data/ 
NetBSD/src-current/lib/libc/compat/../stdlib -I/data/NetBSD/src- 
current/lib/libc/../../common/lib/libc/quad -I/data/NetBSD/src-current/ 
lib/libc/../../common/lib/libc/string -I/data/NetBSD/src-current/lib/ 
libc/../../common/lib/libc/arch/powerpc/string -D__DBINTERFACE_PRIVATE  
-I/data/NetBSD/src-current/libexec/ld.elf_so -I/data/NetBSD/src- 
current/lib/libc/dlfcn -I/data/NetBSD/src-current/lib/libc/gdtoa - 
DNO_FENV_H -I/data/NetBSD/src-current/lib/libc/arch/powerpc/gdtoa - 
DWITH_RUNE -I/data/NetBSD/src-current/lib/libc -DPOSIX_MISTAKE - 
DCOMPAT__RES -DUSE_POLL -DPORTMAP -DWIDE_DOUBLE -DALL_STATE - 
DUSG_COMPAT -D_FORTIFY_SOURCE=2    -i /data/NetBSD/src-current/lib/ 
libc/gen/Lint_swapcontext.c
/var/tmp/NetBSD/data/NetBSD/src-current/destdir.macppc/usr/include/ 
powerpc/ansi.h(71): warning: integral constant too large [56]
/data/NetBSD/src-current/sys/sys/sigtypes.h(61): warning: integral  
constant too large [56]
/var/tmp/NetBSD/data/NetBSD/src-current/destdir.macppc/usr/include/ 
powerpc/mcontext.h(46): warning: integral constant too large [56]
/var/tmp/NetBSD/data/NetBSD/src-current/destdir.macppc/usr/include/ 
powerpc/mcontext.h(89): warning: integral constant too large [56]
[...]

  Anyone know if this is expected, easy to fix, or what I should do  
to avoid it?  Thanks...

                             - Chris