[ODE] universal binary for OS X?

[Aaron Geller]

Hi,

I'm hoping to compile a universal ODE binary for Mac, i.e. add "-arch  
ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk" to CFLAGS.

The first problem I encountered was the error: g++: -E, -S, -save- 
temps and -M options are not allowed with multiple -arch flags

I deleted the -M flags from the make rule for the first target  
(libode_a-obstack.o), and got the following:
powerpc-apple-darwin8-g++-4.0.1: libode_a-obstack.o: No such file or  
directory
powerpc-apple-darwin8-g++-4.0.1: .deps/libode_a-obstack.Tpo: No such  
file or directory
i686-apple-darwin8-g++-4.0.1: libode_a-obstack.o: No such file or  
directory
i686-apple-darwin8-g++-4.0.1: .deps/libode_a-obstack.Tpo: No such  
file or directory

... despite the fact that libode_a-obstack.o itself did build.

Before pressing on on my own I figured I'd ask the list: has anyone  
done this successfully yet?  How important are the -M flags?

Is there a right way to do this?

Thanks!!
Aaron