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Is there a way to determine what default options are passed to g++?

Comrades,

Does anyone know how to show the default options that are passed to gcc/g++? I am building a universal binary, and I get slightly different output depending on whether I build it on my PPC Powerbook or this IntelMini loaner. I am really close, The Intel build works on the IntelMini and the PPC, but the PPC build only works on the PPC. I want the PPC build to be portable, too.

This is the compiler command from the makefile:

$(TARGET): $(OBJECTS)
g++ -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk - o $@ -dynamiclib -install_name $(DESTDIR)/$@ $^
strip -x $@

%.o: %.cpp
g++ -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk - c -O2 -o $@ $^ -I /System/Library/Frameworks/JavaVM.framework/Headers

I think the fix is to add something to the options list that will force both compilers (Intel and PPC) to generate exactly the same output. I just don't know what that something is.

Anybody have any idea?
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