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



Yes I checked the versions of gcc, both are 4.0.1, and the includes paths look the same. Same Xcode 2.2.1, installed on both machines the same day (the PPC was an upgrade).


On May 26, 2006, at 1:36 PM, Kevin Van Vechten wrote:

What do you mean by slightly different output? It'd help to know what differences you're seeing.

Also, have you checked that both versions of gcc/g++ are the same (gcc -v)? That might account for subtle differences.

- Kevin

On May 26, 2006, at 12:30 PM, Paul Archibald wrote:

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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References: 
 >Is there a way to determine what default options are passed to g++? (From: Paul Archibald <email@hidden>)
 >Re: Is there a way to determine what default options are passed to g++? (From: Kevin Van Vechten <email@hidden>)



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