[CMake] Specifying build architectures on Mac OS X (ppc7400 does not work?)

[Sean McBride]

On 2007-05-15 14:22, Bill Hoffman said:

>Did you try a make VERBOSE=1 to see what flags were being used during 
>the building of stuff to find out where it went wrong?

Hi Bill,

Thanks for your quick reply.  I have just tried your suggestion.  I
changed one vtk source file: vtkImageReslice.cxx.  I did "make
VERBOSE=1".  It sure is verbose. :)  The relevant parts seem to be:

---------
[ 20%] Building CXX object Imaging/CMakeFiles/vtkImaging.dir/vtkImageReslice.o

/usr/bin/c++   -arch ppc7400 -arch i386 -isysroot /Developer/SDKs/
MacOSX10.4u.sdk <SNIP>

Linking CXX static library ../bin/libvtkImaging.a

cd /Users/sean/kitware/VTK-pristine-bin/Imaging && /Users/sean/kitware/
CMake-install/bin/cmake -P CMakeFiles/vtkImaging.dir/cmake_clean_target.cmake

cd /Users/sean/kitware/VTK-pristine-bin/Imaging && /Users/sean/kitware/
CMake-install/bin/cmake -E cmake_link_script CMakeFiles/vtkImaging.dir/
link.txt --verbose=1

/usr/bin/ar cr ../bin/libvtkImaging.a  <SNIP> "CMakeFiles/vtkImaging.dir/
vtkImageReslice.o" <SNIP>

/usr/bin/ranlib ../bin/libvtkImaging.a 
---------

It seems to be passing "-arch ppc7400" correctly.  Also,

lipo -info /Users/sean/kitware/VTK-pristine-bin/Imaging/CMakeFiles/
vtkImaging.dir/vtkImageReslice.o

says:

Architectures in the fat file: /Users/sean/kitware/VTK-pristine-bin/
Imaging/CMakeFiles/vtkImaging.dir/vtkImageReslice.o are: ppc7400 i386 

Good, the .o file is ok!  Yet,

lipo -info /Users/sean/kitware/VTK-pristine-bin/bin/libvtkImaging.a 

incorrectly gives:

Architectures in the fat file: /Users/sean/kitware/VTK-pristine-bin/bin/
libvtkImaging.a are: ppc i386 

Could 'ar' or 'ranlib' have done something weird?

-- 
____________________________________________________________
Sean McBride, B. Eng                 sean at rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada