[Fink-devel] test for Xcode 4.3

[Jack H. <ho...@br...>]

   In adjusting the current valgrind packaging to build if Xcode 4.3
or later is present...

http://sourceforge.net/tracker/?func=detail&aid=3494843&group_id=17203&atid=414256

I settled on the following construct...

if [ `readlink /usr/bin/cc` != "clang" ] 
then
export CC=llvm-gcc-4.2
fi

I think this is the most concise test for us to use in testing for clang3.1svn
as Xcode 4.3 is the first release with /usr/bin/cc and /usr/bin/c++ symlinked
to clang and clang++ respectively. We should use this test for any other
packages in 10.7 currently using llvm-gcc-4.2 that can now be compiled with
clang 3.1svn.
     Jack