o don't link by default
o when generating profiling info, link gcrt1.o and specify "-no_new_main"
linker parameter
* don't use version-specific crt1.o files when targetting the
iPhoneSimulator platform
* don't link a crt1.o file when targetting iOS 6 or later
(all info from
http://llvm.org/svn/llvm-project/cfe/trunk/lib/Driver/Tools.cpp )
git-svn-id: trunk@25789 -