osx - How can I compile GCC on a mac so compiled executables will work on earlier versions of OS X? -

I am trying to create a program (dwarf fort) which uses C ++ 0x features Not well supported XCode's latest leopard version like using GCC 4.5 has also given a significant speed boost, we have decided to build our own.

However, due to this, due to not working on the resulting executable Tiger, GCC is being made against the Leopard SDK, not the Tiger SDK installed, which is fair but annoying. How do I make it against Tiger?

You have to pass the mmacosx-version-min = 10.5 for the lid, which is appropriate in Liby Ask to link against symbols.