In practice this means:
* Always using -g flag.
* Embedding -cclib -lstdc++ into the corresponding cma/cmxa file.
This also moves -lstdc++ in a single place.
* Using caml_named_value instead of a homegrown mechanism.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220843 91177308-0d34-0410-b5e6-96231b3b80d8