[Haskell-cafe] separate compilation for library profiling

[Henning Thielemann]

Why does GHC start a separate compilation when I build with cabal 
--enable-library-profiling? At least parsing and type-checking should be 
the same as in the non-profiling compilation. Why aren't these steps 
shared between profiling and non-profiling compilation?

I remember that in the past GHC also started a separate compilation for 
shared object generation. However, starting with GHC-7.8 dyn-files are 
just generated along with static compilation.