Commits on Mar 13, 2023

1. Drop vfork support …

   `vfork` is something of a relic, originally introduced as a (rather
   unsafe) optimisation of `fork` in 3.0BSD, allowing the user to eliminate
   the cost of cloning the parent process's address space (as early BSDs
   would do) when `fork`ing with the intent of immediately `exec`ing.
   
   However, its design has long been considered a mistake (being nigh
   impossible to use safely in a multithreaded environment), its benefits
   have largely vanished (since modern operating systems rely on virtual
   memory to remap the parent's address space as copy-on-write instead of
   copying), and nearly all platforms now consider it to be an alias of
   `fork`.
   
   Remove `process`'s support for `vfork`.
   
   Fixes haskell#261.

   

   bgamari committed Mar 13, 2023
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