haskell/cabal — pull request #996 by 23Skidoo (2012-08-10 19:04:02+00:00)
Title: Initialise the 'jobs' config file setting with the current number of CPU cores.

Fixes #982. Additionally, running `install -j` without the numerical argument
will have the same effect at runtime.

Side effect: `install -jNUM` doesn't work when there's a space between `-j` and
`NUM` (a peculiarity of the Cabal option parser).