Commits on Jul 19, 2023

1. Add support for using GHC's -jsem option …

   * The top-level user interface to enable the use of the semaphore is the
     `--semaphore` flag. If you pass `-j4 --semaphore` then cabal will
     create a semaphore with 4 slots which is passed to ghc using the
     `-jsem` option so that all GHC processes coordinate to use 4
     capabilities.
   
     - The semaphore logic is provided by a new package `semaphore-compat`
       which provides a cross-platform abstraction for semaphores.
   
   * The low level `./Setup.hs build` interface accepts the `--semaphore
     <SEMAPHORE>` option, which can be used to directly pass the semaphore
     you require to the Setup script.
   
   (cherry picked from commit 0a1c167)
   
   # Conflicts:
   #	Cabal/src/Distribution/Simple/Build.hs
   #	Cabal/src/Distribution/Simple/Compiler.hs
   #	Cabal/src/Distribution/Simple/GHC.hs
   #	Cabal/src/Distribution/Simple/GHCJS.hs
   #	Cabal/src/Distribution/Simple/Program/GHC.hs
   #	Cabal/src/Distribution/Simple/Setup.hs
   #	Cabal/src/Distribution/Simple/Setup/Build.hs
   #	bootstrap/linux-9.4.5.json
   #	cabal-install/src/Distribution/Client/Config.hs
   #	cabal-install/src/Distribution/Client/JobControl.hs
   #	cabal-install/src/Distribution/Client/ProjectBuilding.hs
   #	cabal-install/src/Distribution/Client/ProjectConfig.hs
   #	cabal-install/src/Distribution/Client/ProjectConfig/Legacy.hs
   #	cabal-install/src/Distribution/Client/ProjectConfig/Types.hs
   #	cabal-install/src/Distribution/Client/ProjectPlanning.hs
   #	cabal-install/src/Distribution/Client/Setup.hs
   #	cabal-install/tests/UnitTests/Distribution/Client/ProjectConfig.hs

   

   mpickering authored and mergify[bot] committed Jul 19, 2023
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