TITLE: Haskell Stack build multiple main

** Big Question ** How to build individual executable file

-- Build all executable *.hs
stack build 

-- Run the first *.hs
stack build First 

• RotateCube.hs

module RotateCube where

main = do

• SimpleCube.hs

module SimpleCube where

main = do

• Cable file

executable             rotateCube 
  hs-source-dirs:      src
  main-is:             RotateCube.hs
  ghc-options:         -O2 -main-is RotateCube
  cpp-options:         -DTEST
  default-language:    Haskell2010
  c-sources:           /Users/aaa/myfile/bitbucket/haskellffi/AronCLibFFI.c
  build-depends:       base >= 4.7 && < 5

executable             simpleCube 
  hs-source-dirs:      src
  main-is:             SimpleCube.hs
  ghc-options:         -O2 -main-is SimpleCube
  cpp-options:         -DTEST
  default-language:    Haskell2010
  c-sources:           /Users/aaa/myfile/bitbucket/haskellffi/AronCLibFFI.c
  build-depends:       base >= 4.7 && < 5