Automatically install cpphs when not present

[DanBurton]

Same as #16.

For example, building stack itself requires cpphs.

Downloading monad-unlift-0.1.1.0...
Configuring monad-unlift-0.1.1.0...
Building monad-unlift-0.1.1.0...
Installed monad-unlift-0.1.1.0
Configuring stack-0.0.0...
Failed to install stack-0.0.0
Build log ( /usr/src/.cabal-sandbox/logs/stack-0.0.0.log ):
Configuring stack-0.0.0...
setup-Simple-Cabal-1.18.1.5-x86_64-linux-ghc-7.8.4: The program cpphs is
required but it could not be found.

[snoyberg]

Notice that you've pasted a cabal build log. Stack should already support
this.

On Tue, Jun 2, 2015, 12:28 AM Dan Burton [email protected] wrote:

Same as #16 #16.

For example, building stack itself requires cpphs.

Downloading monad-unlift-0.1.1.0...
Configuring monad-unlift-0.1.1.0...
Building monad-unlift-0.1.1.0...
Installed monad-unlift-0.1.1.0
Configuring stack-0.0.0...
Failed to install stack-0.0.0
Build log ( /usr/src/.cabal-sandbox/logs/stack-0.0.0.log ):
Configuring stack-0.0.0...
setup-Simple-Cabal-1.18.1.5-x86_64-linux-ghc-7.8.4: The program cpphs is
required but it could not be found.

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#156.

[snoyberg]

Closing as wontfix, as the reported issue is a cabal bug (haskell/cabal#220 to be precise). If this is reproducible with stack, please reopen.