[GHC] #8493: Can't compile happy + ghc with clang's CPP

[GHC]

#8493: Can't compile happy + ghc with clang's CPP
----------------------------------------+----------------------------------
        Reporter:  maxs                 |            Owner:
            Type:  bug                  |           Status:  new
        Priority:  highest              |        Milestone:  7.8.1
       Component:  libraries (other)    |          Version:  7.7
      Resolution:                       |         Keywords:  happy clang
Operating System:  MacOS X              |     Architecture:
 Type of failure:  Building GHC failed  |  Unknown/Multiple
       Test Case:                       |       Difficulty:  Unknown
        Blocking:                       |       Blocked By:
                                        |  Related Tickets:
----------------------------------------+----------------------------------

Comment (by kazu-yamamoto):

 I'm using GHC 7.6.3 with the wrapper on Mavericks.

 I can compile happy 1.19.0 in this environment.
 I can even build GHC head in this environment, too.

 If there is something I can verify, please tell me.

 P.S.

 I got the following warning when configuring happy 1.19.0:

 {{{
 % cabal configure
 Resolving dependencies...
 [1 of 1] Compiling Main             ( Setup.lhs, dist/setup/Main.o )
 Linking ./dist/setup/setup ...
 Configuring happy-1.19.0...

 /var/folders/k0/548g5xg90jjfbrj5j09nvwv80000gq/T/4321.c:1:12:
      warning: control reaches end of non-void function [-Wreturn-type]
 int foo() {}
            ^
 1 warning generated.
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8493#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler