[GHC] #7463: [PATCH] When -keep-hc-files is enabled, foreign stubs *_stub.c should also be kept.

[GHC]

#7463: [PATCH] When -keep-hc-files is enabled, foreign stubs *_stub.c should also
be kept.
-----------------------------+----------------------------------------------
Reporter:  PHO               |          Owner:                  
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  Compiler        
 Version:  7.6.1             |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  Other             |      Blockedby:                  
Blocking:  3472              |        Related:                  
-----------------------------+----------------------------------------------
 GHC used to put `*_stub.c` into `stubdir` along with `*_stub.h` but now
 `*_stub.c` files are temporarily created and then removed, which means we
 have no stubs available when we are bootstrapping a compiler via C
 sources.

 My
 [https://github.com/phonohawk/ghc/commit/680f44a4d325075cd26e9dd4c2fca1ee837847fe
 patch] is to keep `*_stub.c` as before, when `-keep-hc-files` is enabled:
 {{{
 % git fetch git://github.com/phonohawk/ghc.git c-sources-in-stubdir
 }}}

 Please also note that
 [http://www.haskell.org/ghc/docs/latest/html/users_guide/ffi-ghc.html
 #foreign-export-ghc the documentation about foreign stubs] is slightly
 outdated.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7463>
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