Do not #include external header files when compiling via C

This has several advantages:

 - -fvia-C is consistent with -fasm with respect to FFI declarations:
   both bind to the ABI, not the API.

 - foreign calls can now be inlined freely across module boundaries, since
   a header file is not required when compiling the call.

 - bootstrapping via C will be more reliable, because this difference
   in behavour between the two backends has been removed.

There is one disadvantage:

 - we get no checking by the C compiler that the FFI declaration
   is correct.

So now, the c-includes field in a .cabal file is always ignored by
GHC, as are header files specified in an FFI declaration.  This was
previously the case only for -fasm compilations, now it is also the
case for -fvia-C too.

1 files changed, 0 insertions, 2 deletions

diff --git a/rts/StgRun.h b/rts/StgRun.h
index da376b4971..12d1475d13 100644
--- a/rts/StgRun.h
+++ b/rts/StgRun.h
@@ -11,6 +11,4 @@
 
 extern StgRegTable * StgRun(StgFunPtr f, StgRegTable *basereg);
 
-RTS_FUN(StgReturn);
-
 #endif /* STGRUN_H */