GHC driver behaviour switch

[Simon Marlow]

kyra wrote:

> GHC HEAD:
> 
> SysTools.runCc dflags (
>    -- force the C compiler to interpret this file as C when
>    -- compiling .hc files, by adding the -x c option.
>    -- Also useful for plain .c files, just in case GHC saw a
>    -- -x c option.
>        [ SysTools.Option "-x", SysTools.Option "c"] ++ ...
> 
> This completely breaks my build infrastructure. Could it be reversed?

The reason for this change is that you can now say

   $ ghc -x c foo.wibble -c

and have foo.wibble treated as a .c file by GHC.

To fix this properly we should have a C++ compiler phase in 
DriverPipeline, it wouldn't be too hard.  Care to submit a bug report 
with this info?

Cheers,
	Simon