Re: CPP usage in GHC.

12 Aug 2014

      Actually probably not debris leftover but needed code. I just removed -x 
assembler-with-cpp and got this:

gcc: ghc/Main.hs: linker input file unused because linking not done

so we definitely need some -x to set language even for GNU C. Tested 
also with old 3.4.x. From langs available, assembler-with-cpp looks like 
the best option unfortunately...

Karel

On 08/12/14 01:35 AM, Carter Schonwald wrote:
...
Oooooo.  Then it's possibly debris leftover from Austin's initial clang
compatibility work predating the improvements via the settings file work.
I'm Afk right now, but that probably can be safely removed from ghc,
especially since the configure script for clang cpp adds that anyways
now I think?  I might be wrong though.
On Monday, August 11, 2014, Karel Gardas mailto:karel.gardas@centrum.cz> wrote:
On 08/11/14 11:18 PM, Carter Schonwald wrote:
why should this flag be passed to cpp when invoked on HS files?
        It'd be
        easy to expose another field in the settings file for this other
        invokecation.. though i should look more closely at the use site
        before
        opinining :)
Hmm, isn't doCpp function what's invoked when cpp is invoked for HS
    files? If so, then -x assembler-with-cpp is already used for HS
    files anyway.
Karel
On Mon, Aug 11, 2014 at 4:27 PM, Karel Gardas
        mailto:karel.gardas@centrum.cz> wrote:
On 08/11/14 08:48 PM, Carter Schonwald wrote:
What i'm hearing you say is we actually need TWO sets
        of CPP
                 flags, one
                 for normal haskell, and another for the CPP used on the
        assembler?
                 wheres this hardcoding?
DriverPipeline.hs -- grep for "assembler-with-cpp" and you
        will find it.
IMHO best would be to move this "-x assembler-with-cpp"
        into the
             hs-cpp-flags managed by configure. This way it may be even
        possible
             to use system supplied plain cpp instead of cpp builtinto
        GNU C.
Karel