Building GHC head with clang on Mavericks

[Carter Schonwald]

Ok.   Got it.  So some more patches were needed.

Pardon the asking, was somehow getting confused earlier.

On Tuesday, November 19, 2013, Kazu Yamamoto wrote:

> > Was there an issue if you used a wrapped clang and those patches or not?
> > I'm really confused.
>
> Even with GHC/clang-wrapper and alex/happy with Nick's patches, I
> cannot build GHC head. (I'm not using GCC 42 at all in this case.)
>
> AlexTemplate (pre-processed by clang) has linemarkers like this:
>
> ----
> # 1 "<built-in>"
> ----
>
> So, Lexer.hs generated from Lexer.x by alex also includes this one.
>
> Lexer.hs is CPP language extension. So, it is pre-processed again by
> clang. Since clang-wrapper specifies "-x assembler-with-cpp",
> generated Lexcer.hscpp contains:
>
> ----
>  # 1 "<built-in>"
> ----
>
> GHC cannot handle this, so build fails.
>
> My hack lets alex and happy not to produce linemarkers at all.
>
> Is this explanation clear to you?
>
> P.S.
>
> If we modify clang-wrapper to not convert "-x c" to "-x
> assembler-with-cpp", some other files which contains " #-}" cannot be
> compiled.
>
> --Kazu
>
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