Flag warnings show intermediate hscpp filenames on SmartOS

[Ben Gamari]

Karel Gardas <karel.gardas at centrum.cz> writes:

> Hi Alain,
>
> I guess you are hit by well known issue in GCC's CPP on Solaris. Just 
> verify here:
>
> https://gcc.gnu.org/ml/gcc/2014-08/msg00114.html
>
> solution in this case is simple: use configure option to set different 
> non buggy CPP as a CPP for GHC.
>
> Please let me know if this is the culprit,
>
Perhaps we should add an autoconf check to preempt this issue and point
affected users in the direction of a solution?

Cheers,

- Ben

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