Using stringize and string concatenation in ghc preprocessing
allbery.b at gmail.com
Sat Aug 20 18:33:08 UTC 2016
On Sat, Aug 20, 2016 at 2:27 PM, Harendra Kumar <harendra.kumar at gmail.com>
> But "-optP" seems to only append to the flags that GHC already passes and
> gcc has no "-no-traditional" option to undo the effect of the
> "-traditional" that GHC has already passed. I think "-optP" should override
> the flags passed by ghc rather than appending to them. Is there a reason
> not to do that?
> Is there any other better way to achieve this? What is the standard way of
> doing this if any?
Removing -traditional will break much Haskell source. Go look at the
history of clang with ghc (clang doesn't do -traditional) to see what
happens. (tl;dr: without -traditional, cpp knows too much about what
constitutes valid C, and mangles and/or throws errors on valid Haskell that
doesn't lex the way C does.)
You might want to look at cpphs as an alternative preprocessor. There are
some ancient K&R-era hacks that could be used if absolutely necessary, but
cpphs should be a much simpler and cleaner solution.
brandon s allbery kf8nh sine nomine associates
allbery.b at gmail.com ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
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