On Sat, Aug 20, 2016 at 2:27 PM, Harendra Kumar <harendra.kumar@gmail.com> wrote:

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@gmail.com ballbery@sinenomine.net

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