[Haskell-cafe] Error trying to build haskell-dbus on FreeBSD

[Brandon Allbery]

I've been complaining about that for years. Every so often there's
discussion of a non-GPLed alternative preprocessor, but the questions
apparently become fairly hairy quickly, so the current mess is just
accepted. :(

On Sat, Feb 1, 2020 at 10:19 AM Ben Franksen <ben.franksen at online.de> wrote:

> Am 01.02.20 um 11:36 schrieb Merijn Verstraaten:
> >
> >> On 1 Feb 2020, at 10:01, Viktor Dukhovni <ietf-dane at dukhovni.org>
> >> wrote:
> >>
> >> The package developer.  Neither GHC nor Clang are at-fault for
> >> invalid CPP macro syntax.
> >
> > This isn't the package developers fault. Standard Haskell just cannot
> > be properly preprocessed by an ISO C preprocessor. As the definition
> > of valid tokens just aren't compatible.
> >
> > GHC's use of the CPP has long (maybe since forever?) been
> > incompatible with CPP as standardised in the ISO C spec, and its
> > relies on the -traditional flag to make GCC use it's pre-ISO C
> > implementations. This flag isn't necessarily portable across C
> > compilers and I recall this breaking things in the past.
>
> This situation strikes me as being precarious. It means we rely on the
> gcc developers to retain the -traditional flag (with its current
> semantics). My personal experience makes me think that such reliance is
> ill-advised: breaking compatibility with anything other than C or C++
> source code is not regarded as a problem and bug reports to that effect
> are rejected as invalid.
>
> Cheers
> Ben
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-- 
brandon s allbery kf8nh
allbery.b at gmail.com
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