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We've often talked about having a separate flag for language extensions,
and now we have one. You can say
-XImplicitParams
-X=ImplicitParams
-Ximplicit-params
as you like. These replace the "-f" flags with similar names (though
the -f prefix will serve as a synonym for -X for a while).
There's an optional "=", and the flag is normalised by removing hyphens
and lower-casing, so all the above variants mean the same thing.
The nomenclature is intended to match the LANGUAGE pramgas, which are
defined by Cabal. So you can also say
{-# LANGUAGE ImplicitParams #-}
But Cabal doesn't have as many language options as GHC does, so the -X
things are a superset of the LANGUAGE things.
The optional "=" applies to all flags that take an argument, so you can,
for example, say
-pgmL=/etc/foo
I hope that's ok. (It's an unforced change; just fitted in.)
I hope we'll add more -X flags, to replace the portmanteau -fglasgow-exts
which does everything!
I have updated the manual, but doubtless missed something.
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-fliberate-case-threshold dynamic
(Alas, Darcs failed to record my log-message for the above patch,
so this patch is an attempt to add the log message retrospectively.)
Parsing options numeric arguments, such as
-fliberate-case-threshold=30
for dynamic flags wasn't being handled well. I elaborated the
command-line parser to have a new constructor, OptIntSuffix, for this
case, and did the consequential changes.
This patch also makes the -fliberate-case-threshold flag into a
dynamic flag.
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-fliberate-case-threshold dynamic
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This allows you to put -fcontext-stack into an options pragma,
as requested by Trac #829
While I was at it, I added OptIntPrefix to the forms allowed
in CmdLineParser.
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Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.
The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level. The build system now makes no
pretense at being multi-project, it is just the GHC build system.
No doubt this will break many things, and there will be a period of
instability while we fix the dependencies. A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.
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