- jhc - Haskell.org

flag to type check only?
by David Roundy 04 Sep '09

04 Sep '09

Hi, I'm wondering if there's an option to stop after type checking? Somehow I thought there was. I know that jhc does all the type checking prior to compiling, but it'd be nice to be able to *just* do the type checking (e.g. for tests to see what modules are available, and what they export). -- David Roundy

1 0

darcs patch: introduce System.Exit and System.Cmd in base.
by David Roundy 04 Sep '09

04 Sep '09

Hi John, Here's a little patch to split System into System.Exit, System.Cmd and System.Environment. I'm not quite clear how haskell98 works, which still seems to provide System, but on the whole this seems to work. David Mon Aug 31 11:06:45 EDT 2009 David Roundy <droundy(a)darcs.net> * introduce System.Exit and System.Cmd in base.

2 1

Memory usage
by Taral 04 Sep '09

04 Sep '09

Stock compile of jhc results in running out of memory trying to make containers.hl (1GB RAM). :( Any ideas? -- Taral <taralx(a)gmail.com> "Please let me know if there's any further trouble I can give you." -- Unknown

2 1

darcs patch: fix grammatical error in warning message.
by David Roundy 02 Sep '09

02 Sep '09

Sorry to be a grammatical nit-picker, but "it's" means "it is", not the possessive... this always bothers me. David Wed Sep 2 15:23:12 EDT 2009 David Roundy <roundyd(a)physics.oregonstate.edu> * fix grammatical error in warning message.

1 0

darcs patch: include $PREFIX/{share, lib}/{jhc, jhc-$SHORTVERSION} in...
by David Roundy 02 Sep '09

02 Sep '09

I would also lean towards trimming the whole default search path down, but didn't want to go that far with an unsolicited patch. I'd probably vote to include just ~/lib/jhc:/usr/local/lib/jhc:/usr/lib/jhc:$PREFIX/lib/jhc:$PREFIX/lib/jhc-0.7 and move the default install into the last entry. Otherwise, it seems like you're asking for folks to get confused as to what packages are actually used. With my change, 16 locations are searched, which seems excessive, particularly as users can always add their own paths via an environment variable. David Wed Sep 2 12:28:53 EDT 2009 David Roundy <roundyd(a)physics.oregonstate.edu> * include $PREFIX/{share,lib}/{jhc,jhc-$SHORTVERSION} in search path. I find it a little annoying that the default search path doesn't include the location where I installed jhc, except the ../share/jhc-0.7 directory, which I'd rather not put stuff in, so I can easily delete all non-standard packages. I also took the liberty of reordering the default search path, so that all the ~/* entries would be before all the /usr/local/* entries, etc.

1 0

darcs patch: give nicer error message on jhc --show-ho foo
by David Roundy 02 Sep '09

02 Sep '09

Wed Sep 2 12:21:43 EDT 2009 David Roundy <roundyd(a)physics.oregonstate.edu> * give nicer error message on jhc --show-ho foo

1 0

darcs patch: make type of System.Info.compilerVersion match that of...
by David Roundy 02 Sep '09

02 Sep '09

Hi John, I don't like that ghc changed (somewhere around ghc 6) the type of compilerVersion, but it does seem best for jhc to match it, which means adding the Data.Version module. David Wed Sep 2 08:44:18 EDT 2009 David Roundy <droundy(a)darcs.net> * make type of System.Info.compilerVersion match that of ghc.

1 0

feature requests for franchise's benefit
by David Roundy 02 Sep '09

02 Sep '09

I've been looking into how to teach franchise to compile using jhc, and there are a few features that would make this much easier. The first is that I'd like a way to ask jhc what files a given compile will depend on. Something like gcc -M, although I don't care to have make syntax in the output. I don't really care about the format of the output, so long as it's easy to extract a list of files from it. Ideally, this would output *all* dependencies, including installed .hl files. I'm imagining this is the sort of output that could (hypothetically) be extracted from strace run on a successful compile. Incidentally, I'm thinking of enfranchise the libraries that come with jhc, which would allow them to be rebuilt automatically when the source is changed, rather than the current scheme of "rm *.hl; make libs". The above won't be so helpful for unsuccessful compiles, as will happen if certain modules are missing (e.g. they need to be generated from a .hsc file), so a second feature request would be to have a way of finding out from jhc what modules it can't find. These modules might either be generated files (e.g. from a .hs.in file or a .hsc file, or a user-written rule), or they might be defined in a package that needs to be included. For ghc, I get this information by parsing its error messages. It's not a very good solution, but works. I'd like a better solution with jhc, perhaps a flag to specify a file to output missing modules to? And finally, a nice way to find out which modules are exported by which packages. Perhaps something as simple as a --show-exports flag: jhc --no-auto -pbase-1.0 --show-exports Another interesting option for this feature would be to allow --show-ho to accept a package name such as base-1.0 and look up its .hl file using the same path that -p would. Then if the output of --show-ho were stable (and parsable), that would be sufficient. -- David Roundy

1 0

Fwd: [Haskell-cafe] Slow IO?
by Gwern Branwen 02 Sep '09

02 Sep '09

---------- Forwarded message ---------- From: Mark Wotton <mwotton(a)gmail.com> Date: Wed, Sep 2, 2009 at 1:08 AM Subject: Re: [Haskell-cafe] Slow IO? To: Eugene Kirpichov <ekirpichov(a)gmail.com> Cc: Steve <stevech1097(a)yahoo.com.au>, haskell-cafe(a)haskell.org On 02/09/2009, at 2:26 PM, Eugene Kirpichov wrote: >> > > I've got a Centrino Duo 2000 (I'm on a notebook), Ubuntu 9.04 and ghc 6.10.2. > > However, we have not set up on what exact input file we're using :) > I'm using one where it is written "10000000 3" and then 10000000 lines > of "999999999" follow. > > Also, I wonder what one'd get if one compiled this program with jhc, > but I don't know whether jhc is able to compile Data.ByteString. It couldn't last time I tried - choked on some INLINE pragmas. Might not be a massive job, but there aren't enough hours in the day... mark _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe(a)haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- gwern

1 0

darcs patch: fix bug when 'do' expressions used with infix expressi...
by John Meacham 01 Sep '09

01 Sep '09

Tue Sep 1 11:08:31 PDT 2009 John Meacham <john(a)repetae.net> * fix bug when 'do' expressions used with infix expressions, add test case to regression

1 0