November 2006 - Yhc - Haskell.org

Building yhc failed
by Echaozh Zhang 01 Dec '06

01 Dec '06

I'm trying to build yhc on my debian machine. When I'm executing scons build, it reports the following error: $ scons build scons: Reading SConscript files ... Building version 0.7.0-20061129043224-custom. Checking for architecture... (cached) x86 Checking for operating system... (cached) linux2 Checking for C header file gmp.h... (cached) yes Checking for mpz_t integ; mpz_init (integ) in C library gmp... (cached) yes Checking for libgmp version... (cached) Bootstrapping... build/SConscript.depends -> depends/SConscript build/SConscript.cpphs -> depends/cpphs/SConscript build/SConscript.filepath -> depends/filepath/SConscript build/SConscript.ctypes -> depends/ctypes/SConscript build/SConscript.libffi -> depends/ctypes/libffi/SConscript build/ffih/fficonfig.h -> depends/ctypes/libffi/fficonfig.h build/ffih/ffi.h -> depends/ctypes/libffi/include/ffi.h build/ffih/cfield.c -> depends/ctypes/libffi/src/cfield.c bootstrap/packages/yhc-base/1.0/Prelude.hi -> src/packages/yhc-base-1.0/Prelude.hi bootstrap/packages/yhc-base/1.0/PreludeBuiltin.hi -> src/packages/yhc-base-1.0/PreludeBuiltin.hi bootstrap/packages/yhc-base/1.0/YHC/Internal.hi -> src/packages/yhc-base-1.0/YHC/Internal.hi bootstrap/packages/yhc-base/1.0/Data/Ratio.hi -> src/packages/yhc-base-1.0/Data/Ratio.hi Done. scons: done reading SConscript files. scons: Building targets ... Getting dependencies for src/compiler98/Bind.hs. Getting dependencies for src/compiler98/Util/Text.hs. ghc -i./src/compiler98 -i./src/libraries/general -i./src/libraries/core -idepends/cpphs -idepends/filepath -i./src/interactive -package mtl -fwarn-missing-signatures -c src/compiler98/Util/Text.hs -o src/compiler98/Util/Text.o ghc-6.6: unknown package: mtl scons: *** [src/compiler98/Util/Text.o] Error 1 scons: building terminated because of errors. What's the problem? Can anyone help me with it?

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YCR2JS Programmers Guide Draft available
by Dimitry Golubovsky 22 Nov '06

22 Nov '06

Hi, I have finished typing in the draft of low-level programming guide for Yhc Core to Javascript converter. Everyone interested in future use of this tool is encouraged to read and review the Guide. Its purpose is to give some ideas about interaction of Haskell programs converted into Javascript with a web browser on the lowest possible level, without application frameworks and support libraries (just because these haven't been developed). Any feedback and ideas are appreciated. The document is located at: http://haskell.org/haskellwiki/Yhc/Javascript/Programmers_guide Thanks. -- Dimitry Golubovsky Anywhere on the Web

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Yhc.Core -> Haskell/Javascript/C
by Neil Mitchell 20 Nov '06

20 Nov '06

Hi, We currently have a Yhc.Core library which does loading/saving/printing/playing on the Yhc.Core type. We are slowly begining to add some analysis methods into Yhc.Core (saturation, strictness) where they can be implemented in a way which is not specific to any particular back end, and are generally useful. We now also want to add some convertors in, particularly a convertor to Javascript (which is already written), Haskell (which I have floating around, and need to refine) and C (I have the start of this done). The question is where to put them? I can think of two options: * Add a corejavascript library, and export Yhc.Core.Javascript from that, ditto one for each of the convertors. * Or alternatively add them to the existing Yhc.Core library. What do people think? I was also thinking of writing a tool, ycr, which allows these various analysis methods to be invoked and convertors - mainly for internal testing and development work. Thanks Neil

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new buildbot
by Alec Berryman 16 Nov '06

16 Nov '06

I'd like to set up a buildbot for yhc on an amd64 machine running Debian/testing. yhc compiles fine on the machine; would someone please send me a user/password?

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YCR2JS and Safari
by Dimitry Golubovsky 14 Nov '06

14 Nov '06

Someone replied to me in Russian about his experience with Safari and my Echo demo page that I fixed for Opera. Here is the rough translation: ======= I have just downloaded a fresh alpha of Safari. I could see the input form, but no Roman numerals, only Arabic. Safari now has got a debugger! The debug window popped up (without any explanations), first at the line 214 (from the beginning of the file), then at the line 150 (after "Continue" was pressed) and then an Arabic numeral appeared, and it "calmed down". ======= The original of the Russian discussion is here: http://community.livejournal.com/ru_lambda/28333.html Line 214 is within exprEval. Line 150 is within the HSFun constructor: var res = this._b.apply (this,this._a); I have never seen Safari debugger popups and have little idea what amount of information they bring up (but I'm guessing, close to none). I have posted my question on the comp.lang.javascript newsgroup last night but haven't seen any meaningful response yet. Anyway, I am going to work on Javascript code size optimizations, so after I am done we may try to retest it on Safari and see if anything changes. -- Dimitry Golubovsky Anywhere on the Web

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YCR2JS and Safari
by Dimitry Golubovsky 14 Nov '06

14 Nov '06

Malcolm wrote: > This demo page appears totally blank to me. (Using Safari under MacOS X > 10.4.8). The Javascript console tells me there was a "Type Error line 1". I wish it could tell line1 of what: of the first script or whatever else (MSIE reports line number of the whole HTML). But it probably won't tell. I also received a message about some weird error in Opera. There is indeed a much smaller test (if the script size is a real problem) which just outputs into the browser's status line: http://www.golubovsky.org/repos/yhc/src/translator/js/test/Test1.html The source is here: http://www.golubovsky.org/repos/yhc/src/translator/js/test/Test1.hs It should output this (absolute nonsense) in the status line: aaa,bbb,ertyuedacdabyrvalg Does at least this one work? -- Dimitry Golubovsky Anywhere on the Web

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buildbot failure in slack_x86
by andrewjwilkinsonw＠gmail.com 14 Nov '06

14 Nov '06

The Buildbot has detected a failed build of slack_x86. Full details are available at: http://www.indiegigs.co.uk:8010/slack_x86/builds/330 Buildbot URL: http://www.indiegigs.co.uk:8010/ Build Reason: Build Source Stamp: HEAD Blamelist: golubovsky(a)gmail.com BUILD FAILED: failed darcs sincerely, -The Buildbot

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ANN YCR2JS, a Yhc Core to Javascript Converter
by Dimitry Golubovsky 13 Nov '06

13 Nov '06

Hi, Ycr2js is a sub-project within the York Haskell Compiler (Yhc) project. It is aimed to create a tool to convert an arbitrary Haskell program into Javascript which in turn may be executed in any Web browser. I am pleased to announce that, with great amount of help from the Yhc Team, the converter has been integrated into the Yhc project, and initial stage of coding and development has been completed. Interested members of the Haskell community are invited to experiment with the Converter. It can be obtained with current Yhc snapshot from http://darcs.haskell.org/yhc At this point, it is possible to convert a Haskell program into Javascript and create a XHTML page for viewing in a Web browser. No framework is available to access DOM in type safe way, and/or support for AJAX. Not all low-level primitives have been mapped to Javascript or optimized for the Javascript environment. These are tasks for next stages and will be worked on in near future. It was by no means only my idea to generate Javascript from Haskell. Several people expressed this idea earlier in blogs and mailing lists. I was interested in this myself, and just decided to go ahead and implement it. Documentation (partially written) is available: http://haskell.org/haskellwiki/Yhc/Javascript At the moment of this announce, there is one live demo: http://darcs.haskell.org/yhc/web/jsdemos/Echo.html also referred to from the Wiki page mentioned. Type any text in the input field provided, and see it echoed right above after Enter is pressed. Just for fun, type any decimal number and see it converted to a Roman number, and vice versa. Roman numerals module (C) Malcolm Wallace, originally from ftp://ftp.cs.york.ac.uk/pub/haskell/contrib/Roman.hs On not so fast computers, the demo may show some delays (e. g. 3 - 5 seconds on a 375 MHz Intel Celeron, Netscape7, Linux) between the text is typed and echoed (mostly due to Roman number conversion). This is being worked on. Ycr2js is work in progress. What is most needed is users feedback that would help improve it. Any feedback will be greatly appreciated. Thanks everyone who helped me in any way. Feel free to contact me at golubovsky(a)gmail.com -- Dimitry Golubovsky Anywhere on the Web

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Testing QuickCheck properties with Yhc
by Isaac 10 Nov '06

10 Nov '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I made a script for testing QuickCheck properties in a module by adding a line to that file that contains a function _automatedQuickCheckMainWhichCanBeDeletedWheneverYouWantButPleaseDoNotChangeThisLineBecauseItMightConfuseTheStupidScriptThatProcessesIt :: IO () which tests all properties found in the file when run. (let us call that ridiculously long name $TESTMAIN_NAME from now on) To test using ghc, I pass the argument - -main-is $MODULE_NAME.$TESTMAIN_NAME (where $MODULE_NAME is found out by the script). To test using Hugs, I do `echo "$TESTMAIN_NAME" | hugs`. Any advice on how to do the same thing for Yhc -- execute an IO action defined in the top level of an arbitrary module, but not exported from the module? Isaac P.S. I'm attaching the script... I'll probably release it officially some time if I clean it up (e.g. find a good way to do it in a better and more portable language, like Haskell, maybe? and add some options) P.P.S. I made this because I didn't like the only existing one I could find, which didn't even work for me without some hacking. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFUmdbHgcxvIWYTTURAoJZAJ9L4Tlrnxmt2ugneJaDnlt6IMQNgACfdHmq UOAvdTJ5TSIQBtkroMLArsI= =neb8 -----END PGP SIGNATURE-----

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Changes to build/SConscript.libffi, prepend include path
by Goetz Isenmann 10 Nov '06

10 Nov '06

Hi! I got errors during the ctypes libffi build, because the preprocessor found ffi header files in /usr/local/include before those shipped with ctypes. Prepending the path to the internal header files instead of appending it fixed this issue for me. -- Goetz Isenmann

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