May 2004 - Hugs-Users

Problem with Hugs
by Matteo Capelletti 21 May '04

21 May '04

Dear All, I just started using Haskell and Hugs, I work with Linux Mandrake 9.1 and I have a problem with the console: Is there a way to set up Hugs in such a way that I can move the cursor using the arrows, or repeat the last command by up-arrow? I have not been able to do this and it is quite hard to use Hugs without this option, since I always have to write again any command (I found a command $$ to repeat the last, but it's not exactly what I need), I cannot make corrections, since I cannot go back... and so on. I hope someone can help me Thank you very much Matteo

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Re: [HOpenGL] GHC 6.2.1 Binding Completeness
by Sven Panne 05 May '04

05 May '04

[ I'm cross-posting this, perhaps some kind soul has binary snapshots available. ] Yann Morvan wrote: > [...] I recently installed the last version of GHC (6.2.1) that comes > with the new OpenGL binding. I was just starting to port my code to it, > but I have trouble finding some basic functionnalities (like glTexImage2D for > instance). Is that binding incomplete ? Alas, no, the OpenGL binding on the release branch is not complete. > If yes when will it be finished ? If no when will the redbook examples be ported to it ? The story is quite a bit different on the main branch, the binding is almost finished there, you get OpenGL 1.5 plus a few dozen extensions. The only missing bit is currently NURBS, but it's already halfway there. We generally don't merge new features onto the release branch, only bug fixes, hence the difference. Currently there are "official" releases including this, but if you can tell a bit about your intended platform, perhaps somebody else on the GHC/Hugs mailing lists can help (Linux, WinDoze, MacOS X and Solaris reportedly work). I can offer bleeding edge snapshots of Hugs and GHC including the latest and greatest OpenGL/GLUT binding compiled for x86 Linux (SuSE 9.1, don't know if the RPMs work on other platforms). Another option is building GHC and/or Hugs from CVS for yourself, which is not that hard nowadays (at least if you have enough GB and GHz :-), see: http://haskell.org/ghc/docs/latest/html/building/building-guide.html > I am reduced to greping the code of the binding for calls to the C openGL > functions and suspect that I am missing things. Thanks to Haddock, there is no need for grep-ing. I keep the docs on http://haskell.org/HOpenGL/newAPI/ fairly actual, and the GHC packages include similar documentation. Cheers, S.

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Re: Setting Search Path doesn't persist in WinHugs
by Greg Ballinger 05 May '04

05 May '04

AHA, I found the problem. When starting the WinHugs.exe file directly in C:\Program Files\Hugs98 it does use the persisted search path. However when starting it via the shortcuts installed in the Windows Start Menu system it does not. Evidently the shortcut in the menu uses an empty -P option when starting WinHugs. Sigbjorn Finne told me "I'll fix this in the next release, but creating your own shortcuts sounds like the simplest way out." For those unfamiliar with creating Windows shortcuts, an easy way to do this is: 1) navigate to the WinHugs.exe file, 2) right-click, 3) select Send to desktop (Create shortcut). 4) drag or copy the shortcut to wherever you want it. If you wish to set WinHugs command line options in your shortcut 1) right-click on the shortcut after you have created it 2) select Properties 3) Type your selected command line options at the end of target line Example: "C:\Program Files\Hugs98\winhugs.exe" +t will cause WinHugs to display the result and type of each expression entered at the Hugs prompt: Hope this is helpful and not too elementary. --Greg Ballinger

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