September 2002 - Hugs-Users

Hugs, Mac OS X 10.1.5, and pathnames
by Hamilton Richards 20 Feb '03

20 Feb '03

In OS X, pathnames have two distinct syntaxes. The GUI uses the pre-X syntax, in which a pathname begins with a volume name and the separator is `:', as in Macintosh HD:Users:ham:Documents:whatever.hs In the Darwin (i.e., unix) command-line "underworld", a pathname begins with /Volumes, spaces are escaped with `\', and the separator is `/', as in /Volumes/Macintosh\ HD/Users/ham/Documents/whatever.hs When you drag a file icon onto the command line, Terminal does the right thing-- it converts the pathname from the GUI syntax to the Darwin syntax, and utilities such as more work just as they should. Hugs, however, doesn't do so well. For example, Prelude> :l /Volumes/Macintosh\ HD/Users/ham/Documents/whatever.hs Reading file "/Volumes/Macintosh\": ERROR "/Volumes/Macintosh\" - Unable to open file "/Volumes/Macintosh\" Quoting the pathname changes the problem, but doesn't cure it: Prelude> :l "/Volumes/Macintosh\ HD/Users/ham/Documents/whatever.hs" ERROR - Missing `\' terminating string literal gap Apparently what's confusing Hugs is the `\', because removing it cures the problem: Prelude> :l "/Volumes/Macintosh HD/Users/ham/Documents/whatever.hs" Reading file "/Volumes/Macintosh HD/Users/ham/Documents/whatever.hs": Is this problem unavoidable, or is it just an oversight? Thanks, --Ham -- ------------------------------------------------------------------ Hamilton Richards Department of Computer Sciences Senior Lecturer Mail Code C0500 512-471-9525 The University of Texas at Austin Taylor Hall 5.138 Austin, Texas 78712-1188 ham(a)cs.utexas.edu hrichrds(a)swbell.net ------------------------------------------------------------------

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hugs ffi - question thats been bugging me for some time
by R. Legere 30 Dec '02

30 Dec '02

In docs/ffi-notes.txt, I find the following: ------------------------------------------------------------ o foreign export static is not implemented. You can code around this by writing: foreign import dynamic foo_dynamic :: Addr -> (A -> B -> C) foreign label foo_addr :: Addr foo = foo_dynamic foo_addr instead of: foreign import foo :: A -> B -> C ------------------------------------------------------------------------- Does anyone understand what this is saying? I can't grok it. The work around presented here seems to have nothing to do with foriegn export static. It looks like a workaround to not having foreign IMPORT static. (Which we of course dont need a workaround for :)). Is something extremely tricky going on or am i just dense? Anyway, just curious, I have not had any trouble working around by passing pointers to the C-side using foreign export dynamic. I have just wondered about this for a long long time :)

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FranTK installation
by Stephan Haugh 30 Sep '02

30 Sep '02

New to Haskell AND FranTK I am trying to install both. So far I have: 1. installed Hugs98 (seems to work) 2. installed TCL/TK (demos work fine) 3. installed FranTK that is were I am stuck. Since I am running Windows, I have modified tclhugs98.bat to point to the right directories. When I start tclhugs98 ..\demos\demos.lhs Hugs is really starting to load the files, but when it reaches frantk/src/TclHaskellSrc/Utils.hs it halts with the following message: ERROR "F:\Haskell\frantk\src\TclHaskellSrc\Utils.hs":61 - Definition of variable "updateIORef" clashes with import Variable updateIORef is indeed mentioned in the file BaseTypes.hs, and IORef.hs, which are loaded earlier on. I tried commenting updateIORef out of IORef.hs. That helps to load another dozen files or so. But then it hangs again, this time with the message: ERROR "F:\Haskell\frantk\src\FranSrc\MutSet.hs":40 - Cannot use type synonym in instance head Now I am really stuck. Has anybody managed to run the FranTK demo? Why is trying to start Hugs in Hugs-mode rather then Haskell98? I am grateful for any help . Cheers, Stephan

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Kanser tedavisi
by carctol＠yahoo.com 25 Sep '02

25 Sep '02

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E21, q2
by -3wojp 14 Sep '02

14 Sep '02

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SOE Graphics for SunOS/Solaris
by Koen Claessen 09 Sep '02

09 Sep '02

Dear Hugs user, I am trying to install the SOE graphics library for Solaris, but I am having no success. Everything compiles fine, but at run-time I get an error: >>> ERROR "graphics-2.0.4/lib/x11/Xlib_StdDIS.hs" - Error while importing DLL "/.../chalmers.se/fs/cab/cs/work/proj/multi/home/src/hugs/soe/graphics-2.0.4/lib/x11/Xlib_StdDIS.so": ld.so.1: runhugs: fatal: relocation error: file /usr/X11/lib/libX11.so.6.1: symbol authdes_create: referenced symbol not found <<< First, I thought it was a dynamic linking problem, so I added "-B static" to linker flags, recompiled, and then I got the following error: >>> ERROR "graphics-2.0.4/lib/x11/Xlib.hs" - Error while importing DLL "/.../chalmers.se/fs/cab/cs/work/proj/multi/home/src/hugs/soe/graphics-2.0.4/lib/x11/Xlib.so": ld.so.1: runhugs: fatal: relocation error: file /.../chalmers.se/fs/cab/cs/work/proj/multi/home/src/hugs/soe/graphics-2.0.4/lib/x11/Xlib.so: symbol XAllPlanes: referenced symbol not found <<< And then I gave up (I am not a Makefile hero). Anyone who has done this before who can help me? Thanks, /Koen. -- Koen Claessen http://www.cs.chalmers.se/~koen Chalmers University, Gothenburg, Sweden.

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