- Haskell-Cafe - Haskell.org

Volunteer
by Xiao-Yong Jin 06 Apr '09

06 Apr '09

Hi, I learned that no one is doing generic unix source tarball, right now, and thought I might help to get it start. I have decent skills on Makefile, but knows very little about auto-tools. I can only spent a few hours every week on it, because I don't have too much spare time as a PhD student. But I still want to help, since it is quite important for Haskell to distribute as widely as possible. So, how should I start? I learned that ghc supports quite a lot of platforms in its tier2 support list through community supporters. I'm not sure what is the most convenient way to combine these into a generic source tarball. And what do we use to bootstrap ghc? Some pre-compiled binary? I'm not sure how I should start. Any insight? Best, Xiao-Yong P.S. I tried to send to haskell-platform, but got rejected. What's going on? ---------- begin error message ---------- ... while talking to community.haskell.org.: >>> DATA <<< 550 Unrouteable address 550 5.1.1 <haskell-platform(a)projects.haskell.org>... User unknown <<< 503 valid RCPT command must precede DATA ---------- end error message ---------- -- c/* __o/* <\ * (__ */\ <

2 1

Configuring cabal dependencies at install-time
by Jeff Heard 06 Apr '09

06 Apr '09

Is there a way to do something like autoconf and configure dependencies at install time? Building buster, I keep adding dependencies and I'd like to keep that down to a minimum without the annoyance of littering Hackage with dozens of packages. For instance, today I developed an HTTP behaviour and that of course requires network and http, which were previously not required. I'm about to put together a haxr XML-RPC behaviour as well, and that of course would add that much more to the dependency list. HaXml, haxr, and haxr-th most likely. so... any way to do that short of making a bunch of separate packages with one or two modules apiece? Otherwise I'm thinking of breaking things up into buster, buster-ui, buster-network, buster-console, and buster-graphics to start and adding more as I continue along. -- Jeff

1 0

GHC accepts libraries compiled with Visual Studio?
by Peter Verswyvelen 06 Apr '09

06 Apr '09

To my surprise GHC seems to accept .lib files (produced by e.g. Visual Studio on Windows) directly; I don't need to convert these to .a files using e.g. reimp That's really cool. Is this by design or did I miss something? The manual does not seem to mention this.

2 1

Re: Linking hmatrix without LAPACK
by Duane Johnson 06 Apr '09

06 Apr '09

Hi Alberto! Thanks for your informative reply. I looked in to the versions of liblapack on my system... it turns out there is indeed a liblapack.dylib that (apparently) comes with Mac OS X. How to tell ghc to link to that instead is still in question. I can run simple matrix operations in ghci as you suggest (in fact, "runTests 20" succeeds wonderfully); however, I created the following simple module (test.hs) and it fails: > module Main where > import Numeric.LinearAlgebra.Tests > > main = do > runTests 20 I tried plain "--make", as well as the "-dynamic" flag, and then I tried the "-L" shell argument to point to the /usr/lib dir where the liblapack.dylib library is located: > $ ghc --make test.hs -o test > [1 of 1] Compiling Main ( test.hs, test.o ) > Linking test ... > ld: in /opt/local/lib/liblapack.a( > ), not a valid archive member > collect2: ld returned 1 exit status > > $ ghc --make -dynamic test.hs -o test > Linking test ... > ld: library not found for -lHShmatrix-0.5.0.1-ghc6.10.1 > collect2: ld returned 1 exit status > > $ ghc --make -L/usr/lib test.hs -o test > Linking test ... > Undefined symbols: > "_zgemm_", referenced from: > _multiplyC in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_zgesv_", referenced from: > _linearSolveC_l in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_zpotrf_", referenced from: > _chol_l_H in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_dpotrf_", referenced from: > _chol_l_S in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_dgemm_", referenced from: > _multiplyR in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_dgesv_", referenced from: > _linearSolveR_l in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_zgetrf_", referenced from: > _lu_l_C in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_zgetrs_", referenced from: > _luS_l_C in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_dgetrf_", referenced from: > _lu_l_R in libHShmatrix-0.5.0.1.a(lapack-aux.o) > "_dgetrs_", referenced from: > _luS_l_R in libHShmatrix-0.5.0.1.a(lapack-aux.o) > ld: symbol(s) not found > collect2: ld returned 1 exit status I attempted to install hmatrix with the "-faccelerate" option, but when using "ghc --make" for the above test code, I received the same error messages noted previously. Is there a way to tell if the "- faccelerate" was acknowledged and that the alternate library was used? One more clue: I took a look at the directions found on the page at mit.edu/harold... it turns out I had installed atlas/lapack unnecessarily. That explains the mysterious "not a valid archive member" message. Nevertheless, I am still befuddled by the "Undefined symbols" above. ghc --make is still unable to figure out where the liblapack.dylib file is in spite of ghci's success. Any suggestions from here? Regards, Duane Johnson P.S. I'm CC'ing the Haskell Cafe so that our journey so far can be archived. On Apr 6, 2009, at 12:22 PM, Alberto Ruiz wrote: > Hi Duane, > > I have seen your messages to Haskell Cafe but I am still thinking > about the problem... :) > > Can you run simple matrix operations in ghci? > > $ ghci > Prelude> import Numeric.LinearAlgebra > Prelude Numeric.LinearAlgebra> let m = (2><2) [1..4 :: Double] > > (...Loading packages...) > > Prelude Numeric.LinearAlgebra> m <> m > (2><2) > [ 7.0, 10.0 > , 15.0, 22.0 ] > > If so, some version of blas/lapack can be found in your system, it > is strange that ghc --make doesn't find them. > > Perhaps the problem is that dynamic libraries like liblapack.so are > required instead of static ones like liblapack.a. (In ubuntu they > are in the "devel" packages for blas/lapack.) > > I am not familiar with Mac OS, but if you can use the "accelerate > framework" in your system you may try the -faccelerate configuration > option for hmatrix: > > cabal install hmatrix -faccelerate > > See also the following page (steps 3-8). It explains how to install > hmatrix on Mac OS (required for other project). > > http://mit.edu/harold/Public/easyVisionNotes.html > > Please let me know if any of these methods works for you. > > Thanks for your message, > > Alberto > > > > Duane Johnson wrote: >> Hi Alberto, >> I've been very happy with hmatrix as I've used it in ghci, and I >> should first thank you for making such an excellent package. I've >> had trouble when linking it using "ghc --make" on Mac OS >> (Leopard). Below are two messages I sent to the Haskell Cafe >> mailing list. Do you have any insight into either question: >> 1. How to link without atlas/lapack >> 2. What the "not a valid archive member" message means? >> Thank you! >> Duane Johnson >> Brigham Young University >> Provo, UT >> Begin forwarded message: >>> From: Don Stewart <dons(a)galois.com> >>> Date: April 5, 2009 11:48:38 PM MDT >>> To: Duane Johnson <duane.johnson(a)gmail.com> >>> Subject: Re: [Haskell-cafe] Re: Linking hmatrix without LAPACK >>> >>> It would be best to contact the author of hmatrix directly. >>> >>> >>> duane.johnson: >>>> On a related note, I've installed Atlas, and I get the following >>>> error >>>> when linking: >>>> >>>>> Linking SilkwormGame ... >>>>> ld: in /opt/local/lib/liblapack.a(), not a valid archive member >>>>> collect2: ld returned 1 exit status >>>> >>>> How would I go about diagnosing this? I've never seen an ld >>>> error like >>>> that. >>>> >>>> Thanks again! >>>> Duane Johnson >>>> >>>> >>>> On Apr 5, 2009, at 11:02 PM, Duane Johnson wrote: >>>> >>>>> I'm curious if there is a quick fix to this. I installed GLS and >>>>> hmatrix, and it runs wonderfully together in ghci. When I run >>>>> ghc -- >>>>> make, however, I run into the following link dependency: >>>>> >>>>> Linking SilkwormGame ... >>>>> Undefined symbols: >>>>> "_dgemm_", referenced from: >>>>> _multiplyR in libHShmatrix-0.5.0.1.a(lapack-aux.o) >>>>> "_dgesv_", referenced from: >>>>> _linearSolveR_l in libHShmatrix-0.5.0.1.a(lapack-aux.o) >>>>> ... etc >>>>> >>>>> Is there a way to tell ghc to not link these? Or am I making a >>>>> poor >>>>> assumption that if my code runs in ghci, it does not need LAPACK? >>>>> >>>>> Thanks, >>>>> Duane Johnson >>>> >>>> _______________________________________________ >>>> Haskell-Cafe mailing list >>>> Haskell-Cafe(a)haskell.org >>>> http://www.haskell.org/mailman/listinfo/haskell-cafe

1 1

Re: [Haskell-cafe] Combining sequences
by michael rice 06 Apr '09

06 Apr '09

Thanks. It looks like mergeBy will do the job, but is it available in Hugs? Michael --- On Sun, 4/5/09, Henning Thielemann <lemming(a)henning-thielemann.de> wrote: From: Henning Thielemann <lemming(a)henning-thielemann.de> Subject: Re: [Haskell-cafe] Combining sequences To: "michael rice" <nowgate(a)yahoo.com> Cc: haskell-cafe(a)haskell.org Date: Sunday, April 5, 2009, 9:09 PM On Sat, 4 Apr 2009, michael rice wrote: > Is there a simple way to combine two sequences that are in ascending order into a single > sequence that's also in ascending order? An example would be the squares [1,4,9,16,25..] > combined with the cubes [1,8,27,64,125..] to form [1,1,4,8,9,16,25,27..]. http://hackage.haskell.org/packages/archive/utility-ht/0.0.4/doc/html/Data-…

3 2

ghc --make unable to find dynamic library, but ghci can
by Duane Johnson 06 Apr '09

06 Apr '09

Hi Haskellers, This is related to my previous message, "Linking hmatrix without LAPACK". Apparently, ghc --make is not finding the lapack.dylib library where ghci is (dylib is Mac OS X specific) . For example, the following test module does NOT work when compiled with ghc --make: > module Main where > import Numeric.LinearAlgebra.Tests > > main = do > runTests 20 But the following runs fine in ghci: > $ ghci > GHCi, version 6.10.1: http://www.haskell.org/ghc/ :? for help > [...loading packages...] > Prelude> :m Numeric.LinearAlgebra.Tests > Prelude Numeric.LinearAlgebra.Tests> runTests 20 > [...loading packages...] > ------ mult > OK, passed 100 tests. > OK, passed 100 tests. > [...more tests pass...] Can anyone point me in the right direction? Thank you, Duane Johnson

1 0

Re: [Haskell-cafe] Combining sequences
by nowgate＠yahoo.com 06 Apr '09

06 Apr '09

Hi Daniel, Thanks, but apparently no go. This isn't critical, as I already have a function that will combine two sequences. Michael ============= Michael [michael@localhost untitled folder]$ cd utility-ht-0.0.4 [michael@localhost utility-ht-0.0.4]$ ls LICENSE Setup.lhs src utility-ht.cabal [michael@localhost utility-ht-0.0.4]$ ./Setup.lhs configure --hugs /usr/bin/env: runhaskell: No such file or directory --OOPS! [michael@localhost utility-ht-0.0.4]$ su Password: [root@localhost utility-ht-0.0.4]# ./Setup.lhs configure --hugs /usr/bin/env: runhaskell: No such file or directory [root@localhost utility-ht-0.0.4]# --- On Mon, 4/6/09, Daniel Fischer <daniel.is.fischer(a)web.de> wrote: From: Daniel Fischer <daniel.is.fischer(a)web.de> Subject: Re: [Haskell-cafe] Combining sequences To: haskell-cafe(a)haskell.org Cc: "michael rice" <nowgate(a)yahoo.com> Date: Monday, April 6, 2009, 12:04 PM Am Montag 06 April 2009 17:12:42 schrieb michael rice: > I downloaded it and it appears more complicated than just adding files to a > directory. There's a setup and a build, and no assurances it will work with > Hugs. > > I think I'll wait for more information. > > Michael > Try installing it with Cabal: ./Setup.lhs configure --hugs if that doesn't say otherwise, chances are that it will work, so try ./Setup.lhs build sudo ./Setup.lhs install If it doesn't work, you can copy the code from Data.List.HT

2 1

community.haskell.org unreachable?
by Claus Reinke 06 Apr '09

06 Apr '09

I seem to be having problems reaching anything on that server. Does anyone know what is going on, or who to contact? It would help if the haskellwiki page http://www.haskell.org/haskellwiki/Haskell.org_domain would mention the admin address directly, instead of referring to http://community.haskell.org/admin/ which is also unreachable. Claus

2 2

Re: [Haskell-cafe] ANN: SVGFonts 0.1
by Tillmann Vogt 06 Apr '09

06 Apr '09

John Van Enk schrieb: > This sounds very cool. Is is just a program, or is there a library sitting > behind it? From your .cabal file, it seems to be just a binary program. > > Is this correct? > > http://hackage.haskell.org/packages/archive/SVGFonts/0.1/SVGFonts.cabal > > On Mon, Apr 6, 2009 at 1:22 PM, Tillmann Vogt > <Tillmann.Vogt(a)rwth-aachen.de>wrote: > It is a real library made of pure Haskell. What is wrong with my .cabal file?

3 2

Making videos of your project
by Don Stewart 06 Apr '09

06 Apr '09

Hey guys, I've been making quick youtube videos of projects to convey what they do. Here, for example, using Tim Docker's Charts library in ghci: http://www.youtube.com/watch?v=2Lqzygxvus0 (Click on the HD button for higher res). Or one of Neil Brown's "SG" OpenGL graphics library, http://www.youtube.com/watch?v=tJ6AtfcorkY You can create your own really simply: 1. install 'recordmydesktop' I use: recordmydesktop --no-sound --v_bitrate 2000000 2. type 'recordmydesktop' 3. do something with haskell 4. hit control-C 5. upload out.ogv to youtube If you're a library author of one of the 2 or 3D packages, please consider video along with other "why I want to use this" material. -- Don

5 7