Gambit-list Mars 2008

gambit-list@iro.umontreal.ca

34 participants
49 discussions

Gambit Dumping Grounds
by Marc Feeley 19 Mar '08

19 Mar '08

Have you ever wished to have a place to put your Gambit code so that others could easily access it? Wait no longer and go to: http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Dumping_Grounds Who will be the first to submit a package? Don't be shy... its the dumping grounds! Marc

3 3

Google Summer of Code
by Marc Feeley 18 Mar '08

18 Mar '08

Hello Gambit and Snow users. I will be applying to the Google Summer of Code program as a mentoring organization and propose projects for advancing the development of Gambit, Snow, and Termite. I'd like to start a collective brainstorming exercice to come up with a list of specific projects. If you are interested in participating as a student, please respond to this message (preferably on the mailing list). Please describe briefly what you would like to work on. If you cannot participate (e.g. you are not a student) but have project suggestions, then please speak up on the mailing list. Some projects ideas that come to mind: - native thread support - real-time/parallel GC - closer integration of Termite and Gambit - Gambit packages - web framework - documentation - François Pinard's projects (see MSLUG mailing-list archive) Marc

11 22

Re: [gambit-list] Gambit Dumping Grounds
by David St-Hilaire 18 Mar '08

18 Mar '08

Marc Feeley wrote: > Have you ever wished to have a place to put your Gambit code so that > others could easily access it? Wait no longer and go to: > > http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Dumping_Grounds > > Who will be the first to submit a package? Don't be shy... its the > dumping grounds! Wow this seems great as it is not as formal as snow and thus I feel better at putting code there even if its not really good ^_-Y. The thing is, how can I create a page in the wiki? I'd like to put my code on a page so that it can be browsed directly on the web, instead of having to download it, which I think is inconvenient when you just when to peek to the content of the code... I registered myself to the wiki, so now I can edit pages, but I don't understand how to create a new one, and how to link it etc... Thanks! David

2 1

Re: [gambit-list] As far as the renaming scheme goes, ...
by Ken Dickey 18 Mar '08

18 Mar '08

> Dimitris Vyzovitis wrote: ... > One of the problems I have with these systems (including the modules > produced by the orignal portable syntax-case) is that they produce mutable > bindings for module/library exported identifiers. Note that R6RS library bindings are immutable. > Ideally, the module system shouldn't expand to core scheme, but rather to > gambit's core forms. Sounds like the start of a master's thesis to me! ;^) -KenD

3 3

As far as the renaming scheme goes, ...
by Ken Dickey 18 Mar '08

18 Mar '08

You probably know of the two major syntax system implementations for R6RS, both of which deal with renaming, but just in case... http://www.cs.indiana.edu/~aghuloum/r6rs-libraries/index.html http://www.het.brown.edu/people/andre/macros/ Cheers, -KenD

3 2

Re: [gambit-list] As far as the renaming scheme goes, ...
by Ken Dickey 18 Mar '08

18 Mar '08

> Arthur Smyles writes: ... > Ghuloum's library is written in R6 scheme. It works fine out of the box, > but I had some difficulty in modifying it to export some of Gambit's > extensions. You seem to have had an impact. I noticed that Ghuloum's library has a description and example of how to import implementation specific features using Gambit as an illustration. BTW, one motivation for mentioning R6RS macros is that there is a nice system for "breaking hygiene", including creation of gensym'ed temporaries. E.g. [from the r6rs-libraries doc]: (define-syntax include (lambda (x) (define read-file (lambda (fn k) (let ([p (open-file-input-port fn)]) (let f ([x (get-datum p)]) (if (eof-object? x) (begin (close-port p) ’()) (cons (datum->syntax k x) (f (get-datum p)))))))) (syntax-case x () [(k filename) (let ([fn (syntax->datum #’filename)]) (with-syntax ([(exp ...) (read-file fn #’k)]) #’(begin exp ...)))]))) (define-syntax letrec (lambda (x) (syntax-case x () (( ((i e) ...) b1 b2 ...) (with-syntax (((t ...) (generate-temporaries #’(i ...)))) #’(let ((i <undefined>) ...) (let ((t e) ...) (set! i t) ... (let () b1 b2 ...)))))))) Also, it would seem natural to use a "gensym-prefix" which happened to match the Gambit namespace prefix of a particular module. Just a thought.. FYI, -KenD

1 0

Re: [gambit-list] As far as the renaming scheme goes, ...
by Abdulaziz Ghuloum 18 Mar '08

18 Mar '08

Greetings all, Arthur Smyles wrote: > Ghuloum's library is written in R6 scheme. It works fine out of the box, > but I had some difficulty in modifying it to export some of Gambit's > extensions. I would be happy to try to resolve any issues or add any extensions that may be required for easy integration with gambit if the gambit developers are interested. The published version of the library system does indeed work with gambit (along with some 10 other implementations that I used for testing it), but it does not provide any of the extensions that these implementations provide. It's also quite old. The current version used in ikarus provides more functionality (e.g., separate compilation), more robust error reporting, and is substantially faster; but it needs to be cleaned up before publishing. Anyways, if you guys are interested, let me know. Aziz,,,

1 0

Re: [gambit-list] As far as the renaming scheme goes, ...
by Arthur Smyles 18 Mar '08

18 Mar '08

I have some experience using both those libraries. Ghuloum's library is written in R6 scheme. It works fine out of the box, but I had some difficulty in modifying it to export some of Gambit's extensions. As for Andre's, his will not work out of the box with Gambit. I worked with him on creating a compat-gambit.scm so that it will work with Gambit. I've put it all up as a tarball at http://smyles.com/gambit-r6rs.tgz if you want to give it a go. I have a bit of documentation on how it works if you search for "R6RS" on Gambit's wiki. I think you'll find Andre's design very interesting for your project since it's written in R5 and is built out of a simpler core. His website has more details and you should check out his comments on comp.lang.scheme. As far as the state of R6 on Gambit, it works great but the system is still rough. I've not only exposed Gambit's extensions as libraries, but I'm also able to create my own libraries, including libraries that use Gambit's ffi. There still plenty to do so if any of you are interested in hacking on it let me know. I plan on making an update to the tarball in a couple of days. Arthur Ken Dickey wrote: > You probably know of the two major syntax system implementations for R6RS, both of which deal with renaming, but just in case... > > http://www.cs.indiana.edu/~aghuloum/r6rs-libraries/index.html > > http://www.het.brown.edu/people/andre/macros/ > > Cheers, > -KenD > _______________________________________________ > Gambit-list mailing list > Gambit-list(a)iro.umontreal.ca > https://webmail.iro.umontreal.ca/mailman/listinfo/gambit-list >

1 0

Re: [gambit-list] [Snow-users-list] Google Summer of Code
by Marc Feeley 17 Mar '08

17 Mar '08

On 15-Mar-08, at 12:45 PM, Matthew Martin wrote: > What about getting SWIG ( http://www.swig.org/ ) working with Gambit? > It already supports Chicken, Guile, and MzScheme. Thanks for the suggestion. I have added it to the GSoC ideas list (http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/GSoC_ideas_list ). A few other ideas were suggested to the Snow and Gambit lists. Could the authors please go to the ideas list page and add those suggestions in the second section? Marc

2 1

Compiling with C libraries?
by David St-Hilaire 17 Mar '08

17 Mar '08

Hello! I'm trying to compile a simple file which uses a bit of math and list functions. As far as I can remember, I never used other libraries than -lgambit when compiling the generated .c files, but now, it seems that I need to add also -lm to include the C math library... If I don't I get something like: gcc -I/opt/gambit-c/current/include -o question3 scm-lib.c Question3.c Question3_.c -lgambc -lutil -L/opt/gambit-c/current/lib /tmp/ccitDGGo.o: In function `___H_standard_2d_deviation': scm-lib.c:(.text+0xcfa4): undefined reference to `sqrt' /tmp/cc7ItBpa.o: In function `___H_standard_2d_deviation': Question3.c:(.text+0xd1c3): undefined reference to `sqrt' /opt/gambit-c/current/lib/libgambc.a(setup.o): In function `___setup': setup.c:(.text+0x199d): undefined reference to `fabs' setup.c:(.text+0x19bd): undefined reference to `floor' setup.c:(.text+0x19e7): undefined reference to `ceil' setup.c:(.text+0x1a11): undefined reference to `exp' ... os_dyn.c:(.text+0x80): undefined reference to `dlclose' /opt/gambit-c/current/lib/libgambc.a(os_dyn.o): In function `___dynamic_load': os_dyn.c:(.text+0x296): undefined reference to `dlopen' os_dyn.c:(.text+0x2ad): undefined reference to `dlsym' os_dyn.c:(.text+0x2c6): undefined reference to `dlerror' os_dyn.c:(.text+0x2f8): undefined reference to `dlclose' ... /opt/gambit-c/current/lib/libgambc.a(_num.o): In function `___H__20___num': _num.c:(.text+0x1d7bb): undefined reference to `exp' _num.c:(.text+0x1d820): undefined reference to `exp' _num.c:(.text+0x1d9c2): undefined reference to `exp' _num.c:(.text+0x1de92): undefined reference to `log' _num.c:(.text+0x1e0fb): undefined reference to `log' _num.c:(.text+0x1e2bd): undefined reference to `log' _num.c:(.text+0x1e4af): undefined reference to `sin' ... collect2: ld returned 1 exit status make: *** [question3] Error 1 As you can see, there is also some other missing library (using dlopen, etc...) which I don't know of... If I add -lm on my compilation line, then I remove all the math related errors, but I still get those related to dlopen, etc... What's going on? Is this normal? I'm pretty sure that I never had to compile with -lm before. I also compile with -lutil because Marc told me to, but I'm not sure I understand why either... Thanks! ^_^ David

2 1

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Gambit-list Mars 2008