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Object duplication
by David St-Hilaire 30 Avr '08

30 Avr '08

Hi all! Is there a gambit function that can duplicate an arbitrary scheme object available or do I have to write my own for each of my data structures? Thanks! David

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Linker problems
by Burkhard Neppert 30 Avr '08

30 Avr '08

Hello, I've trouble installing gambit 4.2.6 on Win XP with cygwin with gcc 4.2.2 I did ./configure --enable-cplusplus CXX=g++; make Linking of gsi then gives many undefined references: g++ _gsi.o _gsi_.o libgambcgsi.a ../lib/libgambc.a -o gsi.exe _gsi.o:_gsi.c:(.text+0x1d): undefined reference to `____G_main' _gsi.o:_gsi.c:(.text+0x22): undefined reference to `____G_main' _gsi.o:_gsi.c:(.text+0x43): undefined reference to `____S__23__23_type_2d_17_2d_2babe060_2d_9af6_2d_456f_2d_a26e_2d_40b592f690ec' _gsi.o:_gsi.c:(.text+0x4d): undefined reference to `____S__23__23_type_2d_33_2d_bebee95d_2d_0da2_2d_401d_2d_a33a_2d_c1afc75b9e43' _gsi.o:_gsi.c:(.text+0x57): undefined reference to `____S__23__23_type_2d_35_2d_85099702_2d_35ec_2d_4cb8_2d_ae55_2d_13c4b9b05d10' _gsi.o:_gsi.c:(.text+0x61): undefined reference to `____S__23__23_type_2d_5' _gsi.o:_gsi.c:(.text+0x6b): undefined reference to `____S_angle_2d_keyword' _gsi.o:_gsi.c:(.text+0x75): undefined reference to `____S_brace_2d_keyword' _gsi.o:_gsi.c:(.text+0x7f): undefined reference to `____S_bracket_2d_keyword' _gsi.o:_gsi.c:(.text+0x89): undefined reference to `____S_case_2d_conversion_3f_' _gsi.o:_gsi.c:(.text+0x93): undefined reference to `____S_char_2d_delimiter_3f__2d_table' ... Anyone any idea what I'm doing wrong? Thanks Burkhard

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Using mercurial to update Gambit
by James Long 29 Avr '08

29 Avr '08

I'm trying to get on the track of updating Gambit with mercurial. Unfortunately I can't get it to work. Here's the most "official" documentation I could find: http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Contributing_Patches_… I followed those steps and during the `make update` command, I get the following error: james% make update hg pull pulling from http://www.iro.umontreal.ca/~gambit/repo/gambit/ searching for changes no changes found make update-nopull next_version=`hg tags | sed -n -e '/v4.2.6 /{g;1!p;};h' | sed -e 's/\ ([^ ]*\)-bootstrap.*/\1/'`; \ next_version=`hg tags | sed -n -e '/v4.2.6 /{g;1!p;};h' | grep -e 'v.*-bootstrap' | sed -e 's/$[^ ]*$-bootstrap.*/\1/'`; \ if test "$next_version" = ""; then \ hg update; \ else \ hg update -r $next_version-bootstrap; \ make bootstrap; \ hg update -r $next_version; \ make clean bootstrap update; \ fi 0 files updated, 0 files merged, 0 files removed, 0 files unresolved make making all in include making all in lib gcc -I../include -I. -no-cpp-precomp -Wall -W -Wno-unused -O1 -fno- math-errno -fschedule-insns2 -fno-trapping-math -fno-strict-aliasing - fwrapv -fmodulo-sched -freschedule-modulo-scheduled-loops -fomit-frame- pointer -fPIC -fno-common -mieee-fp -DHAVE_CONFIG_H -D___PRIMAL - D___LIBRARY -D___GAMBCDIR="\"/usr/local/Gambit-C/v4.2.6\"" - D___SYS_TYPE_CPU="\"i386\"" -D___SYS_TYPE_VENDOR="\"apple\"" - D___SYS_TYPE_OS="\"darwin9.2.2\"" -c _io.c In file included from ../include/gambit.h:12, from _io.c:1248: ../include/gambit-not402006.h:1:2: error: #error "The version indicated in ___VERSION is not supported by gambit.h" ../include/gambit-not402006.h:2:2: error: #error "You are probably compiling C code generated by a Gambit compiler earlier or later than v4.2.6" ../include/gambit-not402006.h:3:2: error: #error "___VERSION will be set to 402006 to reduce other errors" make[2]: *** [_io.o] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [update] Error 2 Thanks - james

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Listing of wiki pages
by David St-Hilaire 29 Avr '08

29 Avr '08

Hello! I think that someone asked not long ago (last week?) how to list all the pages in the wiki... I don't think that this question was answered and I was also interested in knowing the answer because I could be very usefull and the search does not seem to be really efficient. Sorry for the bumping ;) David

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Access to Gambit version inside Gambit
by François Magnan 29 Avr '08

29 Avr '08

Hi, Here is a simple one... Is there a clean way to access the gambit version number from gsi and compiled code? Thank you, Francois Magnan

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(read-char port) eof question
by Francisco 27 Avr '08

27 Avr '08

According to r5rs the read-char procedure returns the eof object. I asume that eof-object? returns true when called with the eof object returned by the read-char procedure. I have run this tests with string ports and network ports But when I run my program I eventually get the following error: *** ERROR IN ##thread-deadlock-action! -- Deadlock detected It never finds the eof object, is gambit returning the eof object? (I am using v4.2.4) How should I test if a port has reached the end? Thanks, Francisco

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Multi-thread debugging
by David St-Hilaire 26 Avr '08

26 Avr '08

Hello! I have an application that uses 2 threads where my second thread silently dies, without having any errors reported or debugger kicking in. What is the simplest way to have a debug repl pop up when I thread dies? I've read on the mailing list that it was possible to have a new xterm window pop up (https://webmail.iro.umontreal.ca/pipermail/gambit-list/2007-August/001671.h…) but is it possible to simply have the debugger pop up in the current repl? Thanks! David

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Interested in portable syntax-case & gambit
by James Long 26 Avr '08

26 Avr '08

As a followup to the Module System project that Christian Jaeger and I have discussed, as described here (http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Module_System ), this message goes to the Gambit list. However, the intention of this message is to ask Marc about Gambit's expansion mechanism. The project still loosely exists, though it is very much in phase 1, where Christian and I are independently developing different protoypes. After doing a lot of research, I became very interested in the portable syntax-case implementation that Gambit currently adopts. It is quite powerful and should fulfill my needs. My current goal then is to work on better integration of Gambit and syntax-case. If I can fix most of the current problems (location information, etc.), and build a lightweight configuration language on top of it, that would go very far. It's very hard to start digging through Gambit's expansion/compiling mechanism though. Are there any wiki pages that would describe anything about Gambit's source code transforming mechanisms? (side note: Is there a way to see all of the pages on the wiki?) If not, I was wondering if Marc, or anyone else who has had experience with all of this, would be interested in working with me on this, at least just to help get it going. Maybe Christian has had experience in this area? Marc has stated his interested in this, as in the following email: https://webmail.iro.umontreal.ca/pipermail/gambit-list/2005-December/000512… I'm curious about the "few bits and pieces" mentioned in that email. I started by looking at the portable syntax-case's SC-EXPAND procedure, and looking at how it was hooked in to gambit. What I found was the ##EXPAND-SOURCE procedure, but I was quickly stuck at what to do with it. > (set! ##expand-source (lambda (x) (pp x) x)) > (define foo 5) #(#(source1) (#(#(source1) define (console) 65537) #(#(source1) foo (console) 524289) #(#(source1) 5 (console) 786433)) (console) 1) I've started digging through Gambit's internals to figure out what type of record this is, but it's going very slowly. Thanks, - James

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read-line
by jadamson＠partners.org 25 Avr '08

25 Avr '08

Hello, Perhaps my previous message was too verbose, or there is someone still trying it out. After working on it some more, my question boils down to this: How the heck do I use read-line in a program? Take the following REPL session as an example: Gambit v4.2.6 > (read) "This is an s-expression" ;<=typed "This is an s-expression" ;<=echoed > (read-line) "" > (read-line)This is an s-expression "This is an s-expression" > So, I know that I can call read-line from call-with-input-file, or call-with-input-string, but if I have an input file or a string, then I already have what I want. What I want is for the user to input a line of text, and for the program to do something with that line of text (as a string). However I use (read-line), it always accepts the text that was already there (usually "" or "\t"). How do I get it (or some other procedure) to accept user input? What would I put into (call-with-input-string ... read-line)? I've tried a few things, and I always just end up redefining read-line: > (define (read-this) (let ((input (read-char)) (output "")) (if (char=? input #\newline) output (string-append (string input) (read-this))))) > (read-this) "" > (read-this)this is text, baby "this is text, baby" I'm really not getting this; can someone please explain it to me? Thanks, Joel -- Joel J. Adamson Biostatistician Pediatric Psychopharmacology Research Unit Massachusetts General Hospital Boston, MA 02114 (617) 643-1432 (303) 880-3109 Public key: http://pgp.mit.edu http://www.unc.edu/~adamsonj The information transmitted in this electronic communication is intended only for the person or entity to whom it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this information in error, please contact the Compliance HelpLine at 800-856-1983 and properly dispose of this information.

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Bashing in scheme?
by David St-Hilaire 24 Avr '08

24 Avr '08

Hello all! I'd like a little help with some bash style scripting that I would like to do in my gambit repl. How can I do in scheme what I would do in bash like f1 < input-file | f2, where f1 and f2 are 2 scheme functions reading and writing to stdin and stdout respectively. I know that the < input-file part is done with (with-input-from-file input-file (lambda () f1) put it is the pipe part that remains obscur to me... Thanks! David

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