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How can built a small as 5 Kbytes "Hello World" program ?
by Ryuho Yokoyama 20 Jan '15

20 Jan '15

I built a "Hello World" program as follows, >type h.scm (display "Hello ") >type w.scm (display "World") >gsc -link h w >gsc -obj h.c w.c w_.c >gcc -o w.exe h.o w.o w_.o C:/Gambit-C_64bit/v4.7.3/lib/libgambc.a -lws2_32 >w.exe Hello World > This way, the size of the "w.exe" is 4.61MB. In Gambit-C manual documents 3. The Gambit Scheme compiler 3.4 Link files ... A "Hello World" program built this way can be as small as 5 Kbytes. ... Could you please teach me how to built program as small as 5 Kbytes one. Thanks in advance.

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Building Gambit on OS X
by Marc Feeley 16 Jan '15

16 Jan '15

Xcode 6.1.1 was released a little over a month ago, so I decided to do some benchmarking to see how well its C compilers (Apple clang 6.0 and Apple gcc 6.0) compare against GNU gcc 4.9.2 when compiling Gambit. I configured and built Gambit with ./configure --enable-single-host CC="<C_COMPILER>" make -j8 I report the build time for each compiler and the execution time of test 4 (which measures the speed of the interpreter, which is indicative of the relative speed of the code generated by Gambit). Here are the numbers: Build test4 C compiler (secs) (secs) 60.31 1.30 GNU gcc 4.9.2 2042.98 (34x) 3.05 (2.3x) Apple clang 6.0 1875.56 (31x) 3.08 (2.4x) Apple gcc 6.0 As can be seen, the Apple C compilers build Gambit in roughly 30 minutes, which is about 30x slower than when using GNU gcc 4.9.2 . The execution time is also better for GNU gcc, about 2.3x faster. So on OS X it is clearly advantageous to install GNU gcc when using Gambit. This can easily be achieved with the homebrew system with the command brew install gcc49 Marc P.S. here is the version information of the compilers: ============================================================================== GNU gcc 4.9.2: % /usr/local/Cellar/gcc49/4.9.2/bin/gcc-4.9 -v Using built-in specs. COLLECT_GCC=/usr/local/Cellar/gcc49/4.9.2/bin/gcc-4.9 COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc49/4.9.2/libexec/gcc/x86_64-apple-darwin14.0.0/4.9.2/lto-wrapper Target: x86_64-apple-darwin14.0.0 Configured with: ../configure --build=x86_64-apple-darwin14.0.0 --prefix=/usr/local/Cellar/gcc49/4.9.2 --enable-languages=c,c++,objc,obj-c++ --program-suffix=-4.9 --with-gmp=/usr/local/opt/gmp4 --with-mpfr=/usr/local/opt/mpfr2 --with-mpc=/usr/local/opt/libmpc08 --with-cloog=/usr/local/opt/cloog018 --with-isl=/usr/local/opt/isl011 --with-system-zlib --enable-version-specific-runtime-libs --enable-libstdcxx-time=yes --enable-stage1-checking --enable-checking=release --enable-lto --disable-werror --with-pkgversion='Homebrew gcc49 4.9.2' --with-bugurl=https://github.com/Homebrew/homebrew-versions/issues --enable-plugin --disable-nls --enable-multilib Thread model: posix gcc version 4.9.2 (Homebrew gcc49 4.9.2) ============================================================================== Apple clang 6.0: % /usr/bin/clang -v Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn) Target: x86_64-apple-darwin14.0.0 Thread model: posix ============================================================================== Apple gcc 6.0: % /usr/bin/gcc -v Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1 Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn) Target: x86_64-apple-darwin14.0.0 Thread model: posix ==============================================================================

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Mathematics of Program Construction (MPC 2015): final call for papers
by José Pedro Magalhães 15 Jan '15

15 Jan '15

Apologies for multiple copies. FINAL CALL FOR PAPERS 12th International Conference on Mathematics of Program Construction, MPC 2015 Königswinter, Germany, 29 June - 1 July 2015 http://www.cs.ox.ac.uk/conferences/MPC2015/ BACKGROUND The MPC conferences aim to promote the development of mathematical principles and techniques that are demonstrably practical and effective in the process of constructing computer programs, broadly interpreted. The 2015 MPC conference will be held in Königswinter, Germany, from 29th June to 1st July 2015. The previous conferences were held in Twente, The Netherlands (1989), Oxford, UK (1992), Kloster Irsee, Germany (1995), Marstrand, Sweden (1998), Ponte de Lima, Portugal (2000), Dagstuhl, Germany (2002), Stirling, UK (2004, colocated with AMAST), Kuressaare, Estonia (2006, colocated with AMAST), Marseille, France (2008), Québec City, Canada (2010, colocated with AMAST), and Madrid, Spain (2012). TOPICS Papers are solicited on mathematical methods and tools put to use in program construction. Topics of interest range from algorithmics to support for program construction in programming languages and systems. The notion of "program" is broad, from algorithms to hardware. Some typical areas are type systems, program analysis and transformation, programming-language semantics, security, and program logics. Theoretical contributions are welcome, provided that their relevance to program construction is clear. Reports on applications are welcome, provided that their mathematical basis is evident. We also encourage the submission of "pearls": elegant, instructive, and fun essays on the mathematics of program construction. IMPORTANT DATES * Submission of abstracts: 26 January 2015 * Submission of full papers: 2 February 2015 * Notification to authors: 16 March 2015 * Final version: 13 April 2015 SUBMISSION Submission is in two stages. Abstracts (plain text, 10 to 20 lines) must be submitted by 26 January 2015. Full papers (pdf) adhering to the LaTeX llncs style must be submitted by 2 February 2015. There is no official page limit, but authors should strive for brevity. The web-based system EasyChair will be used for submission (https://easychair.org/conferences/?conf=mpc2015) Papers must report previously unpublished work, and must not be submitted concurrently to a journal or to another conference with refereed proceedings. Accepted papers must be presented at the conference by one of the authors. Please feel free to write to mpc2015(a)easychair.org with any questions about academic matters. The proceedings of MPC 2015 will be published in Springer-Verlag's Lecture Notes in Computer Science series, as have all the previous editions. Authors of accepted papers will be expected to transfer copyright to Springer for this purpose. After the conference, authors of the best papers will be invited to submit revised versions to a special issue of the Elsevier journal Science of Computer Programming. PROGRAMME COMMITTEE Ralf Hinze University of Oxford, UK (chair) Eerke Boiten University of Kent, UK Jules Desharnais Université Laval, Canada Lindsay Groves Victoria University of Wellington, New Zealand Zhenjiang Hu National Institute of Informatics, Japan Graham Hutton University of Nottingham, UK Johan Jeuring Utrecht University and Open University, The Netherlands Jay McCarthy Vassar College, US Larissa Meinicke The University of Queensland, Australia Bernhard Möller Universität Augsburg, Germany Shin-Cheng Mu Academia Sinica, Taiwan Dave Naumann Stevens Institute of Technology, US Pablo Nogueira Universidad Politécnica de Madrid, Spain Ulf Norell University of Gothenburg, Sweden Bruno C. d. S. Oliveira The University of Hong Kong, Hong Kong José Nuno Oliveira Universidade do Minho, Portugal Alberto Pardo Universidad de la República, Uruguay Christine Paulin-Mohring INRIA-Université Paris-Sud, France Tom Schrijvers KU Leuven, Belgium Emil Sekerinski McMaster University, Canada Tim Sheard Portland State University, US Anya Tafliovich University of Toronto Scarborough, Canada Tarmo Uustalu Institute of Cybernetics, Estonia Janis Voigtländer Universität Bonn, Germany VENUE The conference will take place in Königswinter, Maritim Hotel, where accommodation has been reserved. Königswinter is situated on the right bank of the river Rhine, opposite Germany's former capital Bonn, at the foot of the Siebengebirge. LOCAL ORGANIZERS Ralf Hinze University of Oxford, UK (co-chair) Janis Voigtländer Universität Bonn, Germany (co-chair) José Pedro Magalhães University of Oxford, UK Nicolas Wu University of Oxford, UK For queries about local matters, please write to jv(a)informatik.uni-bonn.de.

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shell-command question (v4.7.3)
by Ryuho Yokoyama 14 Jan '15

14 Jan '15

Hello, I am a very satisfied Gambit user. (prebuilt/gambc-v4_6_0-windows-mingw.exe) Now I wont to use latest version. (prebuilt/gambc-v4_7_3-windows-mingw32.exe) (prebuilt/gambc-v4_7_3-windows-mingw64.exe) But I can not use latest version of shell-command as below. ----- C:\Gambit-C_32bit\v4.6.0\bin>gsi Gambit v4.6.0 > (shell-command "echo hello > newfile1") 0 > --- C:\Gambit-C_32bit\v4.7.3\bin>gsi Gambit v4.7.3 > (shell-command "echo helo > newfile1") '"echo helo > newfile1' is not recognized as an internal or external command, operable program or batch file. 256 > --- C:\Gambit-C_64bit\v4.7.3\bin>gsi Gambit v4.7.3 > (shell-command "echo helo > newfile1") '"echo helo > newfile1' is not recognized as an internal or external command, operable program or batch file. 256 > ----- Is there any way to solve this? Thanks in advance.

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v4.7.3 ??
by Roy Pfund 13 Jan '15

13 Jan '15

https://github.com/feeley/gambit/releases says that the latest release is v4.7.0 while http://gambitscheme.org/wiki/index.php/Main_Page says that the latest release is v4.7.3, why is there a discrepancy?

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FFI C out parameters
by Jacob Horrocks 13 Jan '15

13 Jan '15

Hi Gambit. I'm new to C programming, and am struggling in thinking up a way to wrap c functions that have out parameters via pointers. My strongest desire would to be able to call a c-lambda like-so: (receive return-value-1 return-value-2 (my-c-lambda-wrapper-call some args) ....) But I am completely stumped. Thanks for any help/advice you can give.

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Results of subtraction don't match "The Scheme Programming Language"
by Steve Graham 30 Déc '14

30 Déc '14

On page16 of the above book, it show (- 1.5 1/2) returning 1.0. When I do such in Gambit, I get:Gambit v4.7.3 > (+ 1/2 1/2) 1 > (- 1.5 1/2) 1. Here are some other results:Chicken Scheme#;1> (- 1.5 1/2) Warning: cannot represent exact fraction - coerced to flonum: "1/2" 1. #;2> RacketC:\Users\Steve>racket Welcome to Racket v6.0.1. > (- 1.5 1/2) 1.0 > LarcenyLarceny v0.97 "Funny in the Head" (Aug 19 2009 14:35:39, precise:Win32:unified) > (- 1.5 1/2) 1.0 > MIT Scheme(- 1.5 1/2);Value: 1. Petite Chez Scheme> (- 1.5 1/2) 1.0 > SCM 5e7> (- 1.5 1/2) 1.0 > Why is there such a variety? Steve

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[TFP 2015] 1st call for papers
by Peter Achten 19 Déc '14

19 Déc '14

----------------------------- C A L L F O R P A P E R S ----------------------------- ======== TFP 2015 =========== 16th Symposium on Trends in Functional Programming June 3-5, 2015 Inria Sophia Antipolis, France http://tfp2015.inria.fr/ The symposium on Trends in Functional Programming (TFP) is an international forum for researchers with interests in all aspects of functional programming, taking a broad view of current and future trends in the area. It aspires to be a lively environment for presenting the latest research results, and other contributions (see below). Authors of draft papers will be invited to submit revised papers based on the feedback receive at the symposium. A post-symposium refereeing process will then select a subset of these articles for formal publication. The selected revised papers are expected to be published as a Springer Lecture Notes in Computer Science (LNCS) volume. TFP 2015 will be the main event of a pair of functional programming events. TFP 2015 will be accompanied by the International Workshop on Trends in Functional Programming in Education (TFPIE), which will take place on June 2nd. The TFP symposium is the heir of the successful series of Scottish Functional Programming Workshops. Previous TFP symposia were held in * Edinburgh (Scotland) in 2003; * Munich (Germany) in 2004; * Tallinn (Estonia) in 2005; * Nottingham (UK) in 2006; * New York (USA) in 2007; * Nijmegen (The Netherlands) in 2008; * Komarno (Slovakia) in 2009; * Oklahoma (USA) in 2010; * Madrid (Spain) in 2011; * St. Andrews (UK) in 2012; * Provo (Utah, USA) in 2013; * and in Soesterberg (The Netherlands) in 2014. For further general information about TFP please see the TFP homepage. (http://www.tifp.org/) == INVITED SPEAKERS == TFP is pleased to announce talks by the following two invited speakers: * Laurence Rideau is a researcher at INRIA and is interested in the semantics of programming languages , the formal methods, and the verification tools for programs and mathematical proofs. She participated in the beginnings of the Compcert project (certified compiler), and is part of the Component Mathematical team in the MSR-INRIA joint laboratory, who performed the formalization of the Feit-Thompson theorem successfully. Thirty years ago, computers barged in mathematics with the famous proof of the Four Color Theorem. Initially limited to simple calculation, their role is now expanding to the reasoning whose complexity is beyond the capabilities of most humans, as the proof of the classification of finite simple groups. We present our large collaborative adventure around the formalization of the Feit-Thompson theorem (http://en.wikipedia.org/wiki/Feit%E2%80%93Thompson_theorem) that is a first step to the classification of finite groups and that uses a palette of methods and techniques that range from formal logic to software (and mathematics) engineering. * Sam Aaron (?) == SCOPE == The symposium recognizes that new trends may arise through various routes. As part of the Symposium's focus on trends we therefore identify the following five article categories. High-quality articles are solicited in any of these categories: Research Articles: leading-edge, previously unpublished research work Position Articles: on what new trends should or should not be Project Articles: descriptions of recently started new projects Evaluation Articles: what lessons can be drawn from a finished project Overview Articles: summarizing work with respect to a trendy subject Articles must be original and not simultaneously submitted for publication to any other forum. They may consider any aspect of functional programming: theoretical, implementation-oriented, or experience-oriented. Applications of functional programming techniques to other languages are also within the scope of the symposium. Topics suitable for the symposium include: Functional programming and multicore/manycore computing Functional programming in the cloud High performance functional computing Extra-functional (behavioural) properties of functional programs Dependently typed functional programming Validation and verification of functional programs Debugging and profiling for functional languages Functional programming in different application areas: security, mobility, telecommunications applications, embedded systems, global computing, grids, etc. Interoperability with imperative programming languages Novel memory management techniques Program analysis and transformation techniques Empirical performance studies Abstract/virtual machines and compilers for functional languages (Embedded) domain specific languages New implementation strategies Any new emerging trend in the functional programming area If you are in doubt on whether your article is within the scope of TFP, please contact the TFP 2015 program chair, Manuel Serrano. == BEST PAPER AWARDS == To reward excellent contributions, TFP awards a prize for the best paper accepted for the formal proceedings. TFP traditionally pays special attention to research students, acknowledging that students are almost by definition part of new subject trends. A student paper is one for which the authors state that the paper is mainly the work of students, the students are listed as first authors, and a student would present the paper. A prize for the best student paper is awarded each year. In both cases, it is the PC of TFP that awards the prize. In case the best paper happens to be a student paper, that paper will then receive both prizes. == SPONSORS == TFP is financially supported by ?????????????????? == PAPER SUBMISSIONS == Acceptance of articles for presentation at the symposium is based on a lightweight peer review process of extended abstracts (4 to 10 pages in length) or full papers (20 pages). The submission must clearly indicate which category it belongs to: research, position, project, evaluation, or overview paper. It should also indicate which authors are research students, and whether the main author(s) are students. A draft paper for which ALL authors are students will receive additional feedback by one of the PC members shortly after the symposium has taken place. We use EasyChair for the refereeing process. Papers must be submitted at: https://easychair.org/conferences/?conf=tfp2015 Papers must be written in English, and written using the LNCS style. For more information about formatting please consult the Springer LNCS web site: http://www.springer.com/computer/lncs?SGWID=0-164-6-793341-0 == IMPORTANT DATES == Submission of draft papers: March 17, 2015 Notification: March 24, 2015 Registration: April 7, 2015 TFP Symposium: June 3-5, 2015 Student papers feedback: June 9, 2015 Submission for formal review: July 1, 2015 Notification of acceptance: September 8, 2015 Camera ready paper: October 8, 2015 == PROGRAM COMMITTEE == Janis Voigtländer University of Bonn, DE Scott Owens University of Kent, UK Neil Sculthorpe Swansea University, UK Colin Runciman University of York, UK Manuel Serrano Inria (PC chair), FR Rinus Plasmeijer University of Nijmegen, NL Tomas Petricek University of Cambridge, UK Marco T. Morazan Seton Hall University, USA Wolfgang De Meuter Vrije Universiteit Brussel, BE Michel Mauny Ensta ParisTech, FR Sam Lindley The University of Edinburgh, UK Daan Leijen Microsoft, USA Jurriaan Hage Utrecht University, NL Andy Gill University of Kansas, USA Thomas Gazagnaire University of Cambrige, UK Lars-Ake Fredlund Universidad Politécnica de Madrid, ES Jean-Christophe Filliatre Université Paris Sud Orsay, FR Marc Feeley Université de Montréal, CA Olaf Chitil University of Kent, UK Edwin Brady University of St Andrews, UK

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Gambit-REPL doesn't build for the simulator target
by Bradley Lucier 15 Déc '14

15 Déc '14

Marc: I followed your instructions for building Gambit-REPL after you made the recent changes in github. It failed for target simulator. I’ll include the last two-thousand lines of the log below. BTW, can I just plug my iPod Touch into the computer and test it on the device itself? Brad

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port setting arguments with syntax-case enabled
by Chris Vine 07 Déc '14

07 Déc '14

The following works fine without the syntax-rules/syntax-case macro expander enabled: (open-vector-pipe (list direction: 'input) (list direction: 'output)) However if the syntax-case expander is enabled, compilation generates a warning that 'direction:' is undefined and runtime fails with: *** ERROR -- (Argument 1) VECTOR or port settings expected (open-vector-pipe '(#!unbound input) '(#!unbound output)) This also works without the syntax-case expander: (open-vector-pipe (list 'direction: 'input) (list 'direction: 'output)) but fails with the syntax-case expander enabled with a different error: *** ERROR -- (Argument 1) VECTOR or port settings expected (open-vector-pipe '(|direction:| input) '(|direction:| output)) I am using gambit-c 4.7.3. Is there any workaround for this? Chris

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