243 lines
9.3 KiB
HTML
243 lines
9.3 KiB
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<body lang="en">
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<div class="section-level-extent" id="History">
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<div class="nav-panel">
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<p>
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Next: <a href="Credits.html" accesskey="n" rel="next">Credits</a>, Previous: <a href="What-is-ECL.html" accesskey="p" rel="prev">What is ECL</a>, Up: <a href="Introduction.html" accesskey="u" rel="up">Introduction</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indexes.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<h3 class="section" id="History-1">History</h3>
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<p>The ECL project is an implementation of the Common Lisp language
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inherits from many other previous projects, as shown in
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<a class="ref" href="History.html#fig_003ahierarchy">Figure 1</a>.
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</p>
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<div class="float" id="fig_003ahierarchy">
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<img class="image" src="figures/kcl-hierarchy.png" alt="figures/kcl-hierarchy">
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<div class="caption"><p><strong class="strong">Figure 1: </strong>ECL’s family tree</p></div></div>
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<p>The oldest ancestor is the Kyoto Common Lisp (KCL), an implementation
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developed in 1984 at the the Research Institute for Mathematical
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Sciences, Kyoto University [see <a class="pxref" href="Bibliography.html">Yasa:85</a>] by Taiichi Yuasa and
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Masami Hagiya. This implementation was developed partially in C and
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partially in Common Lisp itself and featured a lisp to C translator.
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</p>
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<p>Richard W. Weyhrauch in 1985 founded a company Ibuki to sell its
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version of KCL called Ibuki Common Lisp (IBCL) in the USA.
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</p>
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<p>Giuseppe Attardi learned about KCL from Richard Weyhrauch in 1986. At
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the time he was working with the company DELPHI. He extended KCL by
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adding a CLOS implementation and other improvements. The whole
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combination was released in 1988 as DELPHI Common Lisp (DCL).
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</p>
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<p>William F. Schelter in 1987 started improving KCL in several areas and
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developed Austin Kyoto Common-Lisp (AKCL). However, those changes had
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to be distributed as patches over the proprietary KCL implementation.
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</p>
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<p>Much later in 1994, when KCL became open source (and by extension also
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AKCL), William F. Schelter re-released AKCL as GNU Common Lisp (GCL),
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implementation which primary purpose at the time was to support the
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Maxima compute algebra system, which was also maintained by William
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F. Schelter.
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</p>
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<p>In 1995 another AKCL descendant called HCL is released. This
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commercial implementation is an extension language for the application
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HP PE/SolidDesigner. A large part of the application’s user interface
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is written in Common Lisp.
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</p>
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<p>In 1994 Giuseppe Attardi left DELPHI and went back to the University
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of Pisa, where he decided to build a version of DCL that would allow
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integrating Lisp code with other languages[see <a class="pxref" href="Bibliography.html">Attardi:95</a>]. Since
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Lisp had become less popular and Lisp programmers were diminishing in
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number, he used the acronym ECL, which could be read as either the
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Embeddable Common Lisp as well as ECoLisp, as a joke for the
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ecological goal of preserving the disappearing species, the Lisp
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programmer. The implementation achieved rather good compliance to the
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informal specification of the language in CLTL2 [see <a class="pxref" href="Bibliography.html">Steele:90</a>],
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and which run on a rather big number of platforms.
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</p>
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<p>The ECL project stagnated a little bit in the coming years. In
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particular, certain dependencies such as object binary formats, word
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sizes and some C quirks made it difficult to port it to new
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platforms. Furthermore, ECL was not compliant with the ANSI
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specification, a goal that other Common Lisps were struggling to
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achieve.
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</p>
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<p>This is where the ECLS or ECL-Spain project began. Juanjo García-Ripoll
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took the ECoLisp sources and worked on them, with some immediate goals
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in mind: increase portability, make the code 64-bit clean, make it able
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to build itself from scratch, without other implementation of Common
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Lisp and restore the ability to link ECL with other C programs.
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</p>
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<p>Those goals were rather quickly achieved. ECL was then ported to a
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number of platforms and with time the compatibility with the ANSI
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specification became a more important goal. At some point the fork
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ECLS, with agreement of Prof. Attardi, took over the original ECL
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implementation and it became what it is nowadays, a community project.
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</p>
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<p>In 2013 once again project got unmaintained. In 2015 Daniel Kochmański
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took the position of a maintainer with consent of Juanjo
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García-Ripoll. In 2020 Marius Gerbershagen became the project
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co-maintainer.
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</p>
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<p>The ECL project owes a lot to different people who have contributed in
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many different aspects, from pointing out bugs and incompatibilities of
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ECL with other programs and specifications, to actually solving these
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bugs and porting ECL to new platforms.
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</p>
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<p>Current development of ECL is still driven by Daniel Kochmański and
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Marius Gerbershagen with main focus on improving ANSI compliance and
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compatibility with the Common Lisp libraries ecosystem, fixing bugs,
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improving speed and the portability. The project homepage is located
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at <a class="uref" href="https://common-lisp.net/project/ecl/">https://common-lisp.net/project/ecl/</a>.
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</p></div>
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<hr>
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<div class="nav-panel">
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<p>
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Next: <a href="Credits.html" accesskey="n" rel="next">Credits</a>, Previous: <a href="What-is-ECL.html" accesskey="p" rel="prev">What is ECL</a>, Up: <a href="Introduction.html" accesskey="u" rel="up">Introduction</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indexes.html" title="Index" rel="index">Index</a>]</p>
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</div>
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