193 lines
7.2 KiB
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193 lines
7.2 KiB
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</head>
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<body lang="en">
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<div class="section-level-extent" id="What-is-ECL">
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<div class="nav-panel">
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<p>
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Next: <a href="History.html" accesskey="n" rel="next">History</a>, Previous: <a href="About-this-book.html" accesskey="p" rel="prev">About this book</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="What-is-ECL-1">What is ECL</h3>
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<p><span class="r">Common-Lisp</span> is a general purpose programming language. It lays its roots in
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the <abbr class="acronym">LISP</abbr> programming language [see <a class="pxref" href="Bibliography.html">LISP1.5</a>] developed by
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John McCarthy in the 80s. <span class="r">Common-Lisp</span> as we know it <span class="r">ANSI Common-Lisp</span> is the result
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of an standardization process aimed at unifying the multiple lisp
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dialects that were born from that language.
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</p>
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<p><b class="b"><span class="r">Embeddable Common Lisp</span></b> is an implementation of the <span class="r">Common-Lisp</span> language. As such it derives
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from the implementation of the same name developed by Giuseppe Attardi,
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which itself was built using code from the Kyoto Common-Lisp
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[see <a class="pxref" href="Bibliography.html">Yasa:85</a>]. <a class="ref" href="History.html">History</a> for the history of the code you are
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about to use.
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</p>
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<p><b class="b"><span class="r">Embeddable Common Lisp</span></b> (ECL for short) uses standard C calling conventions for Lisp
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compiled functions, which allows C programs to easily call Lisp
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functions and vice versa. No foreign function interface is required:
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data can be exchanged between C and Lisp with no need for conversion.
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</p>
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<p>ECL is based on a Common Runtime Support (CRS) which provides basic
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facilities for memory management, dynamic loading and dumping of binary
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images, support for multiple threads of execution. The CRS is built into
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a library that can be linked with the code of the application. ECL is
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modular: main modules are the program development tools (top level,
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debugger, trace, stepper), the compiler, and CLOS. A native
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implementation of CLOS is available in ECL. A runtime version of ECL can
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be built with just the modules which are required by the application.
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</p>
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<p>The ECL compiler compiles from Lisp to C, and then invokes the C
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compiler to produce binaries. Additionally portable bytecode compiler is
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provided for machines which doesn’t have C compiler. While former
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releases of ECL adhere to the the reference of the language given in
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<em class="emph"><span class="r">Common-Lisp</span>: The Language II</em> [see <a class="pxref" href="Bibliography.html">Steele90</a>], the ECL is now compliant with X3J13 ANSI
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Common Lisp [see <a class="pxref" href="Bibliography.html">ANSI</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="History.html" accesskey="n" rel="next">History</a>, Previous: <a href="About-this-book.html" accesskey="p" rel="prev">About this book</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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