113 lines
5 KiB
HTML
113 lines
5 KiB
HTML
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<!-- This manual describes ASDF, a system definition facility
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for Common Lisp programs and libraries.
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You can find the latest version of this manual at
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https://common-lisp.net/project/asdf/asdf.html.
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ASDF Copyright (C) 2001-2019 Daniel Barlow and contributors.
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This manual Copyright (C) 2001-2019 Daniel Barlow and contributors.
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This manual revised (C) 2009-2019 Robert P. Goldman and Francois-Rene Rideau.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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<title>Other code in .asd files (ASDF Manual)</title>
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<meta name="description" content="Other code in .asd files (ASDF Manual)">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Defining-systems-with-defsystem.html" rel="up" title="Defining systems with defsystem">
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<link href="The-package_002dinferred_002dsystem-extension.html" rel="next" title="The package-inferred-system extension">
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<link href="The-defsystem-grammar.html" rel="prev" title="The defsystem grammar">
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<div class="section" id="Other-code-in-_002easd-files">
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<div class="header">
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<p>
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Next: <a href="The-package_002dinferred_002dsystem-extension.html" accesskey="n" rel="next">The package-inferred-system extension</a>, Previous: <a href="The-defsystem-grammar.html" accesskey="p" rel="prev">The defsystem grammar</a>, Up: <a href="Defining-systems-with-defsystem.html" accesskey="u" rel="up">Defining systems with defsystem</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<span id="Other-code-in-_002easd-files-1"></span><h3 class="section">6.4 Other code in .asd files</h3>
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<p>Files containing <code>defsystem</code> forms
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are regular Lisp files that are executed by <code>load</code>.
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Consequently, you can put whatever Lisp code you like into these files.
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However, it is recommended to keep such forms to a minimal,
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and to instead define <code>defsystem</code> extensions
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that you use with <code>:defsystem-depends-on</code>.
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</p>
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<p>If however, you might insist on including code in the <samp>.asd</samp> file itself,
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e.g., to examine and adjust the compile-time environment,
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possibly adding appropriate features to <code>*features*</code>.
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If so, here are some conventions we recommend you follow,
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so that users can control certain details of execution
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of the Lisp in <samp>.asd</samp> files:
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</p>
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<ul>
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<li> Any informative output
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(other than warnings and errors,
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which are the condition system’s to dispose of)
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should be sent to the standard CL stream <code>*standard-output*</code>,
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so that users can easily control the disposition
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of output from ASDF operations.
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</li></ul>
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</div>
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</html>
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