зеркало из https://github.com/microsoft/clang-1.git
53 строки
2.4 KiB
HTML
53 строки
2.4 KiB
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
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<title>Clang - Universal Driver</title>
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<link type="text/css" rel="stylesheet" href="menu.css" />
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<link type="text/css" rel="stylesheet" href="content.css" />
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</head>
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<body>
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<!--#include virtual="menu.html.incl"-->
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<div id="content">
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<h1>The Clang Universal Driver Project</h1>
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<p>Clang is inherently a cross compiler, in that it is always capable of
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building code for targets which are a different architecture or even operating
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system from the one running the compiler. However, actually cross compiling in
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practice involves much more than just generating the right assembly code for a
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target, it also requires having an appropriate tool chain (assemblers, linkers),
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access to header files and libraries for the target, and many other details (for
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example, the calling convention or whether software floating point is in
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use). Traditionally, compilers and development environments provide little
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assistance with this process, so users do not have easy access to the powerful
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underlying cross-compilation abilities of clang.</p>
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<p>We would like to solve this problem by defining a new model for how cross
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compilation is done, based on the idea of a <i>universal driver</i>. The key
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point of this model is that the user would always access the compiler through a
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single entry point (e.g., <tt>/usr/bin/cc</tt>) and provide an argument
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specifying the <i>configuration</i> they would like to target. Under the hood
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this entry point (the universal driver) would have access to all the information
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that the driver, compiler, and other tools need to build applications for that
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target.</p>
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<p>This is a large and open-ended project. It's eventually success depends not
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just on implementing the model, but also on getting buy-in from compiler
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developers, operating system distribution vendors and the development community
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at large. Our plan is to begin by defining a clear list of the problems we want
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to solve and a proposed implementation (from the user perspective).</p>
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<p>This project is in the very early (i.e., thought experiment) stages of
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development. Stay tuned for more information, and of course, patches
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welcome!</p>
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<p>See also <a href="http://llvm.org/PR4127">PR4127</a>.</p>
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</div>
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</html>
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