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<html lang="en"><head><title>Using the GNU Compiler Collection (GCC)</title><meta http-equiv="Content-Type" content="text/html"><meta name="description" content="Using the GNU Compiler Collection (GCC)"><meta name="generator" content="makeinfo 4.6"><!--Copyright © 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. <p>Permission is granted to copy, distribute and/or modify this documentunder the terms of the GNU Free Documentation License, Version 1.2 orany later version published by the Free Software Foundation; with theInvariant Sections being "GNU General Public License" and "FundingFree Software", the Front-Cover texts being (a) (see below), and withthe Back-Cover Texts being (b) (see below). A copy of the license isincluded in the section entitled "GNU Free Documentation License". <p>(a) The FSF's Front-Cover Text is: <p>A GNU Manual <p>(b) The FSF's Back-Cover Text is: <p>You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.--><meta http-equiv="Content-Style-Type" content="text/css"><style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller }--></style></head><body><div class="node"><p>Node: <a name="Target%20Options">Target Options</a>,Next: <a rel="next" accesskey="n" href="Submodel-Options.html#Submodel%20Options">Submodel Options</a>,Previous: <a rel="previous" accesskey="p" href="Spec-Files.html#Spec%20Files">Spec Files</a>,Up: <a rel="up" accesskey="u" href="Invoking-GCC.html#Invoking%20GCC">Invoking GCC</a><hr><br></div><h3 class="section">Specifying Target Machine and Compiler Version</h3><p>The usual way to run GCC is to run the executable called <code>gcc</code>, or<code><machine>-gcc</code> when cross-compiling, or<code><machine>-gcc-<version></code> to run a version other than the one thatwas installed last. Sometimes this is inconvenient, so GCC providesoptions that will switch to another cross-compiler or version. <dl><dt><code>-b </code><var>machine</var><code></code> <dd>The argument <var>machine</var> specifies the target machine for compilation. <p>The value to use for <var>machine</var> is the same as was specified as themachine type when configuring GCC as a cross-compiler. Forexample, if a cross-compiler was configured with <code>configurei386v</code>, meaning to compile for an 80386 running System V, then youwould specify <code>-b i386v</code> to run that cross compiler. <br><dt><code>-V </code><var>version</var><code></code> <dd>The argument <var>version</var> specifies which version of GCC to run. This is useful when multiple versions are installed. For example,<var>version</var> might be <code>2.0</code>, meaning to run GCC version 2.0. </dl> <p>The <code>-V</code> and <code>-b</code> options work by running the<code><machine>-gcc-<version></code> executable, so there's no real reason touse them if you can just run that directly. </body></html>⌨️ 快捷键说明
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