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diff --git a/share/doc/gcc/Invoking-GCC.html b/share/doc/gcc/Invoking-GCC.html new file mode 100644 index 0000000..ad16ef3 --- /dev/null +++ b/share/doc/gcc/Invoking-GCC.html @@ -0,0 +1,224 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- This file documents the use of the GNU compilers. + +Copyright (C) 1988-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). A copy of the license is included in the section entitled +"GNU Free Documentation License". + +(a) The FSF's Front-Cover Text is: + +A GNU Manual + +(b) The FSF's Back-Cover Text is: + +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. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Using the GNU Compiler Collection (GCC): Invoking GCC</title> + +<meta name="description" content="Using the GNU Compiler Collection (GCC): Invoking GCC"> +<meta name="keywords" content="Using the GNU Compiler Collection (GCC): Invoking GCC"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Indices.html#Indices" rel="index" title="Indices"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="index.html#Top" rel="up" title="Top"> +<link href="Option-Summary.html#Option-Summary" rel="next" title="Option Summary"> +<link href="Standards.html#Standards" rel="previous" title="Standards"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en_US" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Invoking-GCC"></a> +<div class="header"> +<p> +Next: <a href="C-Implementation.html#C-Implementation" accesskey="n" rel="next">C Implementation</a>, Previous: <a href="Standards.html#Standards" accesskey="p" rel="previous">Standards</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="GCC-Command-Options"></a> +<h2 class="chapter">3 GCC Command Options</h2> +<a name="index-GCC-command-options"></a> +<a name="index-command-options"></a> +<a name="index-options_002c-GCC-command"></a> + +<p>When you invoke GCC, it normally does preprocessing, compilation, +assembly and linking. The “overall options” allow you to stop this +process at an intermediate stage. For example, the <samp>-c</samp> option +says not to run the linker. Then the output consists of object files +output by the assembler. +See <a href="Overall-Options.html#Overall-Options">Options Controlling the Kind of Output</a>. +</p> +<p>Other options are passed on to one or more stages of processing. Some options +control the preprocessor and others the compiler itself. Yet other +options control the assembler and linker; most of these are not +documented here, since you rarely need to use any of them. +</p> +<a name="index-C-compilation-options"></a> +<p>Most of the command-line options that you can use with GCC are useful +for C programs; when an option is only useful with another language +(usually C++), the explanation says so explicitly. If the description +for a particular option does not mention a source language, you can use +that option with all supported languages. +</p> +<a name="index-cross-compiling"></a> +<a name="index-specifying-machine-version"></a> +<a name="index-specifying-compiler-version-and-target-machine"></a> +<a name="index-compiler-version_002c-specifying"></a> +<a name="index-target-machine_002c-specifying"></a> +<p>The usual way to run GCC is to run the executable called <code>gcc</code>, or +<code><var>machine</var>-gcc</code> when cross-compiling, or +<code><var>machine</var>-gcc-<var>version</var></code> to run a specific version of GCC. +When you compile C++ programs, you should invoke GCC as <code>g++</code> +instead. See <a href="Invoking-G_002b_002b.html#Invoking-G_002b_002b">Compiling C++ Programs</a>, +for information about the differences in behavior between <code>gcc</code> +and <code>g++</code> when compiling C++ programs. +</p> +<a name="index-grouping-options"></a> +<a name="index-options_002c-grouping"></a> +<p>The <code>gcc</code> program accepts options and file names as operands. Many +options have multi-letter names; therefore multiple single-letter options +may <em>not</em> be grouped: <samp>-dv</samp> is very different from ‘<samp><span class="nolinebreak">-d</span> <span class="nolinebreak">-v</span></samp>’<!-- /@w -->. +</p> +<a name="index-order-of-options"></a> +<a name="index-options_002c-order"></a> +<p>You can mix options and other arguments. For the most part, the order +you use doesn’t matter. Order does matter when you use several +options of the same kind; for example, if you specify <samp>-L</samp> more +than once, the directories are searched in the order specified. Also, +the placement of the <samp>-l</samp> option is significant. +</p> +<p>Many options have long names starting with ‘<samp>-f</samp>’ or with +‘<samp>-W</samp>’—for example, +<samp>-fmove-loop-invariants</samp>, <samp>-Wformat</samp> and so on. Most of +these have both positive and negative forms; the negative form of +<samp>-ffoo</samp> is <samp>-fno-foo</samp>. This manual documents +only one of these two forms, whichever one is not the default. +</p> +<p>Some options take one or more arguments typically separated either +by a space or by the equals sign (‘<samp>=</samp>’) from the option name. +Unless documented otherwise, an argument can be either numeric or +a string. Numeric arguments must typically be small unsigned decimal +or hexadecimal integers. Hexadecimal arguments must begin with +the ‘<samp>0x</samp>’ prefix. Arguments to options that specify a size +threshold of some sort may be arbitrarily large decimal or hexadecimal +integers followed by a byte size suffix designating a multiple of bytes +such as <code>kB</code> and <code>KiB</code> for kilobyte and kibibyte, respectively, +<code>MB</code> and <code>MiB</code> for megabyte and mebibyte, <code>GB</code> and +<code>GiB</code> for gigabyte and gigibyte, and so on. Such arguments are +designated by <var>byte-size</var> in the following text. Refer to the NIST, +IEC, and other relevant national and international standards for the full +listing and explanation of the binary and decimal byte size prefixes. +</p> + +<p>See <a href="Option-Index.html#Option-Index">Option Index</a>, for an index to GCC’s options. +</p> +<table class="menu" border="0" cellspacing="0"> +<tr><td align="left" valign="top">• <a href="Option-Summary.html#Option-Summary" accesskey="1">Option Summary</a>:</td><td> </td><td align="left" valign="top">Brief list of all options, without explanations. +</td></tr> +<tr><td align="left" valign="top">• <a href="Overall-Options.html#Overall-Options" accesskey="2">Overall Options</a>:</td><td> </td><td align="left" valign="top">Controlling the kind of output: + an executable, object files, assembler files, + or preprocessed source. +</td></tr> +<tr><td align="left" valign="top">• <a href="Invoking-G_002b_002b.html#Invoking-G_002b_002b" accesskey="3">Invoking G++</a>:</td><td> </td><td align="left" valign="top">Compiling C++ programs. +</td></tr> +<tr><td align="left" valign="top">• <a href="C-Dialect-Options.html#C-Dialect-Options" accesskey="4">C Dialect Options</a>:</td><td> </td><td align="left" valign="top">Controlling the variant of C language compiled. +</td></tr> +<tr><td align="left" valign="top">• <a href="C_002b_002b-Dialect-Options.html#C_002b_002b-Dialect-Options" accesskey="5">C++ Dialect Options</a>:</td><td> </td><td align="left" valign="top">Variations on C++. +</td></tr> +<tr><td align="left" valign="top">• <a href="Objective_002dC-and-Objective_002dC_002b_002b-Dialect-Options.html#Objective_002dC-and-Objective_002dC_002b_002b-Dialect-Options" accesskey="6">Objective-C and Objective-C++ Dialect Options</a>:</td><td> </td><td align="left" valign="top">Variations on Objective-C + and Objective-C++. +</td></tr> +<tr><td align="left" valign="top">• <a href="Diagnostic-Message-Formatting-Options.html#Diagnostic-Message-Formatting-Options" accesskey="7">Diagnostic Message Formatting Options</a>:</td><td> </td><td align="left" valign="top">Controlling how diagnostics should + be formatted. +</td></tr> +<tr><td align="left" valign="top">• <a href="Warning-Options.html#Warning-Options" accesskey="8">Warning Options</a>:</td><td> </td><td align="left" valign="top">How picky should the compiler be? +</td></tr> +<tr><td align="left" valign="top">• <a href="Static-Analyzer-Options.html#Static-Analyzer-Options" accesskey="9">Static Analyzer Options</a>:</td><td> </td><td align="left" valign="top">More expensive warnings. +</td></tr> +<tr><td align="left" valign="top">• <a href="Debugging-Options.html#Debugging-Options">Debugging Options</a>:</td><td> </td><td align="left" valign="top">Producing debuggable code. +</td></tr> +<tr><td align="left" valign="top">• <a href="Optimize-Options.html#Optimize-Options">Optimize Options</a>:</td><td> </td><td align="left" valign="top">How much optimization? +</td></tr> +<tr><td align="left" valign="top">• <a href="Instrumentation-Options.html#Instrumentation-Options">Instrumentation Options</a>:</td><td> </td><td align="left" valign="top">Enabling profiling and extra run-time error checking. +</td></tr> +<tr><td align="left" valign="top">• <a href="Preprocessor-Options.html#Preprocessor-Options">Preprocessor Options</a>:</td><td> </td><td align="left" valign="top">Controlling header files and macro definitions. + Also, getting dependency information for Make. +</td></tr> +<tr><td align="left" valign="top">• <a href="Assembler-Options.html#Assembler-Options">Assembler Options</a>:</td><td> </td><td align="left" valign="top">Passing options to the assembler. +</td></tr> +<tr><td align="left" valign="top">• <a href="Link-Options.html#Link-Options">Link Options</a>:</td><td> </td><td align="left" valign="top">Specifying libraries and so on. +</td></tr> +<tr><td align="left" valign="top">• <a href="Directory-Options.html#Directory-Options">Directory Options</a>:</td><td> </td><td align="left" valign="top">Where to find header files and libraries. + Where to find the compiler executable files. +</td></tr> +<tr><td align="left" valign="top">• <a href="Code-Gen-Options.html#Code-Gen-Options">Code Gen Options</a>:</td><td> </td><td align="left" valign="top">Specifying conventions for function calls, data layout + and register usage. +</td></tr> +<tr><td align="left" valign="top">• <a href="Developer-Options.html#Developer-Options">Developer Options</a>:</td><td> </td><td align="left" valign="top">Printing GCC configuration info, statistics, and + debugging dumps. +</td></tr> +<tr><td align="left" valign="top">• <a href="Submodel-Options.html#Submodel-Options">Submodel Options</a>:</td><td> </td><td align="left" valign="top">Target-specific options, such as compiling for a + specific processor variant. +</td></tr> +<tr><td align="left" valign="top">• <a href="Spec-Files.html#Spec-Files">Spec Files</a>:</td><td> </td><td align="left" valign="top">How to pass switches to sub-processes. +</td></tr> +<tr><td align="left" valign="top">• <a href="Environment-Variables.html#Environment-Variables">Environment Variables</a>:</td><td> </td><td align="left" valign="top">Env vars that affect GCC. +</td></tr> +<tr><td align="left" valign="top">• <a href="Precompiled-Headers.html#Precompiled-Headers">Precompiled Headers</a>:</td><td> </td><td align="left" valign="top">Compiling a header once, and using it many times. +</td></tr> +<tr><td align="left" valign="top">• <a href="C_002b_002b-Modules.html#C_002b_002b-Modules">C++ Modules</a>:</td><td> </td><td align="left" valign="top">Experimental C++20 module system. +</td></tr> +</table> + + +<hr> +<div class="header"> +<p> +Next: <a href="C-Implementation.html#C-Implementation" accesskey="n" rel="next">C Implementation</a>, Previous: <a href="Standards.html#Standards" accesskey="p" rel="previous">Standards</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |