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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gccint/Headers.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
Diffstat (limited to 'share/doc/gccint/Headers.html')
| -rw-r--r-- | share/doc/gccint/Headers.html | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/share/doc/gccint/Headers.html b/share/doc/gccint/Headers.html new file mode 100644 index 0000000..c0bd11d --- /dev/null +++ b/share/doc/gccint/Headers.html @@ -0,0 +1,129 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- 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>GNU Compiler Collection (GCC) Internals: Headers</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Headers"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Headers"> +<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="Option-Index.html#Option-Index" rel="index" title="Option Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="gcc-Directory.html#gcc-Directory" rel="up" title="gcc Directory"> +<link href="Documentation.html#Documentation" rel="next" title="Documentation"> +<link href="Library-Files.html#Library-Files" rel="previous" title="Library Files"> +<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" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Headers"></a> +<div class="header"> +<p> +Next: <a href="Documentation.html#Documentation" accesskey="n" rel="next">Documentation</a>, Previous: <a href="Library-Files.html#Library-Files" accesskey="p" rel="previous">Library Files</a>, Up: <a href="gcc-Directory.html#gcc-Directory" accesskey="u" rel="up">gcc Directory</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="Headers-Installed-by-GCC"></a> +<h4 class="subsection">6.3.6 Headers Installed by GCC</h4> + +<p>In general, GCC expects the system C library to provide most of the +headers to be used with it. However, GCC will fix those headers if +necessary to make them work with GCC, and will install some headers +required of freestanding implementations. These headers are installed +in <samp><var>libsubdir</var>/include</samp>. Headers for non-C runtime +libraries are also installed by GCC; these are not documented here. +(FIXME: document them somewhere.) +</p> +<p>Several of the headers GCC installs are in the <samp>ginclude</samp> +directory. These headers, <samp>iso646.h</samp>, +<samp>stdarg.h</samp>, <samp>stdbool.h</samp>, and <samp>stddef.h</samp>, +are installed in <samp><var>libsubdir</var>/include</samp>, +unless the target Makefile fragment (see <a href="Target-Fragment.html#Target-Fragment">Target Fragment</a>) +overrides this by setting <code>USER_H</code>. +</p> +<p>In addition to these headers and those generated by fixing system +headers to work with GCC, some other headers may also be installed in +<samp><var>libsubdir</var>/include</samp>. <samp>config.gcc</samp> may set +<code>extra_headers</code>; this specifies additional headers under +<samp>config</samp> to be installed on some systems. +</p> +<p>GCC installs its own version of <code><float.h></code>, from <samp>ginclude/float.h</samp>. +This is done to cope with command-line options that change the +representation of floating point numbers. +</p> +<p>GCC also installs its own version of <code><limits.h></code>; this is generated +from <samp>glimits.h</samp>, together with <samp>limitx.h</samp> and +<samp>limity.h</samp> if the system also has its own version of +<code><limits.h></code>. (GCC provides its own header because it is +required of ISO C freestanding implementations, but needs to include +the system header from its own header as well because other standards +such as POSIX specify additional values to be defined in +<code><limits.h></code>.) The system’s <code><limits.h></code> header is used via +<samp><var>libsubdir</var>/include/syslimits.h</samp>, which is copied from +<samp>gsyslimits.h</samp> if it does not need fixing to work with GCC; if it +needs fixing, <samp>syslimits.h</samp> is the fixed copy. +</p> +<p>GCC can also install <code><tgmath.h></code>. It will do this when +<samp>config.gcc</samp> sets <code>use_gcc_tgmath</code> to <code>yes</code>. +</p> +<hr> +<div class="header"> +<p> +Next: <a href="Documentation.html#Documentation" accesskey="n" rel="next">Documentation</a>, Previous: <a href="Library-Files.html#Library-Files" accesskey="p" rel="previous">Library Files</a>, Up: <a href="gcc-Directory.html#gcc-Directory" accesskey="u" rel="up">gcc Directory</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |