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📁 自己收集的linux入门到学懂高级编程书集包括linux程序设计第三版
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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 &copy; 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:&nbsp;<a name="Language%20Independent%20Options">Language Independent Options</a>,Next:&nbsp;<a rel="next" accesskey="n" href="Warning-Options.html#Warning%20Options">Warning Options</a>,Previous:&nbsp;<a rel="previous" accesskey="p" href="Objective-C-Dialect-Options.html#Objective-C%20Dialect%20Options">Objective-C Dialect Options</a>,Up:&nbsp;<a rel="up" accesskey="u" href="Invoking-GCC.html#Invoking%20GCC">Invoking GCC</a><hr><br></div><h3 class="section">Options to Control Diagnostic Messages Formatting</h3><p>Traditionally, diagnostic messages have been formatted irrespective ofthe output device's aspect (e.g. its width, <small class="dots">...</small>).  The options describedbelow can be used to control the diagnostic messages formattingalgorithm, e.g. how many characters per line, how often source locationinformation should be reported.  Right now, only the C++ front end canhonor these options.  However it is expected, in the near future, thatthe remaining front ends would be able to digest them correctly.     <dl><dt><code>-fmessage-length=</code><var>n</var><code></code>     <dd>Try to format error messages so that they fit on lines of about <var>n</var>characters.  The default is 72 characters for <code>g++</code> and 0 for the rest ofthe front ends supported by GCC.  If <var>n</var> is zero, then noline-wrapping will be done; each error message will appear on a singleline.     <br><dt><code>-fdiagnostics-show-location=once</code>     <dd>Only meaningful in line-wrapping mode.  Instructs the diagnostic messagesreporter to emit <em>once</em> source location information; that is, incase the message is too long to fit on a single physical line and has tobe wrapped, the source location won't be emitted (as prefix) again,over and over, in subsequent continuation lines.  This is the defaultbehavior.     <br><dt><code>-fdiagnostics-show-location=every-line</code>     <dd>Only meaningful in line-wrapping mode.  Instructs the diagnosticmessages reporter to emit the same source location information (asprefix) for physical lines that result from the process of breakinga message which is too long to fit on a single line.   </dl>   </body></html>
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