1<html lang="en"> 2<head> 3<title>Darwin Format Checks - Using the GNU Compiler Collection (GCC)</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Using the GNU Compiler Collection (GCC)"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Target-Format-Checks.html#Target-Format-Checks" title="Target Format Checks"> 9<link rel="prev" href="Solaris-Format-Checks.html#Solaris-Format-Checks" title="Solaris Format Checks"> 10<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 11<!-- 12Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 131998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 142010 Free Software Foundation, Inc. 15 16Permission is granted to copy, distribute and/or modify this document 17under the terms of the GNU Free Documentation License, Version 1.3 or 18any later version published by the Free Software Foundation; with the 19Invariant Sections being ``Funding Free Software'', the Front-Cover 20Texts being (a) (see below), and with the Back-Cover Texts being (b) 21(see below). A copy of the license is included in the section entitled 22``GNU Free Documentation License''. 23 24(a) The FSF's Front-Cover Text is: 25 26 A GNU Manual 27 28(b) The FSF's Back-Cover Text is: 29 30 You have freedom to copy and modify this GNU Manual, like GNU 31 software. Copies published by the Free Software Foundation raise 32 funds for GNU development.--> 33<meta http-equiv="Content-Style-Type" content="text/css"> 34<style type="text/css"><!-- 35 pre.display { font-family:inherit } 36 pre.format { font-family:inherit } 37 pre.smalldisplay { font-family:inherit; font-size:smaller } 38 pre.smallformat { font-family:inherit; font-size:smaller } 39 pre.smallexample { font-size:smaller } 40 pre.smalllisp { font-size:smaller } 41 span.sc { font-variant:small-caps } 42 span.roman { font-family:serif; font-weight:normal; } 43 span.sansserif { font-family:sans-serif; font-weight:normal; } 44--></style> 45<link rel="stylesheet" type="text/css" href="../cs.css"> 46</head> 47<body> 48<div class="node"> 49<a name="Darwin-Format-Checks"></a> 50<p> 51Previous: <a rel="previous" accesskey="p" href="Solaris-Format-Checks.html#Solaris-Format-Checks">Solaris Format Checks</a>, 52Up: <a rel="up" accesskey="u" href="Target-Format-Checks.html#Target-Format-Checks">Target Format Checks</a> 53<hr> 54</div> 55 56<h4 class="subsection">6.55.2 Darwin Format Checks</h4> 57 58<p>Darwin targets support the <code>CFString</code> (or <code>__CFString__</code>) in the format 59attribute context. Declarations made with such attribution will be parsed for correct syntax 60and format argument types. However, parsing of the format string itself is currently undefined 61and will not be carried out by this version of the compiler. 62 63 <p>Additionally, <code>CFStringRefs</code> (defined by the <code>CoreFoundation</code> headers) may 64also be used as format arguments. Note that the relevant headers are only likely to be 65available on Darwin (OSX) installations. On such installations, the XCode and system 66documentation provide descriptions of <code>CFString</code>, <code>CFStringRefs</code> and 67associated functions. 68 69 </body></html> 70 71