<html lang="en"> <head> <title>Darwin Format Checks - 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 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="Target-Format-Checks.html#Target-Format-Checks" title="Target Format Checks"> <link rel="prev" href="Solaris-Format-Checks.html#Solaris-Format-Checks" title="Solaris Format Checks"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- Copyright (C) 1988-2015 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.--> <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 } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="Darwin-Format-Checks"></a> <p> Previous: <a rel="previous" accesskey="p" href="Solaris-Format-Checks.html#Solaris-Format-Checks">Solaris Format Checks</a>, Up: <a rel="up" accesskey="u" href="Target-Format-Checks.html#Target-Format-Checks">Target Format Checks</a> <hr> </div> <h4 class="subsection">6.59.2 Darwin Format Checks</h4> <p>Darwin targets support the <code>CFString</code> (or <code>__CFString__</code>) in the format attribute context. Declarations made with such attribution are parsed for correct syntax and format argument types. However, parsing of the format string itself is currently undefined and is not carried out by this version of the compiler. <p>Additionally, <code>CFStringRefs</code> (defined by the <code>CoreFoundation</code> headers) may also be used as format arguments. Note that the relevant headers are only likely to be available on Darwin (OSX) installations. On such installations, the XCode and system documentation provide descriptions of <code>CFString</code>, <code>CFStringRefs</code> and associated functions. </body></html>