diff options
| author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2017-02-17 21:28:53 +0000 |
|---|---|---|
| committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2017-02-17 21:28:53 +0000 |
| commit | 189d7eb970b025c570c7ccce916759083373bdde (patch) | |
| tree | f4f7c3a71ecc7851a8a7b86206bbb202b5cab551 /NEWS.html | |
| download | ccache-tarball-189d7eb970b025c570c7ccce916759083373bdde.tar.gz | |
ccache-3.3.4HEADccache-3.3.4master
Diffstat (limited to 'NEWS.html')
| -rw-r--r-- | NEWS.html | 2742 |
1 files changed, 2742 insertions, 0 deletions
diff --git a/NEWS.html b/NEWS.html new file mode 100644 index 0000000..6e8af4f --- /dev/null +++ b/NEWS.html @@ -0,0 +1,2742 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
+ "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
+<head>
+<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
+<meta name="generator" content="AsciiDoc 8.6.9" />
+<title>ccache news</title>
+<style type="text/css">
+/* Shared CSS for AsciiDoc xhtml11 and html5 backends */
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+/* Default font. */
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+ font-family: Georgia,serif;
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+/* Title font. */
+h1, h2, h3, h4, h5, h6,
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+thead, p.table.header,
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+#author, #revnumber, #revdate, #revremark,
+#footer {
+ font-family: Arial,Helvetica,sans-serif;
+}
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+ margin: 1em 5% 1em 5%;
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+ font-size: inherit;
+ color: navy;
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+#footnotes {
+ margin: 20px 0 20px 0;
+ padding: 7px 0 0 0;
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+#footnotes div.footnote {
+ margin: 0 0 5px 0;
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+#footnotes hr {
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+ height: 1px;
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+ min-width: 100px;
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+@media print {
+ #footer-badges { display: none; }
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+ margin-bottom: 2.5em;
+}
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+ color: #527bbd;
+ font-size: 1.1em;
+ font-weight: bold;
+ margin-top: 1.0em;
+ margin-bottom: 0.1em;
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+ * xhtml11 specific
+ *
+ * */
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+div.tableblock {
+ margin-top: 1.0em;
+ margin-bottom: 1.5em;
+}
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+ border: 3px solid #527bbd;
+}
+thead, p.table.header {
+ font-weight: bold;
+ color: #527bbd;
+}
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+ margin-top: 0;
+}
+/* Because the table frame attribute is overriden by CSS in most browsers. */
+div.tableblock > table[frame="void"] {
+ border-style: none;
+}
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+ border-top-style: none;
+ border-bottom-style: none;
+}
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+/*
+ * html5 specific
+ *
+ * */
+
+table.tableblock {
+ margin-top: 1.0em;
+ margin-bottom: 1.5em;
+}
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+ font-weight: bold;
+ color: #527bbd;
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+}
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+ vertical-align: bottom;
+}
+
+
+/*
+ * manpage specific
+ *
+ * */
+
+body.manpage h1 {
+ padding-top: 0.5em;
+ padding-bottom: 0.5em;
+ border-top: 2px solid silver;
+ border-bottom: 2px solid silver;
+}
+body.manpage h2 {
+ border-style: none;
+}
+body.manpage div.sectionbody {
+ margin-left: 3em;
+}
+
+@media print {
+ body.manpage div#toc { display: none; }
+}
+
+
+</style>
+<script type="text/javascript">
+/*<+'])');
+ // Function that scans the DOM tree for header elements (the DOM2
+ // nodeIterator API would be a better technique but not supported by all
+ // browsers).
+ var iterate = function (el) {
+ for (var i = el.firstChild; i != null; i = i.nextSibling) {
+ if (i.nodeType == 1 /* Node.ELEMENT_NODE */) {
+ var mo = re.exec(i.tagName);
+ if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") {
+ result[result.length] = new TocEntry(i, getText(i), mo[1]-1);
+ }
+ iterate(i);
+ }
+ }
+ }
+ iterate(el);
+ return result;
+ }
+
+ var toc = document.getElementById("toc");
+ if (!toc) {
+ return;
+ }
+
+ // Delete existing TOC entries in case we're reloading the TOC.
+ var tocEntriesToRemove = [];
+ var i;
+ for (i = 0; i < toc.childNodes.length; i++) {
+ var entry = toc.childNodes[i];
+ if (entry.nodeName.toLowerCase() == 'div'
+ && entry.getAttribute("class")
+ && entry.getAttribute("class").match(/^toclevel/))
+ tocEntriesToRemove.push(entry);
+ }
+ for (i = 0; i < tocEntriesToRemove.length; i++) {
+ toc.removeChild(tocEntriesToRemove[i]);
+ }
+
+ // Rebuild TOC entries.
+ var entries = tocEntries(document.getElementById("content"), toclevels);
+ for (var i = 0; i < entries.length; ++i) {
+ var entry = entries[i];
+ if (entry.element.id == "")
+ entry.element.id = "_toc_" + i;
+ var a = document.createElement("a");
+ a.href = "#" + entry.element.id;
+ a.appendChild(document.createTextNode(entry.text));
+ var div = document.createElement("div");
+ div.appendChild(a);
+ div.className = "toclevel" + entry.toclevel;
+ toc.appendChild(div);
+ }
+ if (entries.length == 0)
+ toc.parentNode.removeChild(toc);
+},
+
+
+/////////////////////////////////////////////////////////////////////
+// Footnotes generator
+/////////////////////////////////////////////////////////////////////
+
+/* Based on footnote generation code from:
+ * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html
+ */
+
+footnotes: function () {
+ // Delete existing footnote entries in case we're reloading the footnodes.
+ var i;
+ var noteholder = document.getElementById("footnotes");
+ if (!noteholder) {
+ return;
+ }
+ var entriesToRemove = [];
+ for (i = 0; i < noteholder.childNodes.length; i++) {
+ var entry = noteholder.childNodes[i];
+ if (entry.nodeName.toLowerCase() == 'div' && entry.getAttribute("class") == "footnote")
+ entriesToRemove.push(entry);
+ }
+ for (i = 0; i < entriesToRemove.length; i++) {
+ noteholder.removeChild(entriesToRemove[i]);
+ }
+
+ // Rebuild footnote entries.
+ var cont = document.getElementById("content");
+ var spans = cont.getElementsByTagName("span");
+ var refs = {};
+ var n = 0;
+ for (i=0; i<spans.length; i++) {
+ if (spans[i].className == "footnote") {
+ n++;
+ var note = spans[i].getAttribute("data-note");
+ if (!note) {
+ // Use [\s\S] in place of . so multi-line matches work.
+ // Because JavaScript has no s (dotall) regex flag.
+ note = spans[i].innerHTML.match(/\s*\[([\s\S]*)]\s*/)[1];
+ spans[i].innerHTML =
+ "[<a id='_footnoteref_" + n + "' href='#_footnote_" + n +
+ "' title='View footnote' class='footnote'>" + n + "</a>]";
+ spans[i].setAttribute("data-note", note);
+ }
+ noteholder.innerHTML +=
+ "<div class='footnote' id='_footnote_" + n + "'>" +
+ "<a href='#_footnoteref_" + n + "' title='Return to text'>" +
+ n + "</a>. " + note + "</div>";
+ var id =spans[i].getAttribute("id");
+ if (id != null) refs["#"+id] = n;
+ }
+ }
+ if (n == 0)
+ noteholder.parentNode.removeChild(noteholder);
+ else {
+ // Process footnoterefs.
+ for (i=0; i<spans.length; i++) {
+ if (spans[i].className == "footnoteref") {
+ var href = spans[i].getElementsByTagName("a")[0].getAttribute("href");
+ href = href.match(/#.*/)[0]; // Because IE return full URL.
+ n = refs[href];
+ spans[i].innerHTML =
+ "[<a href='#_footnote_" + n +
+ "' title='View footnote' class='footnote'>" + n + "</a>]";
+ }
+ }
+ }
+},
+
+install: function(toclevels) {
+ var timerId;
+
+ function reinstall() {
+ asciidoc.footnotes();
+ if (toclevels) {
+ asciidoc.toc(toclevels);
+ }
+ }
+
+ function reinstallAndRemoveTimer() {
+ clearInterval(timerId);
+ reinstall();
+ }
+
+ timerId = setInterval(reinstall, 500);
+ if (document.addEventListener)
+ document.addEventListener("DOMContentLoaded", reinstallAndRemoveTimer, false);
+ else
+ window.onload = reinstallAndRemoveTimer;
+}
+
+}
+asciidoc.install(2);
+/*]]>*/
+</script>
+</head>
+<body class="article">
+<div id="header">
+<h1>ccache news</h1>
+<span id="revnumber">version 3.3.4</span>
+<div id="toc"> + <div id="toctitle">Table of Contents</div> + <noscript><p><b>JavaScript must be enabled in your browser to display the table of contents.</b></p></noscript> +</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_ccache_3_3_4">ccache 3.3.4</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2017-02-17</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Documented the different cache statistics counters.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed a regression in ccache 3.3 related to potentially bad content of
+ dependency files when compiling identical source code but with different
+ source paths. This was only partially fixed in 3.3.2 and reverts the new
+ “Names of included files are no longer included in the hash of the
+ compiler’s preprocessed output” feature in 3.3.
+</p>
+</li>
+<li>
+<p>
+Corrected statistics counter for <code>-optf</code>/<code>--options-file</code> failure.
+</p>
+</li>
+<li>
+<p>
+Fixed undefined behavior warnings in ccache found by <code>-fsanitize=undefined</code>.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_3_3">ccache 3.3.3</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-10-26</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_2">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+ccache now detects usage of <code>.incbin</code> assembler directives in the source code
+ and avoids caching such compilations.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_3_2">ccache 3.3.2</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-09-28</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_3">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed a regression in ccache 3.3 related to potentially bad content of
+ dependency files when compiling identical source code but with different
+ source paths.
+</p>
+</li>
+<li>
+<p>
+Fixed a regression in ccache 3.3.1: ccache could get confused when using the
+ compiler option <code>-Wp,</code> to pass multiple options to the preprocessor,
+ resulting in missing dependency files from direct mode cache hits.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_3_1">ccache 3.3.1</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-09-07</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_4">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed a problem in the “multiple <code>-arch</code> options” support introduced in
+ 3.3. When using the direct mode (the default), different combinations of
+ <code>-arch</code> options were not detected properly.
+</p>
+</li>
+<li>
+<p>
+Fixed an issue when compiler option <code>-Wp,-MT,path</code> is used instead of <code>-MT
+ path</code> (and similar for <code>-MF</code>, <code>-MP</code> and <code>-MQ</code>) and <code>run_second_cpp</code>
+ (<code>CCACHE_CPP2</code>) is enabled.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_3">ccache 3.3</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-08-27</p></div>
+<div class="sect2">
+<h3 id="_notes">Notes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+A C99-compatible compiler is now required to build ccache.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_2">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+The configuration option <code>run_second_cpp</code> (<code>CCACHE_CPP2</code>) now defaults to
+ true. This improves ccache’s out-of-the-box experience for compilers that
+ can’t compile their own preprocessed output with the same outcome as if they
+ compiled the real source code directly, e.g. newer versions of GCC and Clang.
+</p>
+</li>
+<li>
+<p>
+The configuration option <code>hash_dir</code> (<code>CCACHE_HASHDIR</code>) now defaults to true.
+</p>
+</li>
+<li>
+<p>
+Added a new <code>ignore_headers_in_manifest</code> configuration option, which
+ specifies headers that should be ignored in the direct mode.
+</p>
+</li>
+<li>
+<p>
+Added a new <code>prefix_command_cpp</code> (<code>CCACHE_PREFIX_CPP</code>) configuration option,
+ which specifies one or several prefixes to add to the command line ccache
+ uses when invoking the preprocessor.
+</p>
+</li>
+<li>
+<p>
+Added a new <code>limit_multiple</code> (<code>CCACHE_LIMIT_MULTIPLE</code>) configuration option,
+ which specifies how much of the cache to remove when cleaning.
+</p>
+</li>
+<li>
+<p>
+Added a new <code>keep_comments_cpp</code> (<code>CCACHE_COMMENTS</code>) configuration option,
+ which tells ccache not to discard the comments before hashing preprocessor
+ output. This can be used to check documentation with <strong>-Wdocumentation</strong>.
+</p>
+</li>
+<li>
+<p>
+Added a new sloppiness option <code>no_system_headers</code>, which tells ccache not to
+ include system headers in manifest files.
+</p>
+</li>
+<li>
+<p>
+Added a new statistics counter that tracks the number of performed cleanups
+ due to the cache size being over the limit. The value is shown in the output
+ of “ccache -s”.
+</p>
+</li>
+<li>
+<p>
+Added support for relocating debug info directory using <code>-fdebug-prefix-map</code>.
+ This allows for cache hits even when <code>hash_dir</code> is used in combination with
+ <code>base_dir</code>.
+</p>
+</li>
+<li>
+<p>
+Added a new “cache hit rate” field to the output of “ccache -s”.
+</p>
+</li>
+<li>
+<p>
+Added support for caching compilation of assembler code produced by e.g.
+ “gcc -S file.c”.
+</p>
+</li>
+<li>
+<p>
+Added support for cuda including the -optf/--options-file option.
+</p>
+</li>
+<li>
+<p>
+Added support for Fortran 77.
+</p>
+</li>
+<li>
+<p>
+Added support for multiple <code>-arch</code> options to produce "fat binaries".
+</p>
+</li>
+<li>
+<p>
+Multiple identical <code>-arch</code> arguments are now handled without bailing.
+</p>
+</li>
+<li>
+<p>
+The concatenated form of some long compiler options is now recognized, for
+ example when using <code>-isystemPATH</code> instead of <code>-isystem PATH</code>.
+</p>
+</li>
+<li>
+<p>
+If hard-linking is enabled and but fails (e.g. due to cross-device linking),
+ ccache now falls back to copying instead of running the compiler.
+</p>
+</li>
+<li>
+<p>
+Made the <code>hash_dir</code> option only have effect when generating debug info.
+</p>
+</li>
+<li>
+<p>
+ccache now knows how to convert absolute paths to relative paths inside
+ dependency files when using <code>base_dir</code>.
+</p>
+</li>
+<li>
+<p>
+Improved parsing of <code>-g*</code> options.
+</p>
+</li>
+<li>
+<p>
+Made ccache understand <code>-Wp,-D*</code> options.
+</p>
+</li>
+<li>
+<p>
+ccache now understands the undocumented <code>-coverage</code> (only one dash) GCC
+ option.
+</p>
+</li>
+<li>
+<p>
+Names of included files are no longer included in the hash of the compiler’s
+ preprocessed output. This leads to more potential cache hits when not using
+ the direct mode.
+</p>
+</li>
+<li>
+<p>
+Increased buffer size used when reading file data. This improves performance
+ slightly.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_5">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Bail out on too hard compiler option <code>-P</code>.
+</p>
+</li>
+<li>
+<p>
+Fixed clang test suite when running on Linux.
+</p>
+</li>
+<li>
+<p>
+Fixed build and test for MinGW32 and Windows.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_9">ccache 3.2.9</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-09-28</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_6">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed a regression in ccache 3.2.8: ccache could get confused when using the
+ compiler option <code>-Wp,</code> to pass multiple options to the preprocessor,
+ resulting in missing dependency files from direct mode cache hits.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_8">ccache 3.2.8</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-09-07</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_7">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed an issue when compiler option <code>-Wp,-MT,path</code> is used instead of <code>-MT
+ path</code> (and similar for <code>-MF</code>, <code>-MP</code> and <code>-MQ</code>) and <code>run_second_cpp</code>
+ (<code>CCACHE_CPP2</code>) is enabled.
+</p>
+</li>
+<li>
+<p>
+ccache now understands the undocumented <code>-coverage</code> (only one dash) GCC
+ option.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_7">ccache 3.2.7</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-07-20</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_8">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed a bug which could lead to false cache hits for compiler command lines
+ with a missing argument to an option that takes an argument.
+</p>
+</li>
+<li>
+<p>
+ccache now knows how to work around a glitch in the output of GCC 6’s
+ preprocessor.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_6">ccache 3.2.6</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-07-12</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_9">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed build problem on QNX, which lacks “SA_RESTART”.
+</p>
+</li>
+<li>
+<p>
+Bail out on compiler option <code>-fstack-usage</code> since it creates a <code>.su</code> file
+ which ccache currently doesn’t handle.
+</p>
+</li>
+<li>
+<p>
+Fixed a bug where (due to ccache rewriting paths) the compiler could choose
+ incorrect include files if <code>CCACHE_BASEDIR</code> is used and the source file path
+ is absolute and is a symlink.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_5">ccache 3.2.5</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-04-17</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_3">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Only pass clang-specific <code>-stdlib=</code> to the preprocessor.
+</p>
+</li>
+<li>
+<p>
+Improved handling of stale NFS handles.
+</p>
+</li>
+<li>
+<p>
+Made it harder to misinterpret documentation of boolean environment settings'
+ semantics.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_10">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Include m4 files used by configure.ac in the source dist archives.
+</p>
+</li>
+<li>
+<p>
+Corrected "Performance" section in the manual regarding <code>__DATE_</code>, <code>__TIME__</code>
+ and <code>__FILE__</code> macros.
+</p>
+</li>
+<li>
+<p>
+Fixed build on Solaris 10+ and AIX 7.
+</p>
+</li>
+<li>
+<p>
+Fixed failure to create directories on QNX.
+</p>
+</li>
+<li>
+<p>
+Don’t (try to) update manifest file in “read-only” and “read-only direct”
+ modes.
+</p>
+</li>
+<li>
+<p>
+Fixed a bug in caching of <code>stat</code> system calls in “file_stat_matches
+ sloppiness mode”.
+</p>
+</li>
+<li>
+<p>
+Fixed bug in hashing of clang plugins, leading to unnecessary cache misses.
+</p>
+</li>
+<li>
+<p>
+Fixed --print-config to show “pch_defines sloppiness”.
+</p>
+</li>
+<li>
+<p>
+The man page is now built when running “make install” from Git repository
+ sources.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_4">ccache 3.2.4</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2015-10-08</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_11">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed build error related to zlib on systems with older make versions
+ (regression in ccache 3.2.3).
+</p>
+</li>
+<li>
+<p>
+Made conversion-to-bool explicit to avoid build warnings (and potential
+ runtime errors) on legacy systems.
+</p>
+</li>
+<li>
+<p>
+Improved signal handling: Kill compiler on SIGTERM; wait for compiler to exit
+ before exiting; die appropriately.
+</p>
+</li>
+<li>
+<p>
+Minor fixes related to Windows support.
+</p>
+</li>
+<li>
+<p>
+The correct compression level is now used if compression is requested.
+</p>
+</li>
+<li>
+<p>
+Fixed a bug where cache cleanup could be run too early for caches larger than
+ 64 GiB on 32-bit systems.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_3">ccache 3.2.3</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2015-08-16</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_4">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Added support for compiler option <code>-gsplit-dwarf</code>.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_12">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Support external zlib in nonstandard directory.
+</p>
+</li>
+<li>
+<p>
+Avoid calling <code>exit()</code> inside an exit handler.
+</p>
+</li>
+<li>
+<p>
+Let exit handler terminate properly.
+</p>
+</li>
+<li>
+<p>
+Bail out on compiler option <code>--save-temps</code> in addition to <code>-save-temps</code>.
+</p>
+</li>
+<li>
+<p>
+Only log "Disabling direct mode" once when failing to read potential include
+ files.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_2">ccache 3.2.2</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2015-05-10</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_5">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Added support for <code>CCACHE_COMPILERCHECK=string:<value></code>. This is a faster
+ alternative to <code>CCACHE_COMPILERCHECK=<command></code> if the command’s output can
+ be precalculated by the build system.
+</p>
+</li>
+<li>
+<p>
+Add support for caching code coverage results (compiling for gcov).
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_13">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Made hash of cached result created with and without <code>CCACHE_CPP2</code> different.
+ This makes it possible to rebuild with <code>CCACHE_CPP2</code> set without having to
+ clear the cache to get new results.
+</p>
+</li>
+<li>
+<p>
+Don’t try to reset a non-existing stats file. This avoids “No such file or
+ directory” messages in the ccache log when the cache directory doesn’t
+ exist.
+</p>
+</li>
+<li>
+<p>
+Fixed a bug where ccache deleted clang diagnostics after compiler failures.
+</p>
+</li>
+<li>
+<p>
+Avoid performing an unnecessary copy of the object file on a cache miss.
+</p>
+</li>
+<li>
+<p>
+Bail out on too hard compiler option <code>-fmodules</code>.
+</p>
+</li>
+<li>
+<p>
+Bail out on too hard compiler option <code>-fplugin=libcc1plugin</code> (interaction
+ with GDB).
+</p>
+</li>
+<li>
+<p>
+Fixed build error when compiling ccache with recent clang versions.
+</p>
+</li>
+<li>
+<p>
+Removed signal-unsafe code from signal handler.
+</p>
+</li>
+<li>
+<p>
+Corrected logic for when to output cached stderr.
+</p>
+</li>
+<li>
+<p>
+Wipe the whole cached result on failure retrieving a cached file.
+</p>
+</li>
+<li>
+<p>
+Fixed build error when compiling ccache with recent clang versions.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2_1">ccache 3.2.1</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2014-12-10</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_14">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed regression in temporary file handling, which lead to incorrect
+ permissions for stats, manifest and ccache.conf files in the cache.
+</p>
+</li>
+<li>
+<p>
+<code>CACHEDIR.TAG</code> files are now created in the [0-9a-f] subdirectories so that
+ ccache.conf is not lost in backups.
+</p>
+</li>
+<li>
+<p>
+Made the default cache size suffix <code>G</code>, as previously documented.
+</p>
+</li>
+<li>
+<p>
+<code>-fdiagnostics-color=auto</code> is now passed to the compiler even if stderr is
+ redirected. This fixes a problem when, for instance, a configure test probes
+ if the compiler (wrapped via ccache) supports <code>-fdiagnostics-color=auto</code>.
+</p>
+</li>
+<li>
+<p>
+Added missing documentation for <code>max_files</code> and <code>max_size</code> configuration
+ options.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_2">ccache 3.2</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2014-11-17</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_6">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Added support for configuring ccache via one or several configuration files
+ instead of via environment variables. Environment variables still have
+ priority but are no longer the recommended way of customizing ccache
+ behavior. See the manual for more information.
+</p>
+</li>
+<li>
+<p>
+Added support for compiler error/warning messages with color.
+</p>
+</li>
+<li>
+<p>
+Made creation of temporary directories and cache directories smarter to avoid
+ unnecessary <code>stat</code> calls.
+</p>
+</li>
+<li>
+<p>
+Improved efficiency of the algorithm that scans for <code>__DATE_</code> and <code>__TIME__</code>
+ tokens in the hashed source code.
+</p>
+</li>
+<li>
+<p>
+Added support for several binaries (separated by space) in <code>CCACHE_PREFIX</code>.
+</p>
+</li>
+<li>
+<p>
+The <code>-c</code> option is no longer passed to the preprocessor. This fixes problems
+ with clang and Solaris’s C++ compiler.
+</p>
+</li>
+<li>
+<p>
+ccache no longer passes preprocessor options like <code>-D</code> and <code>-I</code> to the
+ compiler when compiling preprocessed output. This fixes warnings emitted by
+ clang.
+</p>
+</li>
+<li>
+<p>
+Compiler options <code>-fprofile-generate</code>, <code>-fprofile-arcs</code>, <code>-fprofile-use</code> and
+ <code>-fbranch-probabilities</code> are now handled without bailing.
+</p>
+</li>
+<li>
+<p>
+Added support for clang’s <code>--serialize-diagnostic</code> option, storing the
+ diagnostic file (<code>.dia</code>) in the cache.
+</p>
+</li>
+<li>
+<p>
+Added support for precompiled headers when using clang.
+</p>
+</li>
+<li>
+<p>
+Added support for clang <code>.pth</code> (pretokenized header) files.
+</p>
+</li>
+<li>
+<p>
+Changed the <code>-x</code> language option to use the new objective C standard for GCC
+ and clang.
+</p>
+</li>
+<li>
+<p>
+On a cache miss, ccache now instructs the compiler to create the object file
+ at the real destination and then copies the file into the cache instead of
+ the other way around. This is needed to support compiler options like
+ <code>-fprofile-arcs</code> and <code>--serialize-diagnostics</code>.
+</p>
+</li>
+<li>
+<p>
+ccache now checks that included files' ctimes aren’t too new. This check can
+ be turned off by adding <code>include_file_ctime</code> to the “ccache sloppiness”
+ setting.
+</p>
+</li>
+<li>
+<p>
+Added possibility to get cache hits based on filename, size, mtime and ctime
+ only. On other words, source code files are not even read, only stat-ed. This
+ operation mode is opt-in by adding <code>file_stat_matches</code> to the “ccache
+ sloppiness” setting.
+</p>
+</li>
+<li>
+<p>
+The filename part of options like <code>-Wp,-MDfilename</code> is no longer included in
+ the hash since the filename doesn’t have any bearing on the result.
+</p>
+</li>
+<li>
+<p>
+Added a “read-only direct” configuration setting, which is like the
+ ordinary read-only setting except that ccache will only try to retrieve
+ results from the cache using the direct mode, not the preprocessor mode.
+</p>
+</li>
+<li>
+<p>
+The display and interpretation of cache size has been changed to use SI
+ units.
+</p>
+</li>
+<li>
+<p>
+Default cache size is now 5 GB (was previously 1 GiB).
+</p>
+</li>
+<li>
+<p>
+Added configuration option to set the compression level of compressed object
+ files in the cache.
+</p>
+</li>
+<li>
+<p>
+Added support for <code>@file</code> and <code>-@file</code> arguments (reading options from a
+ file).
+</p>
+</li>
+<li>
+<p>
+<code>-Wl,</code> options are no longer included in the hash since they don’t affect
+ compilation.
+</p>
+</li>
+<li>
+<p>
+Bail out on too hard compiler option <code>-Wp,-P</code>.
+</p>
+</li>
+<li>
+<p>
+Optimized MD4 calculation code on little-endian systems.
+</p>
+</li>
+<li>
+<p>
+Various improvements and fixes on win32.
+</p>
+</li>
+<li>
+<p>
+Improved logging to the ccache log file.
+</p>
+</li>
+<li>
+<p>
+Added <code>--dump-manifest</code> command-line option for debugging purposes.
+</p>
+</li>
+<li>
+<p>
+Added <code>--with-bundled-zlib</code> configure option.
+</p>
+</li>
+<li>
+<p>
+Upgraded bundled zlib to version 1.2.8.
+</p>
+</li>
+<li>
+<p>
+Improved <code>dev.mk</code> to be more platform independent.
+</p>
+</li>
+<li>
+<p>
+Made the test suite work with clang and gcc-llvm on OS X.
+</p>
+</li>
+<li>
+<p>
+Various other improvements of the test suite.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_15">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Any previous <code>.stderr</code> is now removed from the cache when recaching.
+</p>
+</li>
+<li>
+<p>
+Fixed an issue when handling the <code>-arch</code> compiler option with an argument.
+</p>
+</li>
+<li>
+<p>
+Fixed race condition when creating the initial cache directory.
+</p>
+</li>
+<li>
+<p>
+Fixed test suite failures when <code>CC</code> is a ccache-wrapped compiler.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_12">ccache 3.1.12</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2016-07-12</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_16">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed a bug where (due to ccache rewriting paths) the compiler could choose
+ incorrect include files if <code>CCACHE_BASEDIR</code> is used and the source file path
+ is absolute and is a symlink.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_11">ccache 3.1.11</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2015-03-07</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_17">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed bug which could result in false cache hits when source code contains
+ <code>'"'</code> followed by <code>" /*"</code> or <code>" //"</code> (with variations).
+</p>
+</li>
+<li>
+<p>
+Made hash of cached result created with and without <code>CCACHE_CPP2</code> different.
+ This makes it possible to rebuild with <code>CCACHE_CPP2</code> set without having to
+ clear the cache to get new results.
+</p>
+</li>
+<li>
+<p>
+Don’t try to reset a non-existing stats file. This avoids “No such file or
+ directory” messages in the ccache log when the cache directory doesn’t
+ exist.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_10">ccache 3.1.10</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2014-10-19</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_7">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Added support for the <code>-Xclang</code> compiler option.
+</p>
+</li>
+<li>
+<p>
+Improved handling of exit code of internally executed processes.
+</p>
+</li>
+<li>
+<p>
+Zero length object files in the cache are now rejected as invalid.
+</p>
+</li>
+<li>
+<p>
+Bail out on option <code>-gsplit-dwarf</code> (since it produces multiple output files).
+</p>
+</li>
+<li>
+<p>
+Compiler option <code>-fdebug-prefix-map</code> is now ignored (not part of the hash).
+ (The <code>-fdebug-prefix-map</code> option may be used in combination with
+ <code>CCACHE_BASEDIR</code> to reuse results across different directories.)
+</p>
+</li>
+<li>
+<p>
+Added note in documentation that <code>--ccache-skip</code> currently does not mean
+ “don’t hash the following option”.
+</p>
+</li>
+<li>
+<p>
+To enable support for precompiled headers (PCH), <code>CCACHE_SLOPPINESS</code> now also
+ needs to include the new <code>pch_defines</code> sloppiness. This is because ccache
+ can’t detect changes in the source code when only defined macros have been
+ changed.
+</p>
+</li>
+<li>
+<p>
+Stale files in the internal temporary directory (<code><ccache_dir>/tmp</code>) are now
+ cleaned up if they are older than one hour.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_18">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed path canonicalization in <code>make_relative_path()</code> when path doesn’t
+ exist.
+</p>
+</li>
+<li>
+<p>
+Fixed bug in <code>common_dir_prefix_length()</code>. This corrects the <code>CCACHE_BASEDIR</code>
+ behavior.
+</p>
+</li>
+<li>
+<p>
+ccache no longer tries to create the cache directory when <code>CCACHE_DISABLE</code> is
+ set.
+</p>
+</li>
+<li>
+<p>
+Fixed bug when reading manifests with a very large number of file info
+ entries.
+</p>
+</li>
+<li>
+<p>
+Fixed problem with logging of current working directory.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_9">ccache 3.1.9</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2013-01-06</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_19">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+The EAGAIN signal is now handled correctly when emitting cached stderr
+ output. This fixes a problem triggered by large error outputs from the
+ compiler.
+</p>
+</li>
+<li>
+<p>
+Subdirectories in the cache are no longer created in read-only mode.
+</p>
+</li>
+<li>
+<p>
+Fixed so that ccache’s log file descriptor is not made available to the
+ compiler.
+</p>
+</li>
+<li>
+<p>
+Improved error reporting when failing to create temporary stdout/stderr files
+ when executing the compiler.
+</p>
+</li>
+<li>
+<p>
+Disappearing temporary stdout/stderr files are now handled gracefully.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_other">Other</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed test suite to work on ecryptfs.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_8">ccache 3.1.8</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2012-08-11</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_8">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Made paths to dependency files relative in order to increase cache hits.
+</p>
+</li>
+<li>
+<p>
+Added work-around to make ccache work with buggy GCC 4.1 when creating a
+ pre-compiled header.
+</p>
+</li>
+<li>
+<p>
+Clang plugins are now hashed to catch plugin upgrades.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_20">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Fixed crash when the current working directory has been removed.
+</p>
+</li>
+<li>
+<p>
+Fixed crash when stderr is closed.
+</p>
+</li>
+<li>
+<p>
+Corrected a corner case when parsing backslash escapes in string
+ literals.
+</p>
+</li>
+<li>
+<p>
+Paths are now correctly canonicalized when computing paths relative to the
+ base directory.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_other_2">Other</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Made git version macro work when compiling outside of the source directory.
+</p>
+</li>
+<li>
+<p>
+Fixed <code>static_assert</code> macro definition clash with GCC 4.7.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_7">ccache 3.1.7</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2012-01-08</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_21">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Non-writable <code>CCACHE_DIR</code> is now handled gracefully when <code>CCACHE_READONLY</code> is
+ set.
+</p>
+</li>
+<li>
+<p>
+Made failure to create files (typically due to bad directory permissions) in
+ the cache directory fatal. Previously, such failures were silently and
+ erroneously flagged as "compiler produced stdout".
+</p>
+</li>
+<li>
+<p>
+Both the <code>-specs=file</code> and <code>--specs=file</code> forms are now recognized.
+</p>
+</li>
+<li>
+<p>
+Added recognition and hashing of GCC plugins specified with <code>-fplugin=file</code>.
+</p>
+</li>
+<li>
+<p>
+<code>CCACHE_COMPILERCHECK</code> now also determines how to hash explicit specs files
+ (<code>-specs=file</code>).
+</p>
+</li>
+<li>
+<p>
+Added <code>CPATH</code>, <code>C_INCLUDE_PATH</code> and similar environment variables to the hash
+ to avoid false cache hits when such variables have changed.
+</p>
+</li>
+<li>
+<p>
+Corrected log message when unify mode is enabled.
+</p>
+</li>
+<li>
+<p>
+Reverted the GCC bug compatibility introduced in ccache 3.1.5 for <code>-MT</code>/<code>-MQ</code>
+ options with concatenated arguments. (The bug is fixed in recent GCC
+ versions.)
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_other_3">Other</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Corrected license header for <code>mdfour.c</code>.
+</p>
+</li>
+<li>
+<p>
+Improved documentation on how to fix bad object files in the cache.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_6">ccache 3.1.6</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2011-08-21</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_9">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Rewrite argument to <code>--sysroot</code> if <code>CCACHE_BASEDIR</code> is used.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_22">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Don’t crash if <code>getcwd()</code> fails.
+</p>
+</li>
+<li>
+<p>
+Fixed alignment of “called for preprocessing” counter.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_5">ccache 3.1.5</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2011-05-29</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_10">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Added a new statistics counter named “called for preprocessing”.
+</p>
+</li>
+<li>
+<p>
+The original command line is now logged to the file specified with
+ <code>CCACHE_LOGFILE</code>.
+</p>
+</li>
+<li>
+<p>
+Improved error logging when system calls fail.
+</p>
+</li>
+<li>
+<p>
+Added support for rewriting absolute paths in <code>-F</code>/<code>-iframework</code> GCC
+ options.
+</p>
+</li>
+<li>
+<p>
+Improved order of statistics counters in <code>ccache -s</code> output.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_23">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+The <code>-MF</code>/<code>-MT</code>/<code>-MQ</code> options with concatenated argument are now handled
+ correctly when they are last on the command line.
+</p>
+</li>
+<li>
+<p>
+ccache is now bug compatible with GCC for the <code>-MT</code>/<code>-MQ</code> options with
+ concatenated arguments.
+</p>
+</li>
+<li>
+<p>
+Fixed a minor memory leak.
+</p>
+</li>
+<li>
+<p>
+Systems that lack (and don’t need to be linked with) libm are now supported.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_4">ccache 3.1.4</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2011-01-09</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_24">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Made a work-around for a bug in <code>gzputc()</code> in zlib 1.2.5.
+</p>
+</li>
+<li>
+<p>
+Corrupt manifest files are now removed so that they won’t block direct mode
+ hits.
+</p>
+</li>
+<li>
+<p>
+ccache now copes with file systems that don’t know about symbolic links.
+</p>
+</li>
+<li>
+<p>
+The file handle in now correctly closed on write error when trying to create
+ a cache dir tag.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_3">ccache 3.1.3</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2010-11-28</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_25">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+The -MFarg, -MTarg and -MQarg compiler options (i.e, without space between
+ option and argument) are now handled correctly.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_other_4">Other</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Portability fixes for HP-UX 11.00 and other esoteric systems.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_2">ccache 3.1.2</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2010-11-21</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_26">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Bail out on too hard compiler options <code>-fdump-*</code>.
+</p>
+</li>
+<li>
+<p>
+NULL return values from malloc/calloc of zero bytes are now handled
+ correctly.
+</p>
+</li>
+<li>
+<p>
+Fixed issue when parsing precompiler output on AIX.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_other_5">Other</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Improved documentation on which information is included in the hash sum.
+</p>
+</li>
+<li>
+<p>
+Made the “too new header file” test case work on file systems with
+ unsynchronized clocks.
+</p>
+</li>
+<li>
+<p>
+The test suite now also works on systems that lack a /dev/zero.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1_1">ccache 3.1.1</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2010-11-07</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_27">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+ccache now falls back to preprocessor mode when a non-regular include file
+ (device, socket, etc) has been detected so that potential hanging due to
+ blocking reads is avoided.
+</p>
+</li>
+<li>
+<p>
+CRC errors are now detected when decompressing compressed files in the cache.
+</p>
+</li>
+<li>
+<p>
+Fixed potential object file corruption race on NFS.
+</p>
+</li>
+<li>
+<p>
+Minor documentation corrections.
+</p>
+</li>
+<li>
+<p>
+Fixed configure detection of ar.
+</p>
+</li>
+<li>
+<p>
+ccache development version (set by dev.mk) now works with gits whose
+ <code>describe</code> command doesn’t understand <code>--dirty</code>.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_other_6">Other</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Minor debug log message improvements.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_1">ccache 3.1</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2010-09-16</p></div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_11">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Added support for hashing the output of a custom command (e.g. <code>%compiler%
+ --version</code>) to identify the compiler instead of stat-ing or hashing the
+ compiler binary. This can improve robustness when the compiler (as seen by
+ ccache) actually isn’t the real compiler but another compiler wrapper.
+</p>
+</li>
+<li>
+<p>
+Added support for caching compilations that use precompiled headers. (See the
+ manual for important instructions regarding this.)
+</p>
+</li>
+<li>
+<p>
+Locking of the files containing statistics counters is now done using
+ symlinks instead of POSIX locks. This should make ccache behave a lot better
+ on file systems where POSIX locks are slow or broken (e.g. NFS on some
+ systems).
+</p>
+</li>
+<li>
+<p>
+Manifest files are now updated without the need of taking locks.
+</p>
+</li>
+<li>
+<p>
+Updates of statistics counters are now always done in one of the sub-level
+ statistics files. This reduces lock contention, which especially improves
+ performance on slow NFS mounts.
+</p>
+</li>
+<li>
+<p>
+Reading and writing of statistics counters has been made forward-compatible
+ (unknown counters are retained).
+</p>
+</li>
+<li>
+<p>
+Files are now read without using <code>mmap()</code>. This has two benefits: it’s more
+ robust against file changes during reading and it improves performance on
+ poor systems where <code>mmap()</code> doesn’t use the disk cache.
+</p>
+</li>
+<li>
+<p>
+Added <code>.cp</code> and <code>.CP</code> as known C++ suffixes.
+</p>
+</li>
+<li>
+<p>
+Improved logging.
+</p>
+</li>
+<li>
+<p>
+Added <code>-install_name</code> as an option known to take an argument. (This improves
+ statistics when using the Darwin linker.)
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_28">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Non-fatal error messages are now never printed to stderr but logged instead.
+</p>
+</li>
+<li>
+<p>
+Fixed a bug affecting failing commands when <code>--ccache-skip</code> is used.
+</p>
+</li>
+<li>
+<p>
+Made <code>--ccache-skip</code> work for all options.
+</p>
+</li>
+<li>
+<p>
+EINTR is now handled correctly.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_other_7">Other</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Work on porting ccache to win32 (native), mostly done by Ramiro Polla. The
+ port is not yet finished, but will hopefully be complete in some subsequent
+ release.
+</p>
+</li>
+<li>
+<p>
+Added a <code>--nostats</code> flag to the performance benchmark program.
+</p>
+</li>
+<li>
+<p>
+Made the performance benchmark program more accurate when measuring cache
+ hits.
+</p>
+</li>
+<li>
+<p>
+Added a new test framework for unit tests written in C.
+</p>
+</li>
+<li>
+<p>
+Got rid of <code>configure-dev</code>; dev mode is now given by <code>dev.mk.in</code> presence.
+</p>
+</li>
+<li>
+<p>
+Improved documentation on how to combine ccache with other compiler wrappers
+ (like <code>distcc</code>).
+</p>
+</li>
+<li>
+<p>
+New <code>LICENSE.txt</code> file with licensing and copyright details about bundled
+ source code.
+</p>
+</li>
+<li>
+<p>
+New <code>AUTHORS.txt</code> file with a list of ccache contributors.
+</p>
+</li>
+<li>
+<p>
+New <code>HACKING.txt</code> file with some notes about ccache code conventions.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_0_1">ccache 3.0.1</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2010-07-15</p></div>
+<div class="sect2">
+<h3 id="_bug_fixes_29">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+The statistics counter “called for link” is now correctly updated when
+ linking with a single object file.
+</p>
+</li>
+<li>
+<p>
+Fixed a problem with out-of-source builds.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_ccache_3_0">ccache 3.0</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Release date: 2010-06-20</p></div>
+<div class="sect2">
+<h3 id="_general">General</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+ccache is now licensed under the GNU General Public License (GPL) version 3
+ or later.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_upgrade_notes">Upgrade notes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+The way the hashes are calculated has changed, so you won’t get cache hits
+ for compilation results stored by older ccache versions. Because of this, you
+ might as well clear the old cache directory with <code>ccache --clear</code> if you
+ want, unless you plan to keep using an older ccache version.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_new_features_and_improvements_12">New features and improvements</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+ccache now has a “direct mode” where it computes a hash of the source code
+ (including all included files) and compiler options without running the
+ preprocessor. By not running the preprocessor, CPU usage is reduced; the
+ speed is somewhere between 1 and 5 times that of ccache running in
+ traditional mode, depending on the circumstances. The speedup will be higher
+ when I/O is fast (e.g., when files are in the disk cache). The direct mode
+ can be disabled by setting <code>CCACHE_NODIRECT</code>.
+</p>
+</li>
+<li>
+<p>
+Support has been added for rewriting absolute paths to relative paths when
+ hashing, in order to increase cache hit rate when building the same source
+ code in different directories even when compiling with <code>-g</code> and when using
+ absolute include directory paths. This is done by setting the
+ <code>CCACHE_BASEDIR</code> environment variable to an absolute path that specifies
+ which paths to rewrite.
+</p>
+</li>
+<li>
+<p>
+Object files are now optionally stored compressed in the cache. The runtime
+ cost is negligible, and more files will fit in the ccache directory and in
+ the disk cache. Set <code>CCACHE_COMPRESS</code> to enable object file compression. Note
+ that you can’t use compression in combination with the hard link feature.
+</p>
+</li>
+<li>
+<p>
+A <code>CCACHE_COMPILERCHECK</code> option has been added. This option tells ccache what
+ compiler-identifying information to hash to ensure that results retrieved
+ from the cache are accurate. Possible values are: none (don’t hash anything),
+ mtime (hash the compiler’s mtime and size) and content (hash the content of
+ the compiler binary). The default is mtime.
+</p>
+</li>
+<li>
+<p>
+It is now possible to specify extra files whose contents should be included
+ in the hash sum by setting the <code>CCACHE_EXTRAFILES</code> option.
+</p>
+</li>
+<li>
+<p>
+Added support for Objective-C and Objective-C++. The statistics counter
+ “not a C/C++ file” has been renamed to “unsupported source language”.
+</p>
+</li>
+<li>
+<p>
+Added support for the <code>-x</code> compiler option.
+</p>
+</li>
+<li>
+<p>
+Added support for long command-line options.
+</p>
+</li>
+<li>
+<p>
+A <code>CACHEDIR.TAG</code> file is now created in the cache directory. See
+ <a href="http://www.brynosaurus.com/cachedir/">http://www.brynosaurus.com/cachedir/</a>.
+</p>
+</li>
+<li>
+<p>
+Messages printed to the debug log (specified by <code>CCACHE_LOGFILE</code>) have been
+ improved.
+</p>
+</li>
+<li>
+<p>
+You can relax some checks that ccache does in direct mode by setting
+ <code>CCACHE_SLOPPINESS</code>. See the manual for more information.
+</p>
+</li>
+<li>
+<p>
+<code>CCACHE_TEMPDIR</code> no longer needs to be on the same filesystem as
+ <code>CCACHE_DIR</code>.
+</p>
+</li>
+<li>
+<p>
+The default value of <code>CCACHE_TEMPDIR</code> has been changed to <code>$CCACHE_DIR/tmp</code>
+ to avoid cluttering the top directory.
+</p>
+</li>
+<li>
+<p>
+Temporary files that later will be moved into the cache are now created in
+ the cache directory they will end up in. This makes ccache more friendly to
+ Linux’s directory layout.
+</p>
+</li>
+<li>
+<p>
+Improved the test suite and added tests for most of the new functionality.
+ It’s now also possible to specify a subset of tests to run.
+</p>
+</li>
+<li>
+<p>
+Standard error output from the compiler is now only stored in the cache if
+ it’s non-empty.
+</p>
+</li>
+<li>
+<p>
+If the compiler produces no object file or an empty object file, but gives a
+ zero exit status (could be due to a file system problem, a buggy program
+ specified by <code>CCACHE_PREFIX</code>, etc.), ccache copes with it properly.
+</p>
+</li>
+<li>
+<p>
+Added <code>installcheck</code> and <code>distcheck</code> make targets.
+</p>
+</li>
+<li>
+<p>
+Clarified cache size limit options' and cleanup semantics.
+</p>
+</li>
+<li>
+<p>
+Improved display of cache max size values.
+</p>
+</li>
+<li>
+<p>
+The following options are no longer hashed in the preprocessor mode:
+ <code>-imacros</code>, <code>-imultilib</code>, <code>-iprefix</code>, <code>-iquote</code>, <code>-isysroot</code>, <code>-iwithprefix</code>,
+ <code>-iwithprefixbefore</code>, <code>-nostdinc</code>, <code>-nostdinc++</code> and <code>-U</code>.
+</p>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_bug_fixes_30">Bug fixes</h3>
+<div class="ulist"><ul>
+<li>
+<p>
+Various portability improvements.
+</p>
+</li>
+<li>
+<p>
+Improved detection of home directory.
+</p>
+</li>
+<li>
+<p>
+User-defined <code>CPPFLAGS</code> and <code>LDFLAGS</code> are now respected in the Makefile.
+</p>
+</li>
+<li>
+<p>
+Fixed NFS issues.
+</p>
+</li>
+<li>
+<p>
+Computation of the hash sum has been improved to decrease the risk of hash
+ collisions. For instance, the compiler options <code>-X -Y</code> and <code>-X-Y</code> previously
+ contributed equally to the hash sum.
+</p>
+</li>
+<li>
+<p>
+Bail out on too hard compiler options <code>--coverage</code>, <code>-fprofile-arcs</code>,
+ <code>-fprofile-generate</code>, <code>-fprofile-use</code>, <code>-frepo</code>, <code>-ftest-coverage</code> and
+ <code>-save-temps</code>. Also bail out on <code>@file</code> style options.
+</p>
+</li>
+<li>
+<p>
+Errors when using multiple <code>-arch</code> compiler options are now noted as
+ “unsupported compiler option”.
+</p>
+</li>
+<li>
+<p>
+<code>-MD</code>/<code>-MMD</code> options without <code>-MT</code>/<code>-MF</code> are now handled correctly.
+</p>
+</li>
+<li>
+<p>
+The <code>-finput-charset</code> option is now handled correctly.
+</p>
+</li>
+<li>
+<p>
+Added support for <code>-Wp,-MD</code> and <code>-Wp,-MMD</code> options.
+</p>
+</li>
+<li>
+<p>
+The compiler options <code>-Xassembler</code>, <code>-b</code>, <code>-G</code> and <code>-V</code> are now correctly
+ recognized as taking an argument.
+</p>
+</li>
+<li>
+<p>
+Debug information containing line numbers of predefined and command-line
+ macros (enabled with the compiler option <code>-g3</code>) will now be correct.
+</p>
+</li>
+<li>
+<p>
+Corrected LRU cleanup handling of object files.
+</p>
+</li>
+<li>
+<p>
+<code>utimes()</code> is now used instead of <code>utime()</code> when available.
+</p>
+</li>
+<li>
+<p>
+Non-writable cache directories are now handled gracefully.
+</p>
+</li>
+<li>
+<p>
+Corrected documentation about sharing the cache directory.
+</p>
+</li>
+<li>
+<p>
+Fixed compilation warnings from GCC 4.3.
+</p>
+</li>
+<li>
+<p>
+The command specified by <code>CCACHE_PREFIX</code> is no longer part of the hash.
+</p>
+</li>
+<li>
+<p>
+Fixed bad memory access spotted by Valgrind.
+</p>
+</li>
+<li>
+<p>
+Fixed a bug in <code>x_realloc</code>.
+</p>
+</li>
+<li>
+<p>
+Freed memory is no longer referenced when compiling a <code>.i</code>/<code>.ii</code> file and
+ falling back to running the real compiler.
+</p>
+</li>
+<li>
+<p>
+The test suite is now immune to external values of the <code>CCACHE_*</code> environment
+ variables.
+</p>
+</li>
+<li>
+<p>
+Improved detection of recursive invocation.
+</p>
+</li>
+<li>
+<p>
+The ccache binary is now not unconditionally stripped when installing.
+</p>
+</li>
+<li>
+<p>
+Statistics counters are now correctly updated for -E option failures and
+ internal errors.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+Version 3.3.4<br />
+Last updated
+ 2017-02-17 22:28:35 CET
+</div>
+</div>
+</body>
+</html>
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