1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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2 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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3 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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5 <meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
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6 <meta name="generator" content="AsciiDoc 8.6.9" />
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7 <title>ccache news</title>
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8 <style type="text/css">
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9 /* Shared CSS for AsciiDoc xhtml11 and html5 backends */
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13 font-family: Georgia,serif;
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17 h1, h2, h3, h4, h5, h6,
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18 div.title, caption.title,
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19 thead, p.table.header,
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21 #author, #revnumber, #revdate, #revremark,
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27 margin: 1em 5% 1em 5%;
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32 text-decoration: underline;
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48 h1, h2, h3, h4, h5, h6 {
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51 margin-bottom: 0.5em;
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56 border-bottom: 2px solid silver;
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76 border: 1px solid silver;
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81 margin-bottom: 0.5em;
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90 .monospaced, code, pre {
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98 white-space: pre-wrap;
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108 #revnumber, #revdate, #revremark {
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114 padding-top: 0.5em;
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119 padding-bottom: 0.5em;
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123 padding-bottom: 0.5em;
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128 margin-bottom: 1.5em;
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130 div.imageblock, div.exampleblock, div.verseblock,
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131 div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock,
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132 div.admonitionblock {
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148 div.title, caption.title {
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153 margin-bottom: 0.5em;
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159 td div.title:first-child {
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162 div.content div.title:first-child {
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165 div.content + div.title {
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169 div.sidebarblock > div.content {
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170 background: #ffffee;
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171 border: 1px solid #dddddd;
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176 div.listingblock > div.content {
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177 border: 1px solid #dddddd;
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178 border-left: 5px solid #f0f0f0;
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179 background: #f8f8f8;
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183 div.quoteblock, div.verseblock {
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184 padding-left: 1.0em;
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185 margin-left: 1.0em;
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187 border-left: 5px solid #f0f0f0;
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191 div.quoteblock > div.attribution {
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192 padding-top: 0.5em;
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196 div.verseblock > pre.content {
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197 font-family: inherit;
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198 font-size: inherit;
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200 div.verseblock > div.attribution {
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201 padding-top: 0.75em;
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204 /* DEPRECATED: Pre version 8.2.7 verse style literal block. */
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205 div.verseblock + div.attribution {
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209 div.admonitionblock .icon {
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210 vertical-align: top;
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213 text-decoration: underline;
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215 padding-right: 0.5em;
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217 div.admonitionblock td.content {
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218 padding-left: 0.5em;
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219 border-left: 3px solid #dddddd;
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222 div.exampleblock > div.content {
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223 border-left: 3px solid #dddddd;
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224 padding-left: 0.5em;
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227 div.imageblock div.content { padding-left: 0; }
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229 a.image:visited { color: white; }
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233 margin-bottom: 0.8em;
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238 font-style: normal;
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241 dd > *:first-child {
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246 list-style-position: outside;
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249 list-style-type: decimal;
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252 list-style-type: lower-alpha;
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255 list-style-type: upper-alpha;
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258 list-style-type: lower-roman;
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261 list-style-type: upper-roman;
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264 div.compact ul, div.compact ol,
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265 div.compact p, div.compact p,
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266 div.compact div, div.compact div {
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268 margin-bottom: 0.1em;
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280 margin-bottom: 0.8em;
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303 background: yellow;
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306 .footnote, .footnoteref {
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310 span.footnote, span.footnoteref {
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311 vertical-align: super;
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315 margin: 20px 0 20px 0;
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316 padding: 7px 0 0 0;
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319 #footnotes div.footnote {
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334 padding-right: 0.5em;
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336 vertical-align: top;
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343 #footer-badges { display: none; }
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385 span.purple { color: purple; }
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388 span.teal { color: teal; }
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389 span.white { color: white; }
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390 span.yellow { color: yellow; }
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393 span.black-background { background: black; }
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396 span.gray-background { background: gray; }
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397 span.green-background { background: green; }
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398 span.lime-background { background: lime; }
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399 span.maroon-background { background: maroon; }
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416 div.unbreakable { page-break-inside: avoid; }
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426 margin-bottom: 1.5em;
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428 div.tableblock > table {
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429 border: 3px solid #527bbd;
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431 thead, p.table.header {
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438 /* Because the table frame attribute is overriden by CSS in most browsers. */
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521 padding-top: 0.5em;
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523 border-top: 2px solid silver;
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524 border-bottom: 2px solid silver;
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527 border-style: none;
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529 body.manpage div.sectionbody {
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534 body.manpage div#toc { display: none; }
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539 <script type="text/javascript">
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541 var asciidoc = { // Namespace.
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543 /////////////////////////////////////////////////////////////////////
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544 // Table Of Contents generator
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545 /////////////////////////////////////////////////////////////////////
\r
547 /* Author: Mihai Bazon, September 2002
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548 * http://students.infoiasi.ro/~mishoo
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550 * Table Of Content generator
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553 * Feel free to use this script under the terms of the GNU General Public
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554 * License, as long as you do not remove or alter this notice.
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557 /* modified by Troy D. Hanson, September 2006. License: GPL */
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558 /* modified by Stuart Rackham, 2006, 2009. License: GPL */
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560 // toclevels = 1..4.
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561 toc: function (toclevels) {
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563 function getText(el) {
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565 for (var i = el.firstChild; i != null; i = i.nextSibling) {
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566 if (i.nodeType == 3 /* Node.TEXT_NODE */) // IE doesn't speak constants.
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568 else if (i.firstChild != null)
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569 text += getText(i);
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574 function TocEntry(el, text, toclevel) {
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577 this.toclevel = toclevel;
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580 function tocEntries(el, toclevels) {
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581 var result = new Array;
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582 var re = new RegExp('[hH]([1-'+(toclevels+1)+'])');
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583 // Function that scans the DOM tree for header elements (the DOM2
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584 // nodeIterator API would be a better technique but not supported by all
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586 var iterate = function (el) {
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587 for (var i = el.firstChild; i != null; i = i.nextSibling) {
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588 if (i.nodeType == 1 /* Node.ELEMENT_NODE */) {
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589 var mo = re.exec(i.tagName);
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590 if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") {
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591 result[result.length] = new TocEntry(i, getText(i), mo[1]-1);
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601 var toc = document.getElementById("toc");
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606 // Delete existing TOC entries in case we're reloading the TOC.
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607 var tocEntriesToRemove = [];
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609 for (i = 0; i < toc.childNodes.length; i++) {
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610 var entry = toc.childNodes[i];
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611 if (entry.nodeName.toLowerCase() == 'div'
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612 && entry.getAttribute("class")
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613 && entry.getAttribute("class").match(/^toclevel/))
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614 tocEntriesToRemove.push(entry);
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616 for (i = 0; i < tocEntriesToRemove.length; i++) {
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617 toc.removeChild(tocEntriesToRemove[i]);
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620 // Rebuild TOC entries.
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621 var entries = tocEntries(document.getElementById("content"), toclevels);
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622 for (var i = 0; i < entries.length; ++i) {
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623 var entry = entries[i];
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624 if (entry.element.id == "")
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625 entry.element.id = "_toc_" + i;
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626 var a = document.createElement("a");
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627 a.href = "#" + entry.element.id;
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628 a.appendChild(document.createTextNode(entry.text));
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629 var div = document.createElement("div");
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630 div.appendChild(a);
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631 div.className = "toclevel" + entry.toclevel;
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632 toc.appendChild(div);
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634 if (entries.length == 0)
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635 toc.parentNode.removeChild(toc);
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639 /////////////////////////////////////////////////////////////////////
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640 // Footnotes generator
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641 /////////////////////////////////////////////////////////////////////
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643 /* Based on footnote generation code from:
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644 * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html
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647 footnotes: function () {
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648 // Delete existing footnote entries in case we're reloading the footnodes.
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650 var noteholder = document.getElementById("footnotes");
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654 var entriesToRemove = [];
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655 for (i = 0; i < noteholder.childNodes.length; i++) {
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656 var entry = noteholder.childNodes[i];
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657 if (entry.nodeName.toLowerCase() == 'div' && entry.getAttribute("class") == "footnote")
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658 entriesToRemove.push(entry);
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660 for (i = 0; i < entriesToRemove.length; i++) {
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661 noteholder.removeChild(entriesToRemove[i]);
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664 // Rebuild footnote entries.
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665 var cont = document.getElementById("content");
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666 var spans = cont.getElementsByTagName("span");
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669 for (i=0; i<spans.length; i++) {
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670 if (spans[i].className == "footnote") {
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672 var note = spans[i].getAttribute("data-note");
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674 // Use [\s\S] in place of . so multi-line matches work.
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675 // Because JavaScript has no s (dotall) regex flag.
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676 note = spans[i].innerHTML.match(/\s*\[([\s\S]*)]\s*/)[1];
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677 spans[i].innerHTML =
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678 "[<a id='_footnoteref_" + n + "' href='#_footnote_" + n +
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679 "' title='View footnote' class='footnote'>" + n + "</a>]";
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680 spans[i].setAttribute("data-note", note);
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682 noteholder.innerHTML +=
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683 "<div class='footnote' id='_footnote_" + n + "'>" +
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684 "<a href='#_footnoteref_" + n + "' title='Return to text'>" +
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685 n + "</a>. " + note + "</div>";
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686 var id =spans[i].getAttribute("id");
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687 if (id != null) refs["#"+id] = n;
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691 noteholder.parentNode.removeChild(noteholder);
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693 // Process footnoterefs.
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694 for (i=0; i<spans.length; i++) {
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695 if (spans[i].className == "footnoteref") {
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696 var href = spans[i].getElementsByTagName("a")[0].getAttribute("href");
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697 href = href.match(/#.*/)[0]; // Because IE return full URL.
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699 spans[i].innerHTML =
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700 "[<a href='#_footnote_" + n +
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701 "' title='View footnote' class='footnote'>" + n + "</a>]";
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707 install: function(toclevels) {
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710 function reinstall() {
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711 asciidoc.footnotes();
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713 asciidoc.toc(toclevels);
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717 function reinstallAndRemoveTimer() {
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718 clearInterval(timerId);
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722 timerId = setInterval(reinstall, 500);
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723 if (document.addEventListener)
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724 document.addEventListener("DOMContentLoaded", reinstallAndRemoveTimer, false);
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726 window.onload = reinstallAndRemoveTimer;
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730 asciidoc.install(2);
\r
734 <body class="article">
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736 <h1>ccache news</h1>
\r
737 <span id="revnumber">version 3.3.2</span>
\r
739 <div id="toctitle">Table of Contents</div>
740 <noscript><p><b>JavaScript must be enabled in your browser to display the table of contents.</b></p></noscript>
744 <div class="sect1">
\r
745 <h2 id="_ccache_3_3_2">ccache 3.3.2</h2>
\r
746 <div class="sectionbody">
\r
747 <div class="paragraph"><p>Release date: 2016-09-28</p></div>
\r
748 <div class="sect2">
\r
749 <h3 id="_bug_fixes">Bug fixes</h3>
\r
750 <div class="ulist"><ul>
\r
753 Fixed a regression in ccache 3.3 related to potentially bad content of
\r
754 dependency files when compiling identical source code but with different
\r
760 Fixed a regression in ccache 3.3.1: ccache could get confused when using the
\r
761 compiler option <code>-Wp,</code> to pass multiple options to the preprocessor,
\r
762 resulting in missing dependency files from direct mode cache hits.
\r
769 <div class="sect1">
\r
770 <h2 id="_ccache_3_3_1">ccache 3.3.1</h2>
\r
771 <div class="sectionbody">
\r
772 <div class="paragraph"><p>Release date: 2016-09-07</p></div>
\r
773 <div class="sect2">
\r
774 <h3 id="_bug_fixes_2">Bug fixes</h3>
\r
775 <div class="ulist"><ul>
\r
778 Fixed a problem in the “multiple <code>-arch</code> options” support introduced in
\r
779 3.3. When using the direct mode (the default), different combinations of
\r
780 <code>-arch</code> options were not detected properly.
\r
785 Fixed an issue when compiler option <code>-Wp,-MT,path</code> is used instead of <code>-MT
\r
786 path</code> (and similar for <code>-MF</code>, <code>-MP</code> and <code>-MQ</code>) and <code>run_second_cpp</code>
\r
787 (<code>CCACHE_CPP2</code>) is enabled.
\r
794 <div class="sect1">
\r
795 <h2 id="_ccache_3_3">ccache 3.3</h2>
\r
796 <div class="sectionbody">
\r
797 <div class="paragraph"><p>Release date: 2016-08-27</p></div>
\r
798 <div class="sect2">
\r
799 <h3 id="_notes">Notes</h3>
\r
800 <div class="ulist"><ul>
\r
803 A C99-compatible compiler is now required to build ccache.
\r
808 <div class="sect2">
\r
809 <h3 id="_new_features_and_improvements">New features and improvements</h3>
\r
810 <div class="ulist"><ul>
\r
813 The configuration option <code>run_second_cpp</code> (<code>CCACHE_CPP2</code>) now defaults to
\r
814 true. This improves ccache’s out-of-the-box experience for compilers that
\r
815 can’t compile their own preprocessed output with the same outcome as if they
\r
816 compiled the real source code directly, e.g. newer versions of GCC and Clang.
\r
821 The configuration option <code>hash_dir</code> (<code>CCACHE_HASHDIR</code>) now defaults to true.
\r
826 Added a new <code>ignore_headers_in_manifest</code> configuration option, which
\r
827 specifies headers that should be ignored in the direct mode.
\r
832 Added a new <code>prefix_command_cpp</code> (<code>CCACHE_PREFIX_CPP</code>) configuration option,
\r
833 which specifies one or several prefixes to add to the command line ccache
\r
834 uses when invoking the preprocessor.
\r
839 Added a new <code>limit_multiple</code> (<code>CCACHE_LIMIT_MULTIPLE</code>) configuration option,
\r
840 which specifies how much of the cache to remove when cleaning.
\r
845 Added a new <code>keep_comments_cpp</code> (<code>CCACHE_COMMENTS</code>) configuration option,
\r
846 which tells ccache not to discard the comments before hashing preprocessor
\r
847 output. This can be used to check documentation with <strong>-Wdocumentation</strong>.
\r
852 Added a new sloppiness option <code>no_system_headers</code>, which tells ccache not to
\r
853 include system headers in manifest files.
\r
858 Added a new statistics counter that tracks the number of performed cleanups
\r
859 due to the cache size being over the limit. The value is shown in the output
\r
860 of “ccache -s”.
\r
865 Added support for relocating debug info directory using <code>-fdebug-prefix-map</code>.
\r
866 This allows for cache hits even when <code>hash_dir</code> is used in combination with
\r
867 <code>base_dir</code>.
\r
872 Added a new “cache hit rate” field to the output of “ccache -s”.
\r
877 Added support for caching compilation of assembler code produced by e.g.
\r
878 “gcc -S file.c”.
\r
883 Added support for cuda including the -optf/--options-file option.
\r
888 Added support for Fortran 77.
\r
893 Added support for multiple <code>-arch</code> options to produce "fat binaries".
\r
898 Multiple identical <code>-arch</code> arguments are now handled without bailing.
\r
903 The concatenated form of some long compiler options is now recognized, for
\r
904 example when using <code>-isystemPATH</code> instead of <code>-isystem PATH</code>.
\r
909 If hard-linking is enabled and but fails (e.g. due to cross-device linking),
\r
910 ccache now falls back to copying instead of running the compiler.
\r
915 Made the <code>hash_dir</code> option only have effect when generating debug info.
\r
920 ccache now knows how to convert absolute paths to relative paths inside
\r
921 dependency files when using <code>base_dir</code>.
\r
926 Improved parsing of <code>-g*</code> options.
\r
931 Made ccache understand <code>-Wp,-D*</code> options.
\r
936 ccache now understands the undocumented <code>-coverage</code> (only one dash) GCC
\r
942 Names of included files are no longer included in the hash of the compiler’s
\r
943 preprocessed output. This leads to more potential cache hits when not using
\r
949 Increased buffer size used when reading file data. This improves performance
\r
955 <div class="sect2">
\r
956 <h3 id="_bug_fixes_3">Bug fixes</h3>
\r
957 <div class="ulist"><ul>
\r
960 Bail out on too hard compiler option <code>-P</code>.
\r
965 Fixed clang test suite when running on Linux.
\r
970 Fixed build and test for MinGW32 and Windows.
\r
977 <div class="sect1">
\r
978 <h2 id="_ccache_3_2_9">ccache 3.2.9</h2>
\r
979 <div class="sectionbody">
\r
980 <div class="paragraph"><p>Release date: 2016-09-28</p></div>
\r
981 <div class="sect2">
\r
982 <h3 id="_bug_fixes_4">Bug fixes</h3>
\r
983 <div class="ulist"><ul>
\r
986 Fixed a regression in ccache 3.2.8: ccache could get confused when using the
\r
987 compiler option <code>-Wp,</code> to pass multiple options to the preprocessor,
\r
988 resulting in missing dependency files from direct mode cache hits.
\r
995 <div class="sect1">
\r
996 <h2 id="_ccache_3_2_8">ccache 3.2.8</h2>
\r
997 <div class="sectionbody">
\r
998 <div class="paragraph"><p>Release date: 2016-09-07</p></div>
\r
999 <div class="sect2">
\r
1000 <h3 id="_bug_fixes_5">Bug fixes</h3>
\r
1001 <div class="ulist"><ul>
\r
1004 Fixed an issue when compiler option <code>-Wp,-MT,path</code> is used instead of <code>-MT
\r
1005 path</code> (and similar for <code>-MF</code>, <code>-MP</code> and <code>-MQ</code>) and <code>run_second_cpp</code>
\r
1006 (<code>CCACHE_CPP2</code>) is enabled.
\r
1011 ccache now understands the undocumented <code>-coverage</code> (only one dash) GCC
\r
1019 <div class="sect1">
\r
1020 <h2 id="_ccache_3_2_7">ccache 3.2.7</h2>
\r
1021 <div class="sectionbody">
\r
1022 <div class="paragraph"><p>Release date: 2016-07-20</p></div>
\r
1023 <div class="sect2">
\r
1024 <h3 id="_bug_fixes_6">Bug fixes</h3>
\r
1025 <div class="ulist"><ul>
\r
1028 Fixed a bug which could lead to false cache hits for compiler command lines
\r
1029 with a missing argument to an option that takes an argument.
\r
1034 ccache now knows how to work around a glitch in the output of GCC 6’s
\r
1042 <div class="sect1">
\r
1043 <h2 id="_ccache_3_2_6">ccache 3.2.6</h2>
\r
1044 <div class="sectionbody">
\r
1045 <div class="paragraph"><p>Release date: 2016-07-12</p></div>
\r
1046 <div class="sect2">
\r
1047 <h3 id="_bug_fixes_7">Bug fixes</h3>
\r
1048 <div class="ulist"><ul>
\r
1051 Fixed build problem on QNX, which lacks “SA_RESTART”.
\r
1056 Bail out on compiler option <code>-fstack-usage</code> since it creates a <code>.su</code> file
\r
1057 which ccache currently doesn’t handle.
\r
1062 Fixed a bug where (due to ccache rewriting paths) the compiler could choose
\r
1063 incorrect include files if <code>CCACHE_BASEDIR</code> is used and the source file path
\r
1064 is absolute and is a symlink.
\r
1071 <div class="sect1">
\r
1072 <h2 id="_ccache_3_2_5">ccache 3.2.5</h2>
\r
1073 <div class="sectionbody">
\r
1074 <div class="paragraph"><p>Release date: 2016-04-17</p></div>
\r
1075 <div class="sect2">
\r
1076 <h3 id="_new_features_and_improvements_2">New features and improvements</h3>
\r
1077 <div class="ulist"><ul>
\r
1080 Only pass clang-specific <code>-stdlib=</code> to the preprocessor.
\r
1085 Improved handling of stale NFS handles.
\r
1090 Made it harder to misinterpret documentation of boolean environment settings'
\r
1096 <div class="sect2">
\r
1097 <h3 id="_bug_fixes_8">Bug fixes</h3>
\r
1098 <div class="ulist"><ul>
\r
1101 Include m4 files used by configure.ac in the source dist archives.
\r
1106 Corrected "Performance" section in the manual regarding <code>__DATE_</code>, <code>__TIME__</code>
\r
1107 and <code>__FILE__</code> macros.
\r
1112 Fixed build on Solaris 10+ and AIX 7.
\r
1117 Fixed failure to create directories on QNX.
\r
1122 Don’t (try to) update manifest file in “read-only” and “read-only direct”
\r
1128 Fixed a bug in caching of <code>stat</code> system calls in “file_stat_matches
\r
1129 sloppiness mode”.
\r
1134 Fixed bug in hashing of clang plugins, leading to unnecessary cache misses.
\r
1139 Fixed --print-config to show “pch_defines sloppiness”.
\r
1144 The man page is now built when running “make install” from Git repository
\r
1152 <div class="sect1">
\r
1153 <h2 id="_ccache_3_2_4">ccache 3.2.4</h2>
\r
1154 <div class="sectionbody">
\r
1155 <div class="paragraph"><p>Release date: 2015-10-08</p></div>
\r
1156 <div class="sect2">
\r
1157 <h3 id="_bug_fixes_9">Bug fixes</h3>
\r
1158 <div class="ulist"><ul>
\r
1161 Fixed build error related to zlib on systems with older make versions
\r
1162 (regression in ccache 3.2.3).
\r
1167 Made conversion-to-bool explicit to avoid build warnings (and potential
\r
1168 runtime errors) on legacy systems.
\r
1173 Improved signal handling: Kill compiler on SIGTERM; wait for compiler to exit
\r
1174 before exiting; die appropriately.
\r
1179 Minor fixes related to Windows support.
\r
1184 The correct compression level is now used if compression is requested.
\r
1189 Fixed a bug where cache cleanup could be run too early for caches larger than
\r
1190 64 GiB on 32-bit systems.
\r
1197 <div class="sect1">
\r
1198 <h2 id="_ccache_3_2_3">ccache 3.2.3</h2>
\r
1199 <div class="sectionbody">
\r
1200 <div class="paragraph"><p>Release date: 2015-08-16</p></div>
\r
1201 <div class="sect2">
\r
1202 <h3 id="_new_features_and_improvements_3">New features and improvements</h3>
\r
1203 <div class="ulist"><ul>
\r
1206 Added support for compiler option <code>-gsplit-dwarf</code>.
\r
1211 <div class="sect2">
\r
1212 <h3 id="_bug_fixes_10">Bug fixes</h3>
\r
1213 <div class="ulist"><ul>
\r
1216 Support external zlib in nonstandard directory.
\r
1221 Avoid calling <code>exit()</code> inside an exit handler.
\r
1226 Let exit handler terminate properly.
\r
1231 Bail out on compiler option <code>--save-temps</code> in addition to <code>-save-temps</code>.
\r
1236 Only log "Disabling direct mode" once when failing to read potential include
\r
1244 <div class="sect1">
\r
1245 <h2 id="_ccache_3_2_2">ccache 3.2.2</h2>
\r
1246 <div class="sectionbody">
\r
1247 <div class="paragraph"><p>Release date: 2015-05-10</p></div>
\r
1248 <div class="sect2">
\r
1249 <h3 id="_new_features_and_improvements_4">New features and improvements</h3>
\r
1250 <div class="ulist"><ul>
\r
1253 Added support for <code>CCACHE_COMPILERCHECK=string:<value></code>. This is a faster
\r
1254 alternative to <code>CCACHE_COMPILERCHECK=<command></code> if the command’s output can
\r
1255 be precalculated by the build system.
\r
1260 Add support for caching code coverage results (compiling for gcov).
\r
1265 <div class="sect2">
\r
1266 <h3 id="_bug_fixes_11">Bug fixes</h3>
\r
1267 <div class="ulist"><ul>
\r
1270 Made hash of cached result created with and without <code>CCACHE_CPP2</code> different.
\r
1271 This makes it possible to rebuild with <code>CCACHE_CPP2</code> set without having to
\r
1272 clear the cache to get new results.
\r
1277 Don’t try to reset a non-existing stats file. This avoids “No such file or
\r
1278 directory” messages in the ccache log when the cache directory doesn’t
\r
1284 Fixed a bug where ccache deleted clang diagnostics after compiler failures.
\r
1289 Avoid performing an unnecessary copy of the object file on a cache miss.
\r
1294 Bail out on too hard compiler option <code>-fmodules</code>.
\r
1299 Bail out on too hard compiler option <code>-fplugin=libcc1plugin</code> (interaction
\r
1305 Fixed build error when compiling ccache with recent clang versions.
\r
1310 Removed signal-unsafe code from signal handler.
\r
1315 Corrected logic for when to output cached stderr.
\r
1320 Wipe the whole cached result on failure retrieving a cached file.
\r
1325 Fixed build error when compiling ccache with recent clang versions.
\r
1332 <div class="sect1">
\r
1333 <h2 id="_ccache_3_2_1">ccache 3.2.1</h2>
\r
1334 <div class="sectionbody">
\r
1335 <div class="paragraph"><p>Release date: 2014-12-10</p></div>
\r
1336 <div class="sect2">
\r
1337 <h3 id="_bug_fixes_12">Bug fixes</h3>
\r
1338 <div class="ulist"><ul>
\r
1341 Fixed regression in temporary file handling, which lead to incorrect
\r
1342 permissions for stats, manifest and ccache.conf files in the cache.
\r
1347 <code>CACHEDIR.TAG</code> files are now created in the [0-9a-f] subdirectories so that
\r
1348 ccache.conf is not lost in backups.
\r
1353 Made the default cache size suffix <code>G</code>, as previously documented.
\r
1358 <code>-fdiagnostics-color=auto</code> is now passed to the compiler even if stderr is
\r
1359 redirected. This fixes a problem when, for instance, a configure test probes
\r
1360 if the compiler (wrapped via ccache) supports <code>-fdiagnostics-color=auto</code>.
\r
1365 Added missing documentation for <code>max_files</code> and <code>max_size</code> configuration
\r
1373 <div class="sect1">
\r
1374 <h2 id="_ccache_3_2">ccache 3.2</h2>
\r
1375 <div class="sectionbody">
\r
1376 <div class="paragraph"><p>Release date: 2014-11-17</p></div>
\r
1377 <div class="sect2">
\r
1378 <h3 id="_new_features_and_improvements_5">New features and improvements</h3>
\r
1379 <div class="ulist"><ul>
\r
1382 Added support for configuring ccache via one or several configuration files
\r
1383 instead of via environment variables. Environment variables still have
\r
1384 priority but are no longer the recommended way of customizing ccache
\r
1385 behavior. See the manual for more information.
\r
1390 Added support for compiler error/warning messages with color.
\r
1395 Made creation of temporary directories and cache directories smarter to avoid
\r
1396 unnecessary <code>stat</code> calls.
\r
1401 Improved efficiency of the algorithm that scans for <code>__DATE_</code> and <code>__TIME__</code>
\r
1402 tokens in the hashed source code.
\r
1407 Added support for several binaries (separated by space) in <code>CCACHE_PREFIX</code>.
\r
1412 The <code>-c</code> option is no longer passed to the preprocessor. This fixes problems
\r
1413 with clang and Solaris’s C++ compiler.
\r
1418 ccache no longer passes preprocessor options like <code>-D</code> and <code>-I</code> to the
\r
1419 compiler when compiling preprocessed output. This fixes warnings emitted by
\r
1425 Compiler options <code>-fprofile-generate</code>, <code>-fprofile-arcs</code>, <code>-fprofile-use</code> and
\r
1426 <code>-fbranch-probabilities</code> are now handled without bailing.
\r
1431 Added support for clang’s <code>--serialize-diagnostic</code> option, storing the
\r
1432 diagnostic file (<code>.dia</code>) in the cache.
\r
1437 Added support for precompiled headers when using clang.
\r
1442 Added support for clang <code>.pth</code> (pretokenized header) files.
\r
1447 Changed the <code>-x</code> language option to use the new objective C standard for GCC
\r
1453 On a cache miss, ccache now instructs the compiler to create the object file
\r
1454 at the real destination and then copies the file into the cache instead of
\r
1455 the other way around. This is needed to support compiler options like
\r
1456 <code>-fprofile-arcs</code> and <code>--serialize-diagnostics</code>.
\r
1461 ccache now checks that included files' ctimes aren’t too new. This check can
\r
1462 be turned off by adding <code>include_file_ctime</code> to the “ccache sloppiness”
\r
1468 Added possibility to get cache hits based on filename, size, mtime and ctime
\r
1469 only. On other words, source code files are not even read, only stat-ed. This
\r
1470 operation mode is opt-in by adding <code>file_stat_matches</code> to the “ccache
\r
1471 sloppiness” setting.
\r
1476 The filename part of options like <code>-Wp,-MDfilename</code> is no longer included in
\r
1477 the hash since the filename doesn’t have any bearing on the result.
\r
1482 Added a “read-only direct” configuration setting, which is like the
\r
1483 ordinary read-only setting except that ccache will only try to retrieve
\r
1484 results from the cache using the direct mode, not the preprocessor mode.
\r
1489 The display and interpretation of cache size has been changed to use SI
\r
1495 Default cache size is now 5 GB (was previously 1 GiB).
\r
1500 Added configuration option to set the compression level of compressed object
\r
1501 files in the cache.
\r
1506 Added support for <code>@file</code> and <code>-@file</code> arguments (reading options from a
\r
1512 <code>-Wl,</code> options are no longer included in the hash since they don’t affect
\r
1518 Bail out on too hard compiler option <code>-Wp,-P</code>.
\r
1523 Optimized MD4 calculation code on little-endian systems.
\r
1528 Various improvements and fixes on win32.
\r
1533 Improved logging to the ccache log file.
\r
1538 Added <code>--dump-manifest</code> command-line option for debugging purposes.
\r
1543 Added <code>--with-bundled-zlib</code> configure option.
\r
1548 Upgraded bundled zlib to version 1.2.8.
\r
1553 Improved <code>dev.mk</code> to be more platform independent.
\r
1558 Made the test suite work with clang and gcc-llvm on OS X.
\r
1563 Various other improvements of the test suite.
\r
1568 <div class="sect2">
\r
1569 <h3 id="_bug_fixes_13">Bug fixes</h3>
\r
1570 <div class="ulist"><ul>
\r
1573 Any previous <code>.stderr</code> is now removed from the cache when recaching.
\r
1578 Fixed an issue when handling the <code>-arch</code> compiler option with an argument.
\r
1583 Fixed race condition when creating the initial cache directory.
\r
1588 Fixed test suite failures when <code>CC</code> is a ccache-wrapped compiler.
\r
1595 <div class="sect1">
\r
1596 <h2 id="_ccache_3_1_12">ccache 3.1.12</h2>
\r
1597 <div class="sectionbody">
\r
1598 <div class="paragraph"><p>Release date: 2016-07-12</p></div>
\r
1599 <div class="sect2">
\r
1600 <h3 id="_bug_fixes_14">Bug fixes</h3>
\r
1601 <div class="ulist"><ul>
\r
1604 Fixed a bug where (due to ccache rewriting paths) the compiler could choose
\r
1605 incorrect include files if <code>CCACHE_BASEDIR</code> is used and the source file path
\r
1606 is absolute and is a symlink.
\r
1613 <div class="sect1">
\r
1614 <h2 id="_ccache_3_1_11">ccache 3.1.11</h2>
\r
1615 <div class="sectionbody">
\r
1616 <div class="paragraph"><p>Release date: 2015-03-07</p></div>
\r
1617 <div class="sect2">
\r
1618 <h3 id="_bug_fixes_15">Bug fixes</h3>
\r
1619 <div class="ulist"><ul>
\r
1622 Fixed bug which could result in false cache hits when source code contains
\r
1623 <code>'"'</code> followed by <code>" /*"</code> or <code>" //"</code> (with variations).
\r
1628 Made hash of cached result created with and without <code>CCACHE_CPP2</code> different.
\r
1629 This makes it possible to rebuild with <code>CCACHE_CPP2</code> set without having to
\r
1630 clear the cache to get new results.
\r
1635 Don’t try to reset a non-existing stats file. This avoids “No such file or
\r
1636 directory” messages in the ccache log when the cache directory doesn’t
\r
1644 <div class="sect1">
\r
1645 <h2 id="_ccache_3_1_10">ccache 3.1.10</h2>
\r
1646 <div class="sectionbody">
\r
1647 <div class="paragraph"><p>Release date: 2014-10-19</p></div>
\r
1648 <div class="sect2">
\r
1649 <h3 id="_new_features_and_improvements_6">New features and improvements</h3>
\r
1650 <div class="ulist"><ul>
\r
1653 Added support for the <code>-Xclang</code> compiler option.
\r
1658 Improved handling of exit code of internally executed processes.
\r
1663 Zero length object files in the cache are now rejected as invalid.
\r
1668 Bail out on option <code>-gsplit-dwarf</code> (since it produces multiple output files).
\r
1673 Compiler option <code>-fdebug-prefix-map</code> is now ignored (not part of the hash).
\r
1674 (The <code>-fdebug-prefix-map</code> option may be used in combination with
\r
1675 <code>CCACHE_BASEDIR</code> to reuse results across different directories.)
\r
1680 Added note in documentation that <code>--ccache-skip</code> currently does not mean
\r
1681 “don’t hash the following option”.
\r
1686 To enable support for precompiled headers (PCH), <code>CCACHE_SLOPPINESS</code> now also
\r
1687 needs to include the new <code>pch_defines</code> sloppiness. This is because ccache
\r
1688 can’t detect changes in the source code when only defined macros have been
\r
1694 Stale files in the internal temporary directory (<code><ccache_dir>/tmp</code>) are now
\r
1695 cleaned up if they are older than one hour.
\r
1700 <div class="sect2">
\r
1701 <h3 id="_bug_fixes_16">Bug fixes</h3>
\r
1702 <div class="ulist"><ul>
\r
1705 Fixed path canonicalization in <code>make_relative_path()</code> when path doesn’t
\r
1711 Fixed bug in <code>common_dir_prefix_length()</code>. This corrects the <code>CCACHE_BASEDIR</code>
\r
1717 ccache no longer tries to create the cache directory when <code>CCACHE_DISABLE</code> is
\r
1723 Fixed bug when reading manifests with a very large number of file info
\r
1729 Fixed problem with logging of current working directory.
\r
1736 <div class="sect1">
\r
1737 <h2 id="_ccache_3_1_9">ccache 3.1.9</h2>
\r
1738 <div class="sectionbody">
\r
1739 <div class="paragraph"><p>Release date: 2013-01-06</p></div>
\r
1740 <div class="sect2">
\r
1741 <h3 id="_bug_fixes_17">Bug fixes</h3>
\r
1742 <div class="ulist"><ul>
\r
1745 The EAGAIN signal is now handled correctly when emitting cached stderr
\r
1746 output. This fixes a problem triggered by large error outputs from the
\r
1752 Subdirectories in the cache are no longer created in read-only mode.
\r
1757 Fixed so that ccache’s log file descriptor is not made available to the
\r
1763 Improved error reporting when failing to create temporary stdout/stderr files
\r
1764 when executing the compiler.
\r
1769 Disappearing temporary stdout/stderr files are now handled gracefully.
\r
1774 <div class="sect2">
\r
1775 <h3 id="_other">Other</h3>
\r
1776 <div class="ulist"><ul>
\r
1779 Fixed test suite to work on ecryptfs.
\r
1786 <div class="sect1">
\r
1787 <h2 id="_ccache_3_1_8">ccache 3.1.8</h2>
\r
1788 <div class="sectionbody">
\r
1789 <div class="paragraph"><p>Release date: 2012-08-11</p></div>
\r
1790 <div class="sect2">
\r
1791 <h3 id="_new_features_and_improvements_7">New features and improvements</h3>
\r
1792 <div class="ulist"><ul>
\r
1795 Made paths to dependency files relative in order to increase cache hits.
\r
1800 Added work-around to make ccache work with buggy GCC 4.1 when creating a
\r
1801 pre-compiled header.
\r
1806 Clang plugins are now hashed to catch plugin upgrades.
\r
1811 <div class="sect2">
\r
1812 <h3 id="_bug_fixes_18">Bug fixes</h3>
\r
1813 <div class="ulist"><ul>
\r
1816 Fixed crash when the current working directory has been removed.
\r
1821 Fixed crash when stderr is closed.
\r
1826 Corrected a corner case when parsing backslash escapes in string
\r
1832 Paths are now correctly canonicalized when computing paths relative to the
\r
1838 <div class="sect2">
\r
1839 <h3 id="_other_2">Other</h3>
\r
1840 <div class="ulist"><ul>
\r
1843 Made git version macro work when compiling outside of the source directory.
\r
1848 Fixed <code>static_assert</code> macro definition clash with GCC 4.7.
\r
1855 <div class="sect1">
\r
1856 <h2 id="_ccache_3_1_7">ccache 3.1.7</h2>
\r
1857 <div class="sectionbody">
\r
1858 <div class="paragraph"><p>Release date: 2012-01-08</p></div>
\r
1859 <div class="sect2">
\r
1860 <h3 id="_bug_fixes_19">Bug fixes</h3>
\r
1861 <div class="ulist"><ul>
\r
1864 Non-writable <code>CCACHE_DIR</code> is now handled gracefully when <code>CCACHE_READONLY</code> is
\r
1870 Made failure to create files (typically due to bad directory permissions) in
\r
1871 the cache directory fatal. Previously, such failures were silently and
\r
1872 erroneously flagged as "compiler produced stdout".
\r
1877 Both the <code>-specs=file</code> and <code>--specs=file</code> forms are now recognized.
\r
1882 Added recognition and hashing of GCC plugins specified with <code>-fplugin=file</code>.
\r
1887 <code>CCACHE_COMPILERCHECK</code> now also determines how to hash explicit specs files
\r
1888 (<code>-specs=file</code>).
\r
1893 Added <code>CPATH</code>, <code>C_INCLUDE_PATH</code> and similar environment variables to the hash
\r
1894 to avoid false cache hits when such variables have changed.
\r
1899 Corrected log message when unify mode is enabled.
\r
1904 Reverted the GCC bug compatibility introduced in ccache 3.1.5 for <code>-MT</code>/<code>-MQ</code>
\r
1905 options with concatenated arguments. (The bug is fixed in recent GCC
\r
1911 <div class="sect2">
\r
1912 <h3 id="_other_3">Other</h3>
\r
1913 <div class="ulist"><ul>
\r
1916 Corrected license header for <code>mdfour.c</code>.
\r
1921 Improved documentation on how to fix bad object files in the cache.
\r
1928 <div class="sect1">
\r
1929 <h2 id="_ccache_3_1_6">ccache 3.1.6</h2>
\r
1930 <div class="sectionbody">
\r
1931 <div class="paragraph"><p>Release date: 2011-08-21</p></div>
\r
1932 <div class="sect2">
\r
1933 <h3 id="_new_features_and_improvements_8">New features and improvements</h3>
\r
1934 <div class="ulist"><ul>
\r
1937 Rewrite argument to <code>--sysroot</code> if <code>CCACHE_BASEDIR</code> is used.
\r
1942 <div class="sect2">
\r
1943 <h3 id="_bug_fixes_20">Bug fixes</h3>
\r
1944 <div class="ulist"><ul>
\r
1947 Don’t crash if <code>getcwd()</code> fails.
\r
1952 Fixed alignment of “called for preprocessing” counter.
\r
1959 <div class="sect1">
\r
1960 <h2 id="_ccache_3_1_5">ccache 3.1.5</h2>
\r
1961 <div class="sectionbody">
\r
1962 <div class="paragraph"><p>Release date: 2011-05-29</p></div>
\r
1963 <div class="sect2">
\r
1964 <h3 id="_new_features_and_improvements_9">New features and improvements</h3>
\r
1965 <div class="ulist"><ul>
\r
1968 Added a new statistics counter named “called for preprocessing”.
\r
1973 The original command line is now logged to the file specified with
\r
1974 <code>CCACHE_LOGFILE</code>.
\r
1979 Improved error logging when system calls fail.
\r
1984 Added support for rewriting absolute paths in <code>-F</code>/<code>-iframework</code> GCC
\r
1990 Improved order of statistics counters in <code>ccache -s</code> output.
\r
1995 <div class="sect2">
\r
1996 <h3 id="_bug_fixes_21">Bug fixes</h3>
\r
1997 <div class="ulist"><ul>
\r
2000 The <code>-MF</code>/<code>-MT</code>/<code>-MQ</code> options with concatenated argument are now handled
\r
2001 correctly when they are last on the command line.
\r
2006 ccache is now bug compatible with GCC for the <code>-MT</code>/<code>-MQ</code> options with
\r
2007 concatenated arguments.
\r
2012 Fixed a minor memory leak.
\r
2017 Systems that lack (and don’t need to be linked with) libm are now supported.
\r
2024 <div class="sect1">
\r
2025 <h2 id="_ccache_3_1_4">ccache 3.1.4</h2>
\r
2026 <div class="sectionbody">
\r
2027 <div class="paragraph"><p>Release date: 2011-01-09</p></div>
\r
2028 <div class="sect2">
\r
2029 <h3 id="_bug_fixes_22">Bug fixes</h3>
\r
2030 <div class="ulist"><ul>
\r
2033 Made a work-around for a bug in <code>gzputc()</code> in zlib 1.2.5.
\r
2038 Corrupt manifest files are now removed so that they won’t block direct mode
\r
2044 ccache now copes with file systems that don’t know about symbolic links.
\r
2049 The file handle in now correctly closed on write error when trying to create
\r
2057 <div class="sect1">
\r
2058 <h2 id="_ccache_3_1_3">ccache 3.1.3</h2>
\r
2059 <div class="sectionbody">
\r
2060 <div class="paragraph"><p>Release date: 2010-11-28</p></div>
\r
2061 <div class="sect2">
\r
2062 <h3 id="_bug_fixes_23">Bug fixes</h3>
\r
2063 <div class="ulist"><ul>
\r
2066 The -MFarg, -MTarg and -MQarg compiler options (i.e, without space between
\r
2067 option and argument) are now handled correctly.
\r
2072 <div class="sect2">
\r
2073 <h3 id="_other_4">Other</h3>
\r
2074 <div class="ulist"><ul>
\r
2077 Portability fixes for HP-UX 11.00 and other esoteric systems.
\r
2084 <div class="sect1">
\r
2085 <h2 id="_ccache_3_1_2">ccache 3.1.2</h2>
\r
2086 <div class="sectionbody">
\r
2087 <div class="paragraph"><p>Release date: 2010-11-21</p></div>
\r
2088 <div class="sect2">
\r
2089 <h3 id="_bug_fixes_24">Bug fixes</h3>
\r
2090 <div class="ulist"><ul>
\r
2093 Bail out on too hard compiler options <code>-fdump-*</code>.
\r
2098 NULL return values from malloc/calloc of zero bytes are now handled
\r
2104 Fixed issue when parsing precompiler output on AIX.
\r
2109 <div class="sect2">
\r
2110 <h3 id="_other_5">Other</h3>
\r
2111 <div class="ulist"><ul>
\r
2114 Improved documentation on which information is included in the hash sum.
\r
2119 Made the “too new header file” test case work on file systems with
\r
2120 unsynchronized clocks.
\r
2125 The test suite now also works on systems that lack a /dev/zero.
\r
2132 <div class="sect1">
\r
2133 <h2 id="_ccache_3_1_1">ccache 3.1.1</h2>
\r
2134 <div class="sectionbody">
\r
2135 <div class="paragraph"><p>Release date: 2010-11-07</p></div>
\r
2136 <div class="sect2">
\r
2137 <h3 id="_bug_fixes_25">Bug fixes</h3>
\r
2138 <div class="ulist"><ul>
\r
2141 ccache now falls back to preprocessor mode when a non-regular include file
\r
2142 (device, socket, etc) has been detected so that potential hanging due to
\r
2143 blocking reads is avoided.
\r
2148 CRC errors are now detected when decompressing compressed files in the cache.
\r
2153 Fixed potential object file corruption race on NFS.
\r
2158 Minor documentation corrections.
\r
2163 Fixed configure detection of ar.
\r
2168 ccache development version (set by dev.mk) now works with gits whose
\r
2169 <code>describe</code> command doesn’t understand <code>--dirty</code>.
\r
2174 <div class="sect2">
\r
2175 <h3 id="_other_6">Other</h3>
\r
2176 <div class="ulist"><ul>
\r
2179 Minor debug log message improvements.
\r
2186 <div class="sect1">
\r
2187 <h2 id="_ccache_3_1">ccache 3.1</h2>
\r
2188 <div class="sectionbody">
\r
2189 <div class="paragraph"><p>Release date: 2010-09-16</p></div>
\r
2190 <div class="sect2">
\r
2191 <h3 id="_new_features_and_improvements_10">New features and improvements</h3>
\r
2192 <div class="ulist"><ul>
\r
2195 Added support for hashing the output of a custom command (e.g. <code>%compiler%
\r
2196 --version</code>) to identify the compiler instead of stat-ing or hashing the
\r
2197 compiler binary. This can improve robustness when the compiler (as seen by
\r
2198 ccache) actually isn’t the real compiler but another compiler wrapper.
\r
2203 Added support for caching compilations that use precompiled headers. (See the
\r
2204 manual for important instructions regarding this.)
\r
2209 Locking of the files containing statistics counters is now done using
\r
2210 symlinks instead of POSIX locks. This should make ccache behave a lot better
\r
2211 on file systems where POSIX locks are slow or broken (e.g. NFS on some
\r
2217 Manifest files are now updated without the need of taking locks.
\r
2222 Updates of statistics counters are now always done in one of the sub-level
\r
2223 statistics files. This reduces lock contention, which especially improves
\r
2224 performance on slow NFS mounts.
\r
2229 Reading and writing of statistics counters has been made forward-compatible
\r
2230 (unknown counters are retained).
\r
2235 Files are now read without using <code>mmap()</code>. This has two benefits: it’s more
\r
2236 robust against file changes during reading and it improves performance on
\r
2237 poor systems where <code>mmap()</code> doesn’t use the disk cache.
\r
2242 Added <code>.cp</code> and <code>.CP</code> as known C++ suffixes.
\r
2252 Added <code>-install_name</code> as an option known to take an argument. (This improves
\r
2253 statistics when using the Darwin linker.)
\r
2258 <div class="sect2">
\r
2259 <h3 id="_bug_fixes_26">Bug fixes</h3>
\r
2260 <div class="ulist"><ul>
\r
2263 Non-fatal error messages are now never printed to stderr but logged instead.
\r
2268 Fixed a bug affecting failing commands when <code>--ccache-skip</code> is used.
\r
2273 Made <code>--ccache-skip</code> work for all options.
\r
2278 EINTR is now handled correctly.
\r
2283 <div class="sect2">
\r
2284 <h3 id="_other_7">Other</h3>
\r
2285 <div class="ulist"><ul>
\r
2288 Work on porting ccache to win32 (native), mostly done by Ramiro Polla. The
\r
2289 port is not yet finished, but will hopefully be complete in some subsequent
\r
2295 Added a <code>--nostats</code> flag to the performance benchmark program.
\r
2300 Made the performance benchmark program more accurate when measuring cache
\r
2306 Added a new test framework for unit tests written in C.
\r
2311 Got rid of <code>configure-dev</code>; dev mode is now given by <code>dev.mk.in</code> presence.
\r
2316 Improved documentation on how to combine ccache with other compiler wrappers
\r
2317 (like <code>distcc</code>).
\r
2322 New <code>LICENSE.txt</code> file with licensing and copyright details about bundled
\r
2328 New <code>AUTHORS.txt</code> file with a list of ccache contributors.
\r
2333 New <code>HACKING.txt</code> file with some notes about ccache code conventions.
\r
2340 <div class="sect1">
\r
2341 <h2 id="_ccache_3_0_1">ccache 3.0.1</h2>
\r
2342 <div class="sectionbody">
\r
2343 <div class="paragraph"><p>Release date: 2010-07-15</p></div>
\r
2344 <div class="sect2">
\r
2345 <h3 id="_bug_fixes_27">Bug fixes</h3>
\r
2346 <div class="ulist"><ul>
\r
2349 The statistics counter “called for link” is now correctly updated when
\r
2350 linking with a single object file.
\r
2355 Fixed a problem with out-of-source builds.
\r
2362 <div class="sect1">
\r
2363 <h2 id="_ccache_3_0">ccache 3.0</h2>
\r
2364 <div class="sectionbody">
\r
2365 <div class="paragraph"><p>Release date: 2010-06-20</p></div>
\r
2366 <div class="sect2">
\r
2367 <h3 id="_general">General</h3>
\r
2368 <div class="ulist"><ul>
\r
2371 ccache is now licensed under the GNU General Public License (GPL) version 3
\r
2377 <div class="sect2">
\r
2378 <h3 id="_upgrade_notes">Upgrade notes</h3>
\r
2379 <div class="ulist"><ul>
\r
2382 The way the hashes are calculated has changed, so you won’t get cache hits
\r
2383 for compilation results stored by older ccache versions. Because of this, you
\r
2384 might as well clear the old cache directory with <code>ccache --clear</code> if you
\r
2385 want, unless you plan to keep using an older ccache version.
\r
2390 <div class="sect2">
\r
2391 <h3 id="_new_features_and_improvements_11">New features and improvements</h3>
\r
2392 <div class="ulist"><ul>
\r
2395 ccache now has a “direct mode” where it computes a hash of the source code
\r
2396 (including all included files) and compiler options without running the
\r
2397 preprocessor. By not running the preprocessor, CPU usage is reduced; the
\r
2398 speed is somewhere between 1 and 5 times that of ccache running in
\r
2399 traditional mode, depending on the circumstances. The speedup will be higher
\r
2400 when I/O is fast (e.g., when files are in the disk cache). The direct mode
\r
2401 can be disabled by setting <code>CCACHE_NODIRECT</code>.
\r
2406 Support has been added for rewriting absolute paths to relative paths when
\r
2407 hashing, in order to increase cache hit rate when building the same source
\r
2408 code in different directories even when compiling with <code>-g</code> and when using
\r
2409 absolute include directory paths. This is done by setting the
\r
2410 <code>CCACHE_BASEDIR</code> environment variable to an absolute path that specifies
\r
2411 which paths to rewrite.
\r
2416 Object files are now optionally stored compressed in the cache. The runtime
\r
2417 cost is negligible, and more files will fit in the ccache directory and in
\r
2418 the disk cache. Set <code>CCACHE_COMPRESS</code> to enable object file compression. Note
\r
2419 that you can’t use compression in combination with the hard link feature.
\r
2424 A <code>CCACHE_COMPILERCHECK</code> option has been added. This option tells ccache what
\r
2425 compiler-identifying information to hash to ensure that results retrieved
\r
2426 from the cache are accurate. Possible values are: none (don’t hash anything),
\r
2427 mtime (hash the compiler’s mtime and size) and content (hash the content of
\r
2428 the compiler binary). The default is mtime.
\r
2433 It is now possible to specify extra files whose contents should be included
\r
2434 in the hash sum by setting the <code>CCACHE_EXTRAFILES</code> option.
\r
2439 Added support for Objective-C and Objective-C++. The statistics counter
\r
2440 “not a C/C++ file” has been renamed to “unsupported source language”.
\r
2445 Added support for the <code>-x</code> compiler option.
\r
2450 Added support for long command-line options.
\r
2455 A <code>CACHEDIR.TAG</code> file is now created in the cache directory. See
\r
2456 <a href="http://www.brynosaurus.com/cachedir/">http://www.brynosaurus.com/cachedir/</a>.
\r
2461 Messages printed to the debug log (specified by <code>CCACHE_LOGFILE</code>) have been
\r
2467 You can relax some checks that ccache does in direct mode by setting
\r
2468 <code>CCACHE_SLOPPINESS</code>. See the manual for more information.
\r
2473 <code>CCACHE_TEMPDIR</code> no longer needs to be on the same filesystem as
\r
2474 <code>CCACHE_DIR</code>.
\r
2479 The default value of <code>CCACHE_TEMPDIR</code> has been changed to <code>$CCACHE_DIR/tmp</code>
\r
2480 to avoid cluttering the top directory.
\r
2485 Temporary files that later will be moved into the cache are now created in
\r
2486 the cache directory they will end up in. This makes ccache more friendly to
\r
2487 Linux’s directory layout.
\r
2492 Improved the test suite and added tests for most of the new functionality.
\r
2493 It’s now also possible to specify a subset of tests to run.
\r
2498 Standard error output from the compiler is now only stored in the cache if
\r
2499 it’s non-empty.
\r
2504 If the compiler produces no object file or an empty object file, but gives a
\r
2505 zero exit status (could be due to a file system problem, a buggy program
\r
2506 specified by <code>CCACHE_PREFIX</code>, etc.), ccache copes with it properly.
\r
2511 Added <code>installcheck</code> and <code>distcheck</code> make targets.
\r
2516 Clarified cache size limit options' and cleanup semantics.
\r
2521 Improved display of cache max size values.
\r
2526 The following options are no longer hashed in the preprocessor mode:
\r
2527 <code>-imacros</code>, <code>-imultilib</code>, <code>-iprefix</code>, <code>-iquote</code>, <code>-isysroot</code>, <code>-iwithprefix</code>,
\r
2528 <code>-iwithprefixbefore</code>, <code>-nostdinc</code>, <code>-nostdinc++</code> and <code>-U</code>.
\r
2533 <div class="sect2">
\r
2534 <h3 id="_bug_fixes_28">Bug fixes</h3>
\r
2535 <div class="ulist"><ul>
\r
2538 Various portability improvements.
\r
2543 Improved detection of home directory.
\r
2548 User-defined <code>CPPFLAGS</code> and <code>LDFLAGS</code> are now respected in the Makefile.
\r
2558 Computation of the hash sum has been improved to decrease the risk of hash
\r
2559 collisions. For instance, the compiler options <code>-X -Y</code> and <code>-X-Y</code> previously
\r
2560 contributed equally to the hash sum.
\r
2565 Bail out on too hard compiler options <code>--coverage</code>, <code>-fprofile-arcs</code>,
\r
2566 <code>-fprofile-generate</code>, <code>-fprofile-use</code>, <code>-frepo</code>, <code>-ftest-coverage</code> and
\r
2567 <code>-save-temps</code>. Also bail out on <code>@file</code> style options.
\r
2572 Errors when using multiple <code>-arch</code> compiler options are now noted as
\r
2573 “unsupported compiler option”.
\r
2578 <code>-MD</code>/<code>-MMD</code> options without <code>-MT</code>/<code>-MF</code> are now handled correctly.
\r
2583 The <code>-finput-charset</code> option is now handled correctly.
\r
2588 Added support for <code>-Wp,-MD</code> and <code>-Wp,-MMD</code> options.
\r
2593 The compiler options <code>-Xassembler</code>, <code>-b</code>, <code>-G</code> and <code>-V</code> are now correctly
\r
2594 recognized as taking an argument.
\r
2599 Debug information containing line numbers of predefined and command-line
\r
2600 macros (enabled with the compiler option <code>-g3</code>) will now be correct.
\r
2605 Corrected LRU cleanup handling of object files.
\r
2610 <code>utimes()</code> is now used instead of <code>utime()</code> when available.
\r
2615 Non-writable cache directories are now handled gracefully.
\r
2620 Corrected documentation about sharing the cache directory.
\r
2625 Fixed compilation warnings from GCC 4.3.
\r
2630 The command specified by <code>CCACHE_PREFIX</code> is no longer part of the hash.
\r
2635 Fixed bad memory access spotted by Valgrind.
\r
2640 Fixed a bug in <code>x_realloc</code>.
\r
2645 Freed memory is no longer referenced when compiling a <code>.i</code>/<code>.ii</code> file and
\r
2646 falling back to running the real compiler.
\r
2651 The test suite is now immune to external values of the <code>CCACHE_*</code> environment
\r
2657 Improved detection of recursive invocation.
\r
2662 The ccache binary is now not unconditionally stripped when installing.
\r
2667 Statistics counters are now correctly updated for -E option failures and
\r
2676 <div id="footnotes"><hr /></div>
\r
2678 <div id="footer-text">
\r
2679 Version 3.3.2<br />
\r
2681 2016-09-28 22:44:16 CEST
\r
projects / platform / upstream / ccache.git / blob