{"id":2188,"date":"2010-02-05T16:38:05","date_gmt":"2010-02-06T00:38:05","guid":{"rendered":"http:\/\/multimedia.cx\/eggs\/?p=2188"},"modified":"2010-02-05T16:38:05","modified_gmt":"2010-02-06T00:38:05","slug":"30-hour-do-nothing-build","status":"publish","type":"post","link":"https:\/\/multimedia.cx\/eggs\/30-hour-do-nothing-build\/","title":{"rendered":"30-hour Do-nothing Build"},"content":{"rendered":"<p>I have a habit of prepending &#8216;time&#8217; to all of my &#8216;make&#8217; commands in order to keep a rough estimate of how long build jobs take.<\/p>\n<p>Adhering to this custom, I performed a &#8216;make&#8217; command on a project that didn&#8217;t actually require any rebuilding. So how does the following happen?<\/p>\n<pre>\r\n$ time make -j5\r\n\r\n[...]\r\n\r\nreal    <font color=\"red\">1770m35.893s<\/font>\r\nuser    0m12.408s\r\nsys     0m11.692s\r\n<\/pre>\n<p>Answer: The machine (virtual machine, actually) had just been started, had a grossly out-of-sync clock, and must have synced to the time server during that narrow window that the build was occurring:<\/p>\n<pre>\r\nmake[2]: Warning: File `...' has modification time 1.8e+04 s in the future\r\nmake[2]: warning:  Clock skew detected.  Your build may be incomplete.\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>It takes a long time to do nothing<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2188","post","type-post","status-publish","format-standard","hentry","category-general"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"It takes a long time to do nothing\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Multimedia Mike\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/multimedia.cx\/eggs\/30-hour-do-nothing-build\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" 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