I am also interested in whether the license was moved from GPL to Apache 2.0.
Is there a formal answer available to this?
The support page (http://support.hyperic.com/display/SIGAR/Home) still states GPL.
Maybe I'm wrong but in this previous thread http://forums.hyperic.com/jiveforums/thread.jspa?messageID=31290稺, dougm said that SIGAR will move from GPLv2 license to Apache2, which is confirm in sources code.
But in the main documentation page http://support.hyperic.com/display/SIGAR/Home you always said that the license type is GNU GPL.
Is it only a page update problem or are you always in GPL license type ?
Take a look at:
Sigar 1.6.4 binaries are available under Apache 2.0 license