http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51617
Bug #: 51617 Summary: [C++0x] async(f) isn't. Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: d...@boostpro.com Created attachment 26132 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26132 demonstration I am finding I have to explicitly pass a launch policy to get async to run anything in a thread. For example, when I time the attached with -DFORCE_PARALLEL I get /tmp/tst 81.54s user 0.23s system 628% cpu 13.001 total and without it I get: /tmp/tst 41.29s user 0.05s system 99% cpu 41.343 total See also bug 49204