Il 03/04/2013 00:52, Peter Maydell ha scritto: > On 2 April 2013 17:45, Paolo Bonzini <pbonz...@redhat.com> wrote: >> Il 02/04/2013 17:42, Brad Smith ha scritto: >>> Replace the hardcoded list of OS's utilizing clock_gettime() for monotonic >>> time with a configure test. This is to fix the use of monotonic time on >>> OpenBSD but allows for other POSIX compliant OS's such as NetBSD to also >>> utilize clock_gettime(). >> >> I thought the list of OSes was supposed to filter out those that somehow >> had a broken CLOCK_MONOTONIC. > > Judging from wading through git history, it's mostly just > historic accretion from an initial #ifdef __linux__ which was > put in by Fabrice way back when configure was barely doing > compile-this-code checks at all. > > Google does suggest that some OSes do provide a CLOCK_MONOTONIC > but clock_gettime(CLOCK_MONOTONIC) always fails, eg Centos 3.
It would already fail, and no one reported it. CentOS 3 has a 2.4 kernel. I doubt anyone is using it with a recent QEMU. Paolo >> Otherwise, you might as well use "#ifdef CLOCK_MONOTONIC" and skip the >> configure test completely. > > Tempting. > > -- PMM > >
