In the meanwhile, I found out that it is only one file - "timepps.h" from git://github.com/ago/pps-tools.git (attached) - which is missing. I copied it into /usr/include and then configure/make builds ntpd with the ATOM refclock (PPS) support. Tested with Linux 2.6.38 and ntp-4.2.6.p2+dfsg (sources).
I found the hint for this solution in bug #805661, which apparently is the same problem. ** Attachment added: "timepps.h" https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/826873/+attachment/2284222/+files/timepps.h -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/826873 Title: ATOM refclock driver not compiled into ntpd To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/826873/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs