Hello Alasdair G Kergon. I'm mailing you because of an issue I've run into which I think comes from your commit: https://git.fedorahosted.org/cgit/lvm2.git/commit/?id=3cd644aeb5cac432a92ad50584973a3430168ed6
On Debian there's librt.so but no librt.pc. Could you please add a PKG_CHECK_MODULES call in configure.in to check if RT_PC should be set to "librt" or ""? (Fwiw, I've file http://bugs.debian.org/797800 to track this and another small issue on the Debian side.) Regards, Andreas Henriksson