When using --enable-tests on Fedora, the linker complains with:
"undefined reference to symbol sem_getvalue", which nm shows to be in
libpthread not librt. Build tested on Fedora, Oracle Linux, and Ubuntu.
Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>