I was able to get this to "build" locally, but received this error on FreeBSD. I was not able to get it to build outside of my machine, as it appears there is some other new dependency that is required to build that I am not figuring out, but I have it installed on my box. gmake[3]: Entering directory `/usr/home/jgh/workspace/ports/devel/libvirt/work/libvirt-1.1.1/src' CC libvirt_util_la-viralloc.lo CC libvirt_util_la-virarch.lo CC libvirt_util_la-viratomic.lo CC libvirt_util_la-viraudit.lo CC libvirt_util_la-virauth.lo CC libvirt_util_la-virauthconfig.lo CC libvirt_util_la-virbitmap.lo CC libvirt_util_la-virbuffer.lo CC libvirt_util_la-vircgroup.lo util/vircgroup.c: In function 'virCgroupAvailable': util/vircgroup.c:75: error: storage size of 'entry' isn't known util/vircgroup.c:85: warning: implicit declaration of function 'getmntent_r' util/vircgroup.c:85: warning: nested extern declaration of 'getmntent_r' [-Wnested-externs] util/vircgroup.c:85: warning: comparison between pointer and integer util/vircgroup.c:75: warning: unused variable 'entry' [-Wunused-variable] gmake[3]: *** [libvirt_util_la-vircgroup.lo] Error 1 gmake[3]: Leaving directory `/usr/home/jgh/workspace/ports/devel/libvirt/work/libvirt-1.1.1/src' gmake[2]: *** [all] Error 2 gmake[2]: Leaving directory `/usr/home/jgh/workspace/ports/devel/libvirt/work/libvirt-1.1.1/src' gmake[1]: *** [all-recursive] Error 1 gmake[1]: Leaving directory `/usr/home/jgh/workspace/ports/devel/libvirt/work/libvirt-1.1.1' gmake: *** [all] Error 2 -jgh