but while compiling xen (make dist) i got this error lib/libvhd.so: undefined reference to `uuid_copy@UUID_1.0' lib/libvhd.so: undefined reference to `uuid_clear@UUID_1.0' lib/libvhd.so: undefined reference to `uuid_generate@UUID_1.0' lib/libvhd.so: undefined reference to `uuid_unparse@UUID_1.0' lib/libvhd.so: undefined reference to `uuid_is_null@UUID_1.0' lib/libvhd.so: undefined reference to `uuid_compare@UUID_1.0' lib/libvhd.so: undefined reference to `uuid_parse@UUID_1.0' collect2: error: ld returned 1 exit status make[5]: *** [vhd-util] Error 1 make[5]: Leaving directory `/home/lauterbach/xen1/tools/blktap2/vhd' make[4]: *** [subdir-install-vhd] Error 2 make[4]: Leaving directory `/home/lauterbach/xen1/tools/blktap2' make[3]: *** [subdirs-install] Error 2 make[3]: Leaving directory `/home/lauterbach/xen1/tools/blktap2' make[2]: *** [subdir-install-blktap2] Error 2 make[2]: Leaving directory `/home/lauterbach/xen1/tools' make[1]: *** [subdirs-install] Error 2 make[1]: Leaving directory `/home/lauterbach/xen1/tools' make: *** [install-tools] Error 2 On Fri, Jun 10, 2016 at 2:53 PM, Safa Hamza wrote: > the uuid library is already installed.. i solved the problem by > downloading libgcc.deb then i installed this package with "dpkg -i" command > > On Fri, Jun 10, 2016 at 3:23 PM, Wei Liu wrote: > >> On Fri, Jun 10, 2016 at 01:03:49PM +0100, Safa Hamza wrote: >> > i'm working now with another PC running ubuntu 12.04 .. >> > while configuring Xen from the source i got this error >> > >> > checking uuid/uuid.h usability... yes >> > checking uuid/uuid.h presence... yes >> > checking for uuid/uuid.h... yes >> > checking for uuid_clear in -luuid... no >> > checking uuid.h usability... no >> > checking uuid.h presence... no >> > checking for uuid.h... no >> > configure: error: cannot find a valid uuid library >> >> This. >> >> Please install the uuid development library in your distro. >> >> >> Wei. >> > >