hello
in order to build   Xen from the source on my host (Intel x86-x64 running
Ubuntu mate)
I downloaded Xen Source Code from
git clone git://xenbits.xen.org/xen.git    then
git checkout -b RELEASE-4.3.1 RELEASE-4.3.1
I configured it successfully but when I want to compiled, an error showed up



cc1: all warnings being treated as errors
/home/safa/xen/tools/blktap/drivers/../../../tools/Rules.mk:89: recipe for
target 'block-qcow.o' failed
make[5]: *** [block-qcow.o] Error 1
make[5]: Leaving directory '/home/safa/xen/tools/blktap/drivers'
/home/safa/xen/tools/blktap/../../tools/Rules.mk:105: recipe for target
'subdir-install-drivers' failed
make[4]: *** [subdir-install-drivers] Error 2
make[4]: Leaving directory '/home/safa/xen/tools/blktap'
/home/safa/xen/tools/blktap/../../tools/Rules.mk:100: recipe for target
'subdirs-install' failed
make[3]: *** [subdirs-install] Error 2
make[3]: Leaving directory '/home/safa/xen/tools/blktap'
/home/safa/xen/tools/../tools/Rules.mk:105: recipe for target
'subdir-install-blktap' failed
make[2]: *** [subdir-install-blktap] Error 2
make[2]: Leaving directory '/home/safa/xen/tools'
/home/safa/xen/tools/../tools/Rules.mk:100: recipe for target
'subdirs-install' failed
make[1]: *** [subdirs-install] Error 2
make[1]: Leaving directory '/home/safa/xen/tools'
Makefile:74: recipe for target 'install-tools' failed
make: *** [install-tools] Error 2


how can I fix it... it may be a missing package!!  I didn't find the
solution after spending a long time googling
i  I’ll appreciate your help