$FreeBSD$ We try to maintain the minimal set of headers required to build, as the full set of files from MdePkg is quite large (10MB at the time of writing). To do this when performing an upgrade, execute the following: # Generate list of the headers needed to build cp -r ../vendor/edk2/dist/MdePkg/Include sys/contrib/edk2 cd lib/libefivar make pushd `make -V .OBJDIR` cat .depend*.o | grep sys/contrib | cut -d' ' -f 3 | sort -u | sed -e 's=/full/path/sys/contrib/edk2/==' > /tmp/xxx popd # Merge the needed files cd ../../sys/contrib/edk2 svn revert -R . for i in `cat /tmp/xxx`; do svn merge -c VendorRevision svn+ssh://repo.freebsd.org/base/vendor/edk2/dist/MdePkg/$i $i done svn merge -c VendorRevision \ svn+ssh://repo.freebsd.org/base/vendor/edk2/dist/MdePkg/MdePkg.dec MdePkg.dec