rootfs路径

Variable name           Definition                 Typical value
---------------------   ------------------------   --------------------
prefix                  /usr                       /usr
base_prefix             (empty)                    (empty)
exec_prefix             ${base_prefix}             (empty)
base_bindir             ${base_prefix}/bin         /bin
base_sbindir            ${base_prefix}/sbin        /sbin
base_libdir             ${base_prefix}/lib         /lib
datadir                 ${prefix}/share            /usr/share
sysconfdir              /etc                       /etc
localstatedir           /var                       /var
infodir                 ${datadir}/info            /usr/share/info
mandir                  ${datadir}/man             /usr/share/man
docdir                  ${datadir}/doc             /usr/share/doc
servicedir              /srv                       /srv
bindir                  ${exec_prefix}/bin         /usr/bin
sbindir                 ${exec_prefix}/sbin        /usr/sbin
libexecdir              ${exec_prefix}/libexec     /usr/libexec
libdir                  ${exec_prefix}/lib         /usr/lib
includedir              ${exec_prefix}/include     /usr/include
palmtopdir              ${libdir}/opie             /usr/lib/opie
palmqtdir               ${palmtopdir}              /usr/lib/opie
systemd_unitdir         ${systemd_unitdir}         /usr/lib/systemd
systemd_system_unitdir  ${systemd_system_unitdir}  /usr/lib/systemd/system
systemd_user_unitdir    ${systemd_user_unitdir}    /usr/lib/systemd/user