make world + jail issues

[Morgan Reed]

I'm having some issues attempting to build a jail per the jail(8) man
page, following through the steps outlined there I've hit a few
issues.
Once I get to building the world. i.e. 'make world
DESTDIR=/usr/jailroot' I've fallen on some issues, all of which appear
to be related to paths;
First run 'install' threw an error 64 part way through because it
couldn't find one of the destination directories, solved by doing
'mkdir /usr/jailroot/usr ; mkdir /usr/jailroot/usr/include'.
Next run 'install' error code 64 again at a different stage, 'mkdir
/usr/jailroot/usr/libdata'
After these issues are bypassed I hit the following error;

mkdep -f .depend -a
-I/usr/obj/usr/src/world_i386/usr/src/gnu/usr.bin/cc34/cc
_tools/gengenrtl/..//../cc_prep
-I/usr/src/gnu/usr.bin/cc34/cc_tools/gengenrtl/.
                                                        .//../cc_prep
-I/usr/src/gnu/usr.bin/cc34/cc_tools/gengenrtl/..//../cc_prep/conf
   ig -I/usr/src/gnu/usr.bin/cc34/cc_tools/gengenrtl/..//../../../../contrib/gcc-3.

       4/gcc -I/usr/src/gnu/usr.bin/cc34/cc_tools/gengenrtl/..//../../../../contrib/gcc

       -3.4/gcc/config
-I/usr/src/gnu/usr.bin/cc34/cc_tools/gengenrtl/..//../../../../c
 ontrib/gcc-3.4/include -DIN_GCC -DHAVE_CONFIG_H -DPREFIX=\"/usr\"
-DPREFIX1=\"/usr\" -DPREFIX2=\"/usr\" -DSTACK_PROTECTOR
-DHAVE_STDLIB_H -DHAVE_STRING_H -DGENERATOR_FILE -I.
/usr/src/gnu/usr.bin/cc34/cc_tools/gengenrtl/..//../../../../contrib/gcc-3.4/gcc/
gengenrtl.c
*** Error code 1
Stop in /usr/src/gnu/usr.bin/cc34/cc_tools/gengenrtl.
*** Error code 1
Stop in /usr/src/gnu/usr.bin/cc34/cc_tools.
*** Error code 1
Stop in /usr/src/gnu/lib/gcc34/libgcc.
*** Error code 1
Stop in /usr/src.
*** Error code 1
Stop in /usr/src.
*** Error code 1
Stop in /usr/src.
*** Error code 1
Stop in /usr/src.

Any assistance greatly appreciated
Morgan