Building w/ read-only sources breaks while building the tools.
Should that be echo /u1/dyoung/scratch-cuw/T > ${OBJDIR}/PREVIOUSTOOLDIR ?

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cleandir ===> groff
rm -r -f .*_done build
rm -f a.out [Ee]rrs mklog core *.core     
rm -f PREVIOUSTOOLDIR
echo /u1/dyoung/scratch-cuw/T > PREVIOUSTOOLDIR
cannot create PREVIOUSTOOLDIR: read-only file system

*** Failed target:  realdepend
*** Failed command: echo /u1/dyoung/scratch-cuw/T > PREVIOUSTOOLDIR
*** Error code 2

Stop.
nbmake: stopped in /usr/src/tools

ERROR: Failed to make tools
*** BUILD ABORTED ***
failed sh build.sh -u -o -V MKKERBEROS=no -V USE_KERBEROS=no -V MKKERBEROS4=no -V USE_KERBEROS4=no -O /u1/dyoung/scratch-cuw/O -T /u1/dyoung/scratch-cuw/T tools
Could not build tools in /u1/dyoung/scratch-cuw/T.


-- 
David Young             OJC Technologies
dyoung@ojctech.com      Urbana, IL * (217) 278-3933