When trying a rebuild of the control build on linux (tested on rh 7.1)
The build fails when trying to copy over already built files

/bin/cp ./../../hotspot/src/share/vm/Xusage.txt /export/d1/merlin/control/build/linux-i386/hotspot-i386/server/Xusage.txt
/bin/cp: cannot create regular file `/export/d1/merlin/control/build/linux-i386/hotspot-i386/server/Xusage.txt': Permission denied
make: *** [/export/d1/merlin/control/build/linux-i386/hotspot-i386/server/Xusage.txt] Error 1
terminel.eng.sun.com:0> id
uid=26432(calvin) gid=1050(green) groups=1050(green),10(wheel)
terminel.eng.sun.com:0> trol/build/linux-i386/hotspot-i386/server/Xusage.txt <
-r--r--r-- 1 calvin green 1386 Aug 6 12:19 /export/d1/merlin/control/build/linux-i386/hotspot-i386/server/Xusage.txt

There are several other places where this fails /bin/cp -f should work
although I don't know why it feels it should do the copy anyway?