Problems using 'make -j2' on GNU/Linux

[Angelo Graziosi <angelo.graziosi@alice.it>]

After recent changes [1], using 'make -j2 bootstrap', on GNU/Linux 
Kubuntu 8.04, fails

[...]
make[3]: Entering directory `/home/angelo/downloads/emacs.ports/build/lisp'
wd=/home/angelo/downloads/emacs.ports/emacs/lisp; subdirs=`(cd $wd; find 
. -type d -print)`; for file in $subdirs; do case $file in */Old | */RCS 
| */CVS | */CVS/* | */.* | */.*/* | */=* ) ;; *) wins="$wins $wd/$file" 
;; esac; done; \
	for file in $wins; do \
	   /home/angelo/downloads/emacs.ports/emacs/lisp/../update-subdirs $file; \
	done;
make[3]: Leaving directory `/home/angelo/downloads/emacs.ports/build/lisp'
make -w --jobserver-fds=5,6 - --jobserver-fds=5,6 - --jobserver-fds=5,6 
- --jobserver-fds=5,6 -j bootstrap-emacs
make[3]: Entering directory `/home/angelo/downloads/emacs.ports/build/src'
`/bin/pwd`/temacs --batch --load loadup bootstrap
/bin/sh: /home/angelo/downloads/emacs.ports/build/src/temacs: Permission 
denied
make[3]: *** [bootstrap-emacs] Error 126
make[3]: Leaving directory `/home/angelo/downloads/emacs.ports/build/src'
make[2]: *** [witness-emacs] Error 2
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory `/home/angelo/downloads/emacs.ports/build/src'
make[1]: *** [src] Error 2
make[1]: Leaving directory `/home/angelo/downloads/emacs.ports/build'
make: *** [bootstrap] Error 2


Instead 'make bootstrap' works.


Cheers,
    Angelo.
---
[1] http://lists.gnu.org/archive/html/emacs-devel/2008-06/msg01405.html