139169 – math/atlas post-build target fails with WKDIRPREFIX defined.

	The post-build target of math/atlas fails.

	In /etc/make.conf I have defined:
	WRKDIRPREFIX=/space

	cd /usr/port/math/atlas
	make -DWITH_STATICLIB
	...
	...
	ATLAS install complete.  Examine 
	ATLAS/bin/<arch>/INSTALL_LOG/SUMMARY.LOG for details.
	make clean
	rm -f *.o x* config?.out *core*
	(cd /space/usr/ports/math/atlas/work/ATLAS; /bin/mkdir -p tmp1 ;
	/bin/cp `cd /space/usr/ports/math/atlas/work/lapack; make -V WRKSRC
	WRKDIRPREFIX=""`/liblapack.a tmp1 ; cd tmp1 ; ar x liblapack.a ; ar x
	../NON_THREADED/lib/liblapack.a ; ar r ../NON_THREADED/lib/libalapack.a
	*.o ; ranlib ../NON_THREADED/lib/libalapack.a )
	cp:
	/space/space/usr/ports/math/atlas/work/lapack/work/lapack-3.2.1/liblapack.a:
	No such file or directory
	*** Error code 1

	Stop in /usr/ports/math/atlas.

	
	Note the duplicate '/space' in '/space/space/usr/ports/...'

Fix: 

I worked around by unsetting WRKDIRPREFIX.
	I believe the problem comes from the following Makefile line

	LAPACKWRKSRC=`cd ${WRKDIR}/lapack; ${MAKE} -V WRKSRC WRKDIRPREFIX=""`

	Sorry no fix.
How-To-Repeat: 	Set WRKDIRPREFIX and

	cd /usr/ports/math/atlas
	make -DWITH_STATICLIB