variables from shell output in makefile

["andremachado" <andremachado@techforce.com.br>]

Hello,
I am trying to create a rudimentary package for php-java-bridge.sf.net.
The problem now is that makefiles does not accept regular bash commands and
need different sintax. Also, Policy define to avoid "bashisms".
Reading 
http://www.gnu.org/software/make/manual/make.html#Shell-Function
I found the "$(shell command parms)" .
But it still leaving EXT_DIR empty.
Please, what am I doing wrong?
Regards
Andre Felipe Machado
http://www.techforce.com.br


#	EXT_DIR=`/usr/bin/php-config --extension-dir`;
	EXT_DIR = $(shell /usr/bin/php-config --extension-dir);

	mkdir -p ${CURDIR}/debian/php-java-bridge/var/lib/tomcat5/webapps; \
	cp ${CURDIR}/debian/php-java-bridge/${EXT_DIR}/JavaBridge.war
${CURDIR}/debian/php-java-bridge/var/lib/tomcat5/webapps;