perl: Standardise config.sh location

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/classes/cpan-base.bbclass

@@ -10,7 +10,7 @@ RDEPENDS  += "${@["perl", ""][(bb.data.inherits_class('native', d))]}"
 # Determine the staged version of perl from the perl configuration file
 def get_perl_version(d):
 	import re
-    	cfg = bb.data.expand('${STAGING_DIR}/${HOST_SYS}/perl/config.sh', d)
+    	cfg = bb.data.expand('${STAGING_LIBDIR}/perl/config.sh', d)
 	try:
 		f = open(cfg, 'r')
 	except IOError:

meta/classes/cpan.bbclass

@@ -10,11 +10,13 @@ export PERLCONFIGTARGET = "${@is_target(d)}"
 
 # Env var which tells perl where the perl include files are
 export PERL_INC = "${STAGING_LIBDIR}/perl/${@get_perl_version(d)}/CORE"
+export PERL_LIB = "${STAGING_DATADIR}/perl/${@get_perl_version(d)}"
+export PERL_ARCHLIB = "${STAGING_LIBDIR}/perl/${@get_perl_version(d)}"
 
 cpan_do_configure () {
 	yes '' | perl Makefile.PL ${EXTRA_CPANFLAGS}
 	if [ "${BUILD_SYS}" != "${HOST_SYS}" ]; then
-		. ${STAGING_DIR}/${TARGET_SYS}/perl/config.sh
+		. ${STAGING_LIBDIR}/perl/config.sh
 		if [ "${IS_NEW_PERL}" = "yes" ]; then
 			sed -i -e "s:\(SITELIBEXP = \).*:\1${sitelibexp}:" \
 				-e "s:\(SITEARCHEXP = \).*:\1${sitearchexp}:" \

meta/classes/cpan_build.bbclass

@@ -22,7 +22,7 @@ DEPENDS_prepend = "${@cpan_build_dep_prepend(d)}"
 cpan_build_do_configure () {
 	if [ ${@is_target(d)} == "yes" ]; then
 		# build for target
-		. ${STAGING_DIR}/${TARGET_SYS}/perl/config.sh
+		. ${STAGING_LIBDIR}/perl/config.sh
 		if [ "${IS_NEW_PERL}" = "yes" ]; then
 			perl Build.PL --installdirs vendor \
 				--destdir ${D} \