[OE-core] [PATCH] cpan.bbclass: Fix config error while patches to Makefile.PL

[xin.ouyang at windriver.com]

From: Xin Ouyang <Xin.Ouyang at windriver.com>

If there is a patch to Makefile.PL, a Makefile.PL but no Makefile
will be placed in ${B}/.pc/xxx.patch/ after do_patch. 
And no Makefile will be generated for *this* Makefile.PL.
While do_configure, the original code tries to sed Makefiles
matching with each Makefile.PL in {B}, so this would fail.

Signed-off-by: Xin Ouyang <Xin.Ouyang at windriver.com>
---
 meta/classes/cpan.bbclass |    1 +
 1 file changed, 1 insertion(+)

diff --git a/meta/classes/cpan.bbclass b/meta/classes/cpan.bbclass
index 587e688..2e9432c 100644
--- a/meta/classes/cpan.bbclass
+++ b/meta/classes/cpan.bbclass
@@ -23,6 +23,7 @@ cpan_do_configure () {
 		# Use find since there can be a Makefile generated for each Makefile.PL
 		for f in `find -name Makefile.PL`; do
 			f2=`echo $f | sed -e 's/.PL//'`
+			test -f $f2 || continue
 			sed -i -e "s:\(PERL_ARCHLIB = \).*:\1${PERL_ARCHLIB}:" \
 				-e 's/perl.real/perl/' \
 				$f2
-- 
1.7.9.5