It's possible that a trailing or extra slash somewhere in the external
source path could result in the directory not being removed from
cleandirs; it's also possible that a cleandirs entry is somewhere
underneath the source tree and that tree should never have parts of it
deleted by the build system. Use oe.path.is_path_parent() (which makes
paths absolute before checking them) to find out if any path in
cleandirs is anywhere underneath the external source path, and drop it
if it is.

Signed-off-by: Paul Eggleton <paul.eggle...@linux.intel.com>
---
 meta/classes/externalsrc.bbclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes/externalsrc.bbclass b/meta/classes/externalsrc.bbclass
index ce8517c58b7..c9f5cf767d0 100644
--- a/meta/classes/externalsrc.bbclass
+++ b/meta/classes/externalsrc.bbclass
@@ -54,6 +54,7 @@ python () {
 
     if externalsrc:
         import oe.recipeutils
+        import oe.path
 
         d.setVar('S', externalsrc)
         if externalsrcbuild:
@@ -90,7 +91,7 @@ python () {
             cleandirs = oe.recipeutils.split_var_value(d.getVarFlag(task, 
'cleandirs', False) or '')
             setvalue = False
             for cleandir in cleandirs[:]:
-                if d.expand(cleandir) == externalsrc:
+                if oe.path.is_path_parent(externalsrc, d.expand(cleandir)):
                     cleandirs.remove(cleandir)
                     setvalue = True
             if setvalue:
-- 
2.14.3

-- 
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