siggen.py: make sure stamp directory existing

or else "bitbake -S" from scratch may report "No such file or directory" error.

Signed-off-by: Kevin Tian <kevin.tian@intel.com>

diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index 391020a9ed82c280d533f9790f4f9a76fb08c5a5..3eecd751b4d6701329e284dec198bb4091e46f88 100644 (file)
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -137,6 +137,8 @@ class SignatureGeneratorBasic(SignatureGenerator):
         else:
             sigfile = stampbase + "." + task + ".sigbasedata" + "." + self.basehash[k]
 
+        bb.utils.mkdirhier(os.path.dirname(sigfile))
+
         data = {}
         data['basewhitelist'] = self.basewhitelist
         data['taskwhitelist'] = self.taskwhitelist