bitbake: siggen: add means of ignoring basehash mismatch

If you run the setVariable command to set variables then you end up
causing the basehash to not match the previously computed values, which
triggers error messages. These mismatches are expected, so add a means
of disabling them.

(Bitbake rev: 5a80c0e210f26526afbe8f266b7b1a9c03334967)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index fa8a6b1623..b20b9cf771 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -101,6 +101,7 @@ class SignatureGeneratorBasic(SignatureGenerator):
 
     def _build_data(self, fn, d):
 
+        ignore_mismatch = ((d.getVar("BB_HASH_IGNORE_MISMATCH", True) or '') == '1')
         tasklist, gendeps, lookupcache = bb.data.generate_dependencies(d)
 
         taskdeps = {}
@@ -135,7 +136,7 @@ class SignatureGeneratorBasic(SignatureGenerator):
                     data = data + str(var)
             datahash = hashlib.md5(data.encode("utf-8")).hexdigest()
             k = fn + "." + task
-            if k in self.basehash and self.basehash[k] != datahash:
+            if not ignore_mismatch and k in self.basehash and self.basehash[k] != datahash:
                 bb.error("When reparsing %s, the basehash value changed from %s to %s. The metadata is not deterministic and this needs to be fixed." % (k, self.basehash[k], datahash))
             self.basehash[k] = datahash
             taskdeps[task] = alldeps