3 files changed, 31 insertions, 3 deletions

diff --git a/bitbake/ChangeLog b/bitbake/ChangeLog
index 871f260c48..d00a52d2b6 100644
--- a/bitbake/ChangeLog
+++ b/bitbake/ChangeLog
@@ -30,6 +30,9 @@ Changes in BitBake 1.8.x:
         - Add proxy support to the CVS fetcher (from Cyril Chemparathy)
         - Improve runfetchcmd so errors are seen and various GIT variables are exported
         - Add ability to fetchers to check URL validity without downloading
+        - Improve runtime PREFERRED_PROVIDERS warning message
+        - Add BB_STAMP_WHITELIST option which contains a list of stamps to ignore when
+          checking stamp dependencies and using a BB_STAMP_POLICY of "whitelist"
 
 Changes in BitBake 1.8.10:
         - Psyco is available only for x86 - do not use it on other architectures.
diff --git a/bitbake/lib/bb/providers.py b/bitbake/lib/bb/providers.py
index 2f6b620b3d..cb0ca3ff24 100644
--- a/bitbake/lib/bb/providers.py
+++ b/bitbake/lib/bb/providers.py
@@ -283,13 +283,16 @@ def filterProvidersRunTime(providers, item, cfgData, dataCache):
 
     # Should use dataCache.preferred here?
     preferred = []
+    preferred_vars = []
     for p in eligible:
         pn = dataCache.pkg_fn[p]
         provides = dataCache.pn_provides[pn]
         for provide in provides:
             prefervar = bb.data.getVar('PREFERRED_PROVIDER_%s' % provide, cfgData, 1)
             if prefervar == pn:
-                bb.msg.note(2, bb.msg.domain.Provider, "selecting %s to satisfy runtime %s due to PREFERRED_PROVIDERS" % (pn, item))
+                var = "PREFERRED_PROVIDERS_%s = %s" % (provide, prefervar)
+                bb.msg.note(2, bb.msg.domain.Provider, "selecting %s to satisfy runtime %s due to %s" % (pn, item, var))
+                preferred_vars.append(var)
                 eligible.remove(p)
                 eligible = [p] + eligible
                 preferred.append(p)
@@ -297,6 +300,9 @@ def filterProvidersRunTime(providers, item, cfgData, dataCache):
 
     numberPreferred = len(preferred)
 
+    if numberPreferred > 1:
+        bb.msg.error(bb.msg.domain.Provider, "Conflicting PREFERRED_PROVIDERS entries were found which resulted in an attempt to select multiple providers (%s) for runtime dependecy %s\nThe entries resulting in this conflict were: %s" % (preferred, item, preferred_vars))
+
     bb.msg.debug(1, bb.msg.domain.Provider, "sorted providers for %s are: %s" % (item, eligible))
 
     return eligible, numberPreferred
diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index 7b3defd343..3560996b9d 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -150,6 +150,7 @@ class RunQueue:
         self.multi_provider_whitelist = (bb.data.getVar("MULTI_PROVIDER_WHITELIST", cfgData, 1) or "").split()
         self.scheduler = bb.data.getVar("BB_SCHEDULER", cfgData, 1) or "speed"
         self.stamppolicy = bb.data.getVar("BB_STAMP_POLICY", cfgData, 1) or "perfile"
+        self.stampwhitelist = bb.data.getVar("BB_STAMP_WHITELIST", cfgData, 1) or []
 
     def reset_runqueue(self):
 
@@ -667,6 +668,18 @@ class RunQueue:
         #if error:
         #    bb.msg.fatal(bb.msg.domain.RunQueue, "Corrupted metadata configuration detected, aborting...")
 
+
+        # Create a whitelist usable by the stamp checks
+        stampfnwhitelist = []
+        for entry in self.stampwhitelist.split():
+            entryid = self.taskData.getbuild_id(entry)
+            if entryid not in self.taskData.build_targets:
+                continue
+            fnid = self.taskData.build_targets[entryid][0]
+            fn = self.taskData.fn_index[fnid]
+            stampfnwhitelist.append(fn)
+        self.stampfnwhitelist = stampfnwhitelist
+
         #self.dump_data(taskData)
 
     def check_stamps(self):
@@ -679,6 +692,9 @@ class RunQueue:
             fulldeptree = False
         else:
             fulldeptree = True
+            stampwhitelist = []
+            if self.stamppolicy == "whitelist":
+                stampwhitelist = self.self.stampfnwhitelist
 
         for task in range(len(self.runq_fnid)):
             unchecked[task] = ""
@@ -730,7 +746,7 @@ class RunQueue:
                             fn2 = self.taskData.fn_index[self.runq_fnid[dep]]
                             taskname2 = self.runq_task[dep]
                             stampfile2 = "%s.%s" % (self.dataCache.stamp[fn2], taskname2)
-                            if fulldeptree or fn == fn2:
+                            if fn == fn2 or (fulldeptree and fn2 not in stampwhitelist):
                                 if dep in notcurrent:
                                     iscurrent = False
                                 else:
@@ -766,6 +782,9 @@ class RunQueue:
             fulldeptree = False
         else:
             fulldeptree = True
+            stampwhitelist = []
+            if self.stamppolicy == "whitelist":
+                stampwhitelist = self.stampfnwhitelist
 
         fn = self.taskData.fn_index[self.runq_fnid[task]]
         taskname = self.runq_task[task]
@@ -785,7 +804,7 @@ class RunQueue:
                 fn2 = self.taskData.fn_index[self.runq_fnid[dep]]
                 taskname2 = self.runq_task[dep]
                 stampfile2 = "%s.%s" % (self.dataCache.stamp[fn2], taskname2)
-                if fulldeptree or fn == fn2:
+                if fn == fn2 or (fulldeptree and fn2 not in stampwhitelist):
                     try:
                         t2 = os.stat(stampfile2)[stat.ST_MTIME]
                         if t1 < t2: