diff --git a/poky/meta/lib/oe/buildhistory_analysis.py b/poky/meta/lib/oe/buildhistory_analysis.py
index b185684..4edad01 100644
--- a/poky/meta/lib/oe/buildhistory_analysis.py
+++ b/poky/meta/lib/oe/buildhistory_analysis.py
@@ -562,7 +562,7 @@
                 elif not hash2 in hashfiles:
                     out.append("Unable to find matching sigdata for %s with hash %s" % (desc, hash2))
                 else:
-                    out2 = bb.siggen.compare_sigfiles(hashfiles[hash1], hashfiles[hash2], recursecb, collapsed=True)
+                    out2 = bb.siggen.compare_sigfiles(hashfiles[hash1]['path'], hashfiles[hash2]['path'], recursecb, collapsed=True)
                     for line in out2:
                         m = hashlib.sha256()
                         m.update(line.encode('utf-8'))
diff --git a/poky/meta/lib/oe/package.py b/poky/meta/lib/oe/package.py
index f69bf9c..9a465ea 100644
--- a/poky/meta/lib/oe/package.py
+++ b/poky/meta/lib/oe/package.py
@@ -1239,7 +1239,7 @@
         oe.utils.multiprocess_launch(oe.package.runstrip, sfiles, d)
 
     # Build "minidebuginfo" and reinject it back into the stripped binaries
-    if d.getVar('PACKAGE_MINIDEBUGINFO') == '1':
+    if bb.utils.contains('DISTRO_FEATURES', 'minidebuginfo', True, False, d):
         oe.utils.multiprocess_launch(inject_minidebuginfo, list(elffiles), d,
                                      extraargs=(dvar, dv, d))
 
diff --git a/poky/meta/lib/oe/package_manager/ipk/__init__.py b/poky/meta/lib/oe/package_manager/ipk/__init__.py
index e6f9c08..8fcbad5 100644
--- a/poky/meta/lib/oe/package_manager/ipk/__init__.py
+++ b/poky/meta/lib/oe/package_manager/ipk/__init__.py
@@ -133,7 +133,7 @@
         tmp_dir = tempfile.mkdtemp()
         current_dir = os.getcwd()
         os.chdir(tmp_dir)
-        data_tar = 'data.tar.xz'
+        data_tar = 'data.tar.zst'
 
         try:
             cmd = [ar_cmd, 'x', pkg_path]
@@ -505,6 +505,6 @@
                      "trying to extract the package."  % pkg)
 
         tmp_dir = super(OpkgPM, self).extract(pkg, pkg_info)
-        bb.utils.remove(os.path.join(tmp_dir, "data.tar.xz"))
+        bb.utils.remove(os.path.join(tmp_dir, "data.tar.zst"))
 
         return tmp_dir
diff --git a/poky/meta/lib/oe/packagedata.py b/poky/meta/lib/oe/packagedata.py
index 162ff60..2d1d6dd 100644
--- a/poky/meta/lib/oe/packagedata.py
+++ b/poky/meta/lib/oe/packagedata.py
@@ -116,6 +116,21 @@
 
     return pkgmap(d).get(pkg)
 
+def foreach_runtime_provider_pkgdata(d, rdep, include_rdep=False):
+    pkgdata_dir = d.getVar("PKGDATA_DIR")
+    possibles = set()
+    try:
+        possibles |= set(os.listdir("%s/runtime-rprovides/%s/" % (pkgdata_dir, rdep)))
+    except OSError:
+        pass
+
+    if include_rdep:
+        possibles.add(rdep)
+
+    for p in sorted(list(possibles)):
+        rdep_data = read_subpkgdata(p, d)
+        yield p, rdep_data
+
 def get_package_mapping(pkg, basepkg, d, depversions=None):
     import oe.packagedata
 
@@ -317,7 +332,7 @@
             for p in bb.utils.explode_deps(rprov):
                 subdata_sym = pkgdatadir + "/runtime-rprovides/%s/%s" % (p, pkg)
                 bb.utils.mkdirhier(os.path.dirname(subdata_sym))
-                oe.path.symlink("../../runtime/%s" % pkg, subdata_sym, True)
+                oe.path.relsymlink(subdata_file, subdata_sym, True)
 
         allow_empty = d.getVar('ALLOW_EMPTY:%s' % pkg)
         if not allow_empty:
@@ -328,7 +343,7 @@
         if g or allow_empty == "1":
             # Symlinks needed for reverse lookups (from the final package name)
             subdata_sym = pkgdatadir + "/runtime-reverse/%s" % pkgval
-            oe.path.symlink("../runtime/%s" % pkg, subdata_sym, True)
+            oe.path.relsymlink(subdata_file, subdata_sym, True)
 
             packagedfile = pkgdatadir + '/runtime/%s.packaged' % pkg
             open(packagedfile, 'w').close()
diff --git a/poky/meta/lib/oe/patch.py b/poky/meta/lib/oe/patch.py
index e4bb5a7..d5ad4f3 100644
--- a/poky/meta/lib/oe/patch.py
+++ b/poky/meta/lib/oe/patch.py
@@ -478,7 +478,7 @@
                             patchlines = []
                             outfile = None
                             try:
-                                with open(srcfile, 'r', encoding=encoding) as f:
+                                with open(srcfile, 'r', encoding=encoding, newline='') as f:
                                     for line in f:
                                         if line.startswith(GitApplyTree.patch_line_prefix):
                                             outfile = line.split()[-1].strip()
diff --git a/poky/meta/lib/oe/path.py b/poky/meta/lib/oe/path.py
index e2f1913..5d21cdc 100644
--- a/poky/meta/lib/oe/path.py
+++ b/poky/meta/lib/oe/path.py
@@ -172,6 +172,9 @@
         if e.errno != errno.EEXIST or os.readlink(destination) != source:
             raise
 
+def relsymlink(target, name, force=False):
+    symlink(os.path.relpath(target, os.path.dirname(name)), name, force=force)
+
 def find(dir, **walkoptions):
     """ Given a directory, recurses into that directory,
     returning all files as absolute paths. """
diff --git a/poky/meta/lib/oe/prservice.py b/poky/meta/lib/oe/prservice.py
index 2f2a0c1..c41242c 100644
--- a/poky/meta/lib/oe/prservice.py
+++ b/poky/meta/lib/oe/prservice.py
@@ -78,8 +78,7 @@
     bb.utils.mkdirhier(d.getVar('PRSERV_DUMPDIR'))
     df = d.getVar('PRSERV_DUMPFILE')
     #write data
-    lf = bb.utils.lockfile("%s.lock" % df)
-    with open(df, "a") as f:
+    with open(df, "a") as f, bb.utils.fileslocked(["%s.lock" % df]) as locks:
         if metainfo:
             #dump column info
             f.write("#PR_core_ver = \"%s\"\n\n" % metainfo['core_ver']);
@@ -113,7 +112,6 @@
             if not nomax:
                 for i in idx:
                     f.write("PRAUTO_%s_%s = \"%s\"\n" % (str(datainfo[idx[i]]['version']),str(datainfo[idx[i]]['pkgarch']),str(datainfo[idx[i]]['value'])))
-    bb.utils.unlockfile(lf)
 
 def prserv_check_avail(d):
     host_params = list([_f for _f in (d.getVar("PRSERV_HOST") or '').split(':') if _f])
diff --git a/poky/meta/lib/oe/recipeutils.py b/poky/meta/lib/oe/recipeutils.py
index 25b159b..de1fbdd 100644
--- a/poky/meta/lib/oe/recipeutils.py
+++ b/poky/meta/lib/oe/recipeutils.py
@@ -26,7 +26,7 @@
 # Help us to find places to insert values
 recipe_progression = ['SUMMARY', 'DESCRIPTION', 'HOMEPAGE', 'BUGTRACKER', 'SECTION', 'LICENSE', 'LICENSE_FLAGS', 'LIC_FILES_CHKSUM', 'PROVIDES', 'DEPENDS', 'PR', 'PV', 'SRCREV', 'SRC_URI', 'S', 'do_fetch()', 'do_unpack()', 'do_patch()', 'EXTRA_OECONF', 'EXTRA_OECMAKE', 'EXTRA_OESCONS', 'do_configure()', 'EXTRA_OEMAKE', 'do_compile()', 'do_install()', 'do_populate_sysroot()', 'INITSCRIPT', 'USERADD', 'GROUPADD', 'PACKAGES', 'FILES', 'RDEPENDS', 'RRECOMMENDS', 'RSUGGESTS', 'RPROVIDES', 'RREPLACES', 'RCONFLICTS', 'ALLOW_EMPTY', 'populate_packages()', 'do_package()', 'do_deploy()', 'BBCLASSEXTEND']
 # Variables that sometimes are a bit long but shouldn't be wrapped
-nowrap_vars = ['SUMMARY', 'HOMEPAGE', 'BUGTRACKER', r'SRC_URI\[(.+\.)?md5sum\]', r'SRC_URI\[(.+\.)?sha256sum\]']
+nowrap_vars = ['SUMMARY', 'HOMEPAGE', 'BUGTRACKER', r'SRC_URI\[(.+\.)?md5sum\]', r'SRC_URI\[(.+\.)?sha[0-9]+sum\]']
 list_vars = ['SRC_URI', 'LIC_FILES_CHKSUM']
 meta_vars = ['SUMMARY', 'DESCRIPTION', 'HOMEPAGE', 'BUGTRACKER', 'SECTION']
 
@@ -664,17 +664,21 @@
     return (appendpath, pathok)
 
 
-def bbappend_recipe(rd, destlayerdir, srcfiles, install=None, wildcardver=False, machine=None, extralines=None, removevalues=None, redirect_output=None, params=None):
+def bbappend_recipe(rd, destlayerdir, srcfiles, install=None, wildcardver=False, machine=None, extralines=None, removevalues=None, redirect_output=None, params=None, update_original_recipe=False):
     """
     Writes a bbappend file for a recipe
     Parameters:
         rd: data dictionary for the recipe
         destlayerdir: base directory of the layer to place the bbappend in
             (subdirectory path from there will be determined automatically)
-        srcfiles: dict of source files to add to SRC_URI, where the value
+        srcfiles: dict of source files to add to SRC_URI, where the key
             is the full path to the file to be added, and the value is a
-            dict with 'path' key containing the original filename as it
-            would appear in SRC_URI or None if it isn't already present.
+            dict with following optional keys:
+                path: the original filename as it would appear in SRC_URI
+                    or None if it isn't already present.
+                patchdir: the patchdir parameter
+                newname: the name to give to the new added file. None to use
+                    the default value: basename(path)
             You may pass None for this parameter if you simply want to specify
             your own content via the extralines parameter.
         install: dict mapping entries in srcfiles to a tuple of two elements:
@@ -697,18 +701,29 @@
         params:
             Parameters to use when adding entries to SRC_URI. If specified,
             should be a list of dicts with the same length as srcfiles.
+        update_original_recipe:
+            Force to update the original recipe instead of creating/updating
+            a bbapend. destlayerdir must contain the original recipe
     """
 
     if not removevalues:
         removevalues = {}
 
-    # Determine how the bbappend should be named
-    appendpath, pathok = get_bbappend_path(rd, destlayerdir, wildcardver)
-    if not appendpath:
-        bb.error('Unable to determine layer directory containing %s' % recipefile)
-        return (None, None)
-    if not pathok:
-        bb.warn('Unable to determine correct subdirectory path for bbappend file - check that what %s adds to BBFILES also matches .bbappend files. Using %s for now, but until you fix this the bbappend will not be applied.' % (os.path.join(destlayerdir, 'conf', 'layer.conf'), os.path.dirname(appendpath)))
+    recipefile = rd.getVar('FILE')
+    if update_original_recipe:
+        if destlayerdir not in recipefile:
+            bb.error("destlayerdir %s doesn't contain the original recipe (%s), cannot update it" % (destlayerdir, recipefile))
+            return (None, None)
+
+        appendpath = recipefile
+    else:
+        # Determine how the bbappend should be named
+        appendpath, pathok = get_bbappend_path(rd, destlayerdir, wildcardver)
+        if not appendpath:
+            bb.error('Unable to determine layer directory containing %s' % recipefile)
+            return (None, None)
+        if not pathok:
+            bb.warn('Unable to determine correct subdirectory path for bbappend file - check that what %s adds to BBFILES also matches .bbappend files. Using %s for now, but until you fix this the bbappend will not be applied.' % (os.path.join(destlayerdir, 'conf', 'layer.conf'), os.path.dirname(appendpath)))
 
     appenddir = os.path.dirname(appendpath)
     if not redirect_output:
@@ -753,7 +768,7 @@
             bbappendlines.append((varname, op, value))
 
     destsubdir = rd.getVar('PN')
-    if srcfiles:
+    if not update_original_recipe and srcfiles:
         bbappendlines.append(('FILESEXTRAPATHS:prepend', ':=', '${THISDIR}/${PN}:'))
 
     appendoverride = ''
@@ -766,16 +781,30 @@
         for i, (newfile, param) in enumerate(srcfiles.items()):
             srcurientry = None
             if not 'path' in param or not param['path']:
-                srcfile = os.path.basename(newfile)
+                if 'newname' in param and param['newname']:
+                    srcfile = param['newname']
+                else:
+                    srcfile = os.path.basename(newfile)
                 srcurientry = 'file://%s' % srcfile
+                oldentry = None
+                for uri in rd.getVar('SRC_URI').split():
+                    if srcurientry in uri:
+                        oldentry = uri
                 if params and params[i]:
                     srcurientry = '%s;%s' % (srcurientry, ';'.join('%s=%s' % (k,v) for k,v in params[i].items()))
                 # Double-check it's not there already
                 # FIXME do we care if the entry is added by another bbappend that might go away?
                 if not srcurientry in rd.getVar('SRC_URI').split():
                     if machine:
+                        if oldentry:
+                            appendline('SRC_URI:remove%s' % appendoverride, '=', ' ' + oldentry)
                         appendline('SRC_URI:append%s' % appendoverride, '=', ' ' + srcurientry)
                     else:
+                        if oldentry:
+                            if update_original_recipe:
+                                removevalues['SRC_URI'] = oldentry
+                            else:
+                                appendline('SRC_URI:remove', '=', oldentry)
                         appendline('SRC_URI', '+=', srcurientry)
                 param['path'] = srcfile
             else:
@@ -800,6 +829,8 @@
         # multiple times per operation when we're handling overrides)
         if os.path.exists(appendpath) and not os.path.exists(outfile):
             shutil.copy2(appendpath, outfile)
+    elif update_original_recipe:
+        outfile = recipefile
     else:
         bb.note('Writing append file %s' % appendpath)
         outfile = appendpath
diff --git a/poky/meta/lib/oe/sstatesig.py b/poky/meta/lib/oe/sstatesig.py
index e250f51..1b4380f 100644
--- a/poky/meta/lib/oe/sstatesig.py
+++ b/poky/meta/lib/oe/sstatesig.py
@@ -349,7 +349,6 @@
            pn, taskname = key.split(':', 1)
 
     hashfiles = {}
-    filedates = {}
 
     def get_hashval(siginfo):
         if siginfo.endswith('.siginfo'):
@@ -357,6 +356,9 @@
         else:
             return siginfo.rpartition('.')[2]
 
+    def get_time(fullpath):
+        return os.stat(fullpath).st_mtime
+
     # First search in stamps dir
     localdata = d.createCopy()
     localdata.setVar('MULTIMACH_TARGET_SYS', '*')
@@ -372,24 +374,21 @@
     filespec = '%s.%s.sigdata.*' % (stamp, taskname)
     foundall = False
     import glob
+    bb.debug(1, "Calling glob.glob on {}".format(filespec))
     for fullpath in glob.glob(filespec):
         match = False
         if taskhashlist:
             for taskhash in taskhashlist:
                 if fullpath.endswith('.%s' % taskhash):
-                    hashfiles[taskhash] = fullpath
+                    hashfiles[taskhash] = {'path':fullpath, 'sstate':False, 'time':get_time(fullpath)}
                     if len(hashfiles) == len(taskhashlist):
                         foundall = True
                         break
         else:
-            try:
-                filedates[fullpath] = os.stat(fullpath).st_mtime
-            except OSError:
-                continue
             hashval = get_hashval(fullpath)
-            hashfiles[hashval] = fullpath
+            hashfiles[hashval] = {'path':fullpath, 'sstate':False, 'time':get_time(fullpath)}
 
-    if not taskhashlist or (len(filedates) < 2 and not foundall):
+    if not taskhashlist or (len(hashfiles) < 2 and not foundall):
         # That didn't work, look in sstate-cache
         hashes = taskhashlist or ['?' * 64]
         localdata = bb.data.createCopy(d)
@@ -398,6 +397,9 @@
             localdata.setVar('TARGET_VENDOR', '*')
             localdata.setVar('TARGET_OS', '*')
             localdata.setVar('PN', pn)
+            # gcc-source is a special case, same as with local stamps above
+            if pn.startswith("gcc-source"):
+                localdata.setVar('PN', "gcc")
             localdata.setVar('PV', '*')
             localdata.setVar('PR', '*')
             localdata.setVar('BB_TASKHASH', hashval)
@@ -409,24 +411,18 @@
                 localdata.setVar('SSTATE_EXTRAPATH', "${NATIVELSBSTRING}/")
             filespec = '%s.siginfo' % localdata.getVar('SSTATE_PKG')
 
+            bb.debug(1, "Calling glob.glob on {}".format(filespec))
             matchedfiles = glob.glob(filespec)
             for fullpath in matchedfiles:
                 actual_hashval = get_hashval(fullpath)
                 if actual_hashval in hashfiles:
                     continue
-                hashfiles[hashval] = fullpath
-                if not taskhashlist:
-                    try:
-                        filedates[fullpath] = os.stat(fullpath).st_mtime
-                    except:
-                        continue
+                hashfiles[actual_hashval] = {'path':fullpath, 'sstate':True, 'time':get_time(fullpath)}
 
-    if taskhashlist:
-        return hashfiles
-    else:
-        return filedates
+    return hashfiles
 
 bb.siggen.find_siginfo = find_siginfo
+bb.siggen.find_siginfo_version = 2
 
 
 def sstate_get_manifest_filename(task, d):