diff --git a/poky/meta/classes/archiver.bbclass b/poky/meta/classes/archiver.bbclass
index 31c9b7e..d68add9 100644
--- a/poky/meta/classes/archiver.bbclass
+++ b/poky/meta/classes/archiver.bbclass
@@ -267,6 +267,14 @@
         create_tarball(d, srcdir, 'configured', ar_outdir)
 }
 
+def exclude_useless_paths(tarinfo):
+    if tarinfo.isdir():
+        if tarinfo.name.endswith('/temp') or tarinfo.name.endswith('/patches') or tarinfo.name.endswith('/.pc'):
+            return None
+        elif tarinfo.name == 'temp' or tarinfo.name == 'patches' or tarinfo.name == '.pc':
+            return None
+    return tarinfo
+
 def create_tarball(d, srcdir, suffix, ar_outdir):
     """
     create the tarball from srcdir
@@ -291,7 +299,7 @@
 
     bb.note('Creating %s' % tarname)
     tar = tarfile.open(tarname, 'w:gz')
-    tar.add(srcdir, arcname=os.path.basename(srcdir))
+    tar.add(srcdir, arcname=os.path.basename(srcdir), filter=exclude_useless_paths)
     tar.close()
 
 # creating .diff.gz between source.orig and source
diff --git a/poky/meta/classes/base.bbclass b/poky/meta/classes/base.bbclass
index abb4ead..2a6a6cb 100644
--- a/poky/meta/classes/base.bbclass
+++ b/poky/meta/classes/base.bbclass
@@ -303,7 +303,9 @@
 			if [ "${CLEANBROKEN}" != "1" -a \( -e Makefile -o -e makefile -o -e GNUmakefile \) ]; then
 				oe_runmake clean
 			fi
-			find ${B} -ignore_readdir_race -name \*.la -delete
+			# -ignore_readdir_race does not work correctly with -delete;
+			# use xargs to avoid spurious build failures
+			find ${B} -ignore_readdir_race -name \*.la -type f -print0 | xargs -0 rm -f
 		fi
 	fi
 	if [ -n "${CONFIGURESTAMPFILE}" ]; then
diff --git a/poky/meta/classes/crosssdk.bbclass b/poky/meta/classes/crosssdk.bbclass
index ddb98d2..03b0c60 100644
--- a/poky/meta/classes/crosssdk.bbclass
+++ b/poky/meta/classes/crosssdk.bbclass
@@ -21,10 +21,10 @@
 TARGET_CC_ARCH = "${SDK_CC_ARCH}"
 TARGET_LD_ARCH = "${SDK_LD_ARCH}"
 TARGET_AS_ARCH = "${SDK_AS_ARCH}"
-TARGET_CPPFLAGS = "${BUILD_CPPFLAGS}"
-TARGET_CFLAGS = "${BUILD_CFLAGS}"
-TARGET_CXXFLAGS = "${BUILD_CXXFLAGS}"
-TARGET_LDFLAGS = "${BUILD_LDFLAGS}"
+TARGET_CPPFLAGS = ""
+TARGET_CFLAGS = ""
+TARGET_CXXFLAGS = ""
+TARGET_LDFLAGS = ""
 TARGET_FPU = ""