check if .depend contains WORKDIR paths -> delete if not

classes/elphel-dev.bbclass

@@ -55,12 +55,40 @@ EXTRA_OEMAKE = " \
                 INITSTRING='${INITSTRING}' \
                 "
 
+do_clean_append() {
+
+    import os.path
+
+    VPATH = d.getVar("VPATH")
+    dfile = os.path.join(VPATH,"src/.depend")
+
+    if os.path.exists(dfile):
+        os.remove(dfile)
+
+}
+
 do_compile_prepend() {
     echo "SRCREV is ${SRCREV}"
     if [ ! -f Makefile ]; then
         echo "Nothing to compile (missing a Makefile)"
         exit 1
     fi
+
+    # need to deal with .depend here
+
+    DEPEND_FILE="${VPATH}/src/.depend"
+
+    # Poky does not like non-zero exit codes,
+    # look for matching lines - if empty string returned - remove .depend
+    TEST_STR=`grep -r "${WORKDIR}" ${DEPEND_FILE} | cat`
+
+    if [ -f $DEPEND_FILE ]; then
+      if [ -z "${TEST_STR}" ]; then
+        echo "This package version has been updated to ${PE}.${PV}.${PR}. Removing ${DEPEND_FILE} before compiling."
+        rm ${DEPEND_FILE}
+      fi
+    fi
+
 }
 
 do_install_append() {