+gccxml $flags -fxml=$gccxmloutput
+if [[ $? != 0 ]]; then
+ echo "Errors running gccxml... aborting."
+ exit
+fi
+
+# now get the list of the #defined values for wx headers, so that the result
+# can be passed to ifacecheck to aid the comparison
+echo "Running gccxml's preprocessor on the $allheaders file... results in $preprocoutput"
+gccxml -E -dM $flags >$preprocoutput
+if [[ $? != 0 ]]; then
+ echo "Errors running gccxml preprocessor... aborting."
+ exit
+fi