for F in $mysubdirs
do
echo "Configuring in $F..."
- (cd $F && grep "^AC_CONFIG_HEADER" configure.in > /dev/null && autoheader -I$parentdir)
+ (cd $F && grep "^AC_CONFIG_HEADER" configure.ac > /dev/null || exit 0; autoheader -I$parentdir)
(cd $F && autoconf -I$parentdir)
done