thanks to Kris Van Hees for pointing this out
[ --with-dux-kernel-headers=path use the kernel headers found at path(optional, defaults to first match in /usr/sys)]
)
AC_ARG_WITH(linux-kernel-headers,
-[ --with-linux-kernel-headers=path use the kernel headers found at path(optional, defaults to /usr/src/linux)]
+[ --with-linux-kernel-headers=path use the kernel headers found at path(optional, defaults to /usr/src/linux-2.4, then /usr/src/linux)]
)
AC_ARG_WITH(bsd-kernel-headers,
[ --with-bsd-kernel-headers=path use the kernel headers found at path(optional, defaults to /usr/src/sys)]