# AC_PATH_KERNEL_SOURCE(VARIABLE)
# Tries to find path of currently running kernel.
# MUST only be used as a default-value, and user
# should be able to specify --with-kernel-dir=
# --------------------------------------
AC_DEFUN([AC_PATH_KERNEL_SOURCE],
[
AC_MSG_CHECKING([for kernel-source])
if test -r /lib/modules/`uname -r`/build/include/linux/autoconf.h; then
  $1=/lib/modules/`uname -r`/build/
  AC_MSG_RESULT([$$1])
else
 if test -r /usr/src/linux/include/linux/autoconf.h; then
  $1=/usr/src/linux/
  AC_MSG_RESULT([$$1])
 else
  AC_MSG_RESULT([not found])
 fi
fi
])