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dnl ######################################################################
dnl ensure that linux kernel headers match running kernel
AC_DEFUN([AMU_LINUX_HEADERS],
[
# test sanity of running kernel vs. kernel headers
AC_MSG_CHECKING("host headers version")
case ${host_os} in
linux )
host_header_version="bad"
AMU_EXPAND_RUN_STRING(
[
#include <stdio.h>
#include <linux/version.h>
],
[
if (argc > 1)
#ifdef UTS_RELEASE
printf("%s", UTS_RELEASE);
#else
# define AMU_MA(a) ((a) >> 16)
# define AMU_MI(a) (((a) & 0xffff) >> 8)
# define AMU_PL(a) ((a) & 0xff)
printf("%d.%d.%d", AMU_MA(LINUX_VERSION_CODE), AMU_MI(LINUX_VERSION_CODE), AMU_PL(LINUX_VERSION_CODE));
#endif
],
[ host_header_version=$value ],
[ echo
AC_MSG_ERROR([cannot find UTS_RELEASE in <linux/version.h>.
This Linux system may be misconfigured or unconfigured!])
])
;;
* ) host_header_version=$host_os_version ;;
esac
AC_DEFINE_UNQUOTED(HOST_HEADER_VERSION, "$host_header_version")
AC_MSG_RESULT($host_header_version)
case ${host_os} in
linux )
if test "$host_os_version" != $host_header_version
then
AC_MSG_WARN([Linux kernel $host_os_version mismatch with $host_header_version headers!])
fi
;;
esac
dnl cache these two for debugging purposes
ac_cv_os_version=$host_os_version
ac_cv_header_version=$host_header_version
])
dnl ======================================================================
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