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Add checks for the presence of the universal tun/tap device driver.

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This commit is contained in:
Ivo Timmermans 2000-10-15 17:26:31 +00:00
parent 85adeef212
commit 3b455b8f31
3 changed files with 51 additions and 2 deletions
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35
m4/tuntap.m4 Normal file
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dnl Check to find out whether the running kernel has support for TUN/TAP
AC_DEFUN(tinc_TUNTAP,
[
dnl Check for directory with kernel source... (from ALSA)
AC_CACHE_CHECK([for directory with kernel source], tinc_cv_kerneldir,
[ AC_ARG_WITH(kernel,
[ --with-kernel=dir give the directory with kernel sources]
[ (default: /usr/src/linux)],
kerneldir="$withval", kerneldir="/usr/src/linux")
AC_DEFINE_UNQUOTED(CONFIG_TINC_KERNELDIR, "$kerneldir")
CONFIG_TINC_KERNELDIR="$kerneldir"
AC_SUBST(CONFIG_TINC_KERNELDIR)
AC_MSG_RESULT($kerneldir)
])
AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h,
[ AC_TRY_COMPILE([linux/if_tun.h],
[int a = IFF_TAP],
if_tun_h="linux/if_tun.h",
[ AC_TRY_COMPILE([$kerneldir/include/linux/if_tun.h],
[int a = IFF_TAP],
if_tun_h="$kerneldir/include/linux/if_tun.h",
if_tun_h="no")
])
if test $if_tun_h = no; then
AC_MSG_RESULT(none)
else
AC_DEFINE(HAVE_TUNTAP)
AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, "$if_tun_h")
AC_SUBST(LINUX_IF_TUN_H)
AC_MSG_RESULT($if_tun_h)
fi
AC_SUBST(HAVE_TUNTAP)
])
])