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Reinstated search for if_tun.h in kernel source tree, because apparently

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/usr/include/linux does not always have the same contents as the include
files from the currently running kernel.
This commit is contained in:
Guus Sliepen 2001-06-21 18:28:52 +00:00
parent 9e96840da8
commit 7fc068fe54
1 changed files with 20 additions and 6 deletions
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26
m4/tuntap.m4
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@ -2,12 +2,26 @@ dnl Check to find out whether the running kernel has support for TUN/TAP
AC_DEFUN(tinc_TUNTAP, AC_DEFUN(tinc_TUNTAP,
[ [
AC_ARG_WITH(kernel,
[ --with-kernel=dir give the directory with kernel sources]
[ (default: /usr/src/linux)],
kerneldir="$withval",
kerneldir="/usr/src/linux"
)
AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h, AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h,
[ AC_TRY_COMPILE([#include <linux/if_tun.h>], [
[int a = IFF_TAP], AC_TRY_COMPILE([#include "$kerneldir/include/linux/if_tun.h"],
if_tun_h="linux/if_tun.h", [int a = IFF_TAP;],
if_tun_h="no") if_tun_h="\"$kerneldir/include/linux/if_tun.h\"",
if test $if_tun_h = no; then [AC_TRY_COMPILE([#include <linux/if_tun.h>],
[int a = IFF_TAP;],
if_tun_h="<linux/if_tun.h>",
if_tun_h="no"
)]
)
if test $if_tun_h = no; then
tinc_cv_linux_if_tun_h=none tinc_cv_linux_if_tun_h=none
else else
tinc_cv_linux_if_tun_h=$if_tun_h tinc_cv_linux_if_tun_h=$if_tun_h
@ -16,7 +30,7 @@ AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h,
if test $tinc_cv_linux_if_tun_h != none; then if test $tinc_cv_linux_if_tun_h != none; then
AC_DEFINE(HAVE_TUNTAP) AC_DEFINE(HAVE_TUNTAP)
AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, "$tinc_cv_linux_if_tun_h") AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, $tinc_cv_linux_if_tun_h)
AC_SUBST(LINUX_IF_TUN_H) AC_SUBST(LINUX_IF_TUN_H)
fi fi
AC_SUBST(HAVE_TUNTAP) AC_SUBST(HAVE_TUNTAP)