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pcg |
1.1 |
dnl Check to find out whether the running kernel has support for TUN/TAP |
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AC_DEFUN(tinc_TUNTAP, |
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[ |
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AC_ARG_WITH(kernel, |
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[ --with-kernel=dir give the directory with kernel sources] |
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[ (default: /usr/src/linux)], |
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kerneldir="$withval", |
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kerneldir="/usr/src/linux" |
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) |
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AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h, |
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[ |
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AC_TRY_COMPILE([#include "$kerneldir/include/linux/if_tun.h"], |
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[int a = IFF_TAP;], |
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if_tun_h="\"$kerneldir/include/linux/if_tun.h\"", |
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[AC_TRY_COMPILE([#include <linux/if_tun.h>], |
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[int a = IFF_TAP;], |
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if_tun_h="default", |
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if_tun_h="no" |
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)] |
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) |
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if test $if_tun_h = no; then |
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tinc_cv_linux_if_tun_h=none |
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else |
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tinc_cv_linux_if_tun_h="$if_tun_h" |
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fi |
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]) |
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if test $tinc_cv_linux_if_tun_h != none; then |
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AC_DEFINE(HAVE_TUNTAP, 1, [Universal tun/tap driver present]) |
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if test $tinc_cv_linux_if_tun_h != default; then |
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AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, $tinc_cv_linux_if_tun_h, [Location of if_tun.h]) |
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fi |
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fi |
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AC_SUBST(LINUX_IF_TUN_H) |
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AC_SUBST(HAVE_TUNTAP) |
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]) |
