20 lines
523 B
Text
20 lines
523 B
Text
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_CACHE_CHECK([for linux/if_tun.h], tinc_cv_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="linux/if_tun.h",
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if_tun_h="no")
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if test $if_tun_h = no; then
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tinc_cv_linux_if_tun_h=none
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else
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AC_DEFINE(HAVE_TUNTAP)
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AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, "$if_tun_h")
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AC_SUBST(LINUX_IF_TUN_H)
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tinc_cv_linux_if_tun_h=$if_tun_h
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fi
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AC_SUBST(HAVE_TUNTAP)
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])
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])
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