37 lines
1.2 KiB
Text
37 lines
1.2 KiB
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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dnl Check for directory with kernel source... (from ALSA)
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AC_CACHE_CHECK([for directory with kernel source], tinc_cv_kerneldir,
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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="$withval", kerneldir="/usr/src/linux")
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AC_DEFINE_UNQUOTED(CONFIG_TINC_KERNELDIR, "$kerneldir")
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CONFIG_TINC_KERNELDIR="$kerneldir"
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AC_SUBST(CONFIG_TINC_KERNELDIR)
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AC_MSG_RESULT($kerneldir)
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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 $if_tun_h = no; then
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AC_TRY_COMPILE([#include "$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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if_tun_h="no")
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fi
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if test $if_tun_h = no; then
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AC_MSG_RESULT(none)
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else
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AC_DEFINE(HAVE_TUNTAP)
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AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, "$if_tun_h")
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AC_SUBST(LINUX_IF_TUN_H)
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AC_MSG_RESULT($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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