=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for u6rd-1.7.1.tar.gz
=> Checksum RMD160 OK for u6rd-1.7.1.tar.gz
===> Installing dependencies for u6rd-1.7.1
===> Overriding tools for u6rd-1.7.1
===> Extracting for u6rd-1.7.1
===> Patching for u6rd-1.7.1
===> Creating toolchain wrappers for u6rd-1.7.1
===> Configuring for u6rd-1.7.1
=> Modifying GNU configure scripts to avoid --recheck
=> Replacing config-guess with pkgsrc versions
=> Replacing config-sub with pkgsrc versions
=> Replacing install-sh with pkgsrc version
creating cache ./config.cache
checking for gcc... cc
checking whether the C compiler (cc -O2 -march=i586 -Wl,-R/usr/pkg/lib) works... yes
checking whether the C compiler (cc -O2 -march=i586 -Wl,-R/usr/pkg/lib) is a cross-compiler... no
checking whether we are using GNU C... yes
checking whether cc accepts -g... yes
checking how to run the C preprocessor... cc -E
checking for a BSD compatible install... /usr/bin/install -c -o root -g operator
checking for net/if_tun.h... no
checking for net/if_utun.h... no
checking for net/tun/if_tun.h... no
checking for linux/if_tun.h... no
configure: error: No supported tunneling device.
*** Error code 1

Stop.
bmake[1]: stopped in /usr/pkgsrc/net/u6rd
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/net/u6rd