can't build under freebsd 10
$ ./configure
loading cache ./config.cache
checking for a BSD compatible install... (cached) /usr/bin/install -c
checking whether build environment is sane... yes
checking whether make sets ${MAKE}... (cached) yes
checking for working aclocal... found
checking for working autoconf... found
checking for working automake... found
checking for working autoheader... found
checking for working makeinfo... found
checking whether to enable maintainer-specific portions of Makefiles... no
checking for gcc... (cached) cc
checking whether the C compiler (cc ) works... yes
checking whether the C compiler (cc ) is a cross-compiler... no
checking whether we are using GNU C... (cached) yes
checking whether cc accepts -g... (cached) yes
checking for c++... (cached) c++
checking whether the C++ compiler (c++ ) works... yes
checking whether the C++ compiler (c++ ) is a cross-compiler... no
checking whether we are using GNU C++... (cached) yes
checking whether c++ accepts -g... (cached) yes
checking for gnutar... (cached) tar
checking whether tar is GNU tar... (cached) yes
checking for POSIXized ISC... no
checking how to run the C preprocessor... (cached) cc -E
checking for AIX... no
checking for minix/config.h... (cached) no
checking for cc option to accept ANSI C... (cached) none needed
checking host system type... Invalid configuration amd64-unknown-freebsd10.0': machineamd64-unknown' not recognized
checking build system type... Invalid configuration amd64-unknown-freebsd10.0': machineamd64-unknown' not recognized
checking for ranlib... (cached) ranlib
checking for ld used by GCC... (cached) /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... (cached) yes
checking for BSD-compatible nm... (cached) /usr/bin/nm -B
checking whether ln -s works... (cached) yes
loading cache ./config.cache within ltconfig
ltconfig: you must specify a host type if you use --no-verify'
Tryltconfig --help' for more information.
configure: error: libtool configure failed