Build devel/boost-libs

I'm trying to build the devel/boost-libs on my FreeBSD 10.1.

But I alway get this error

./boost/math/special_functions/detail/lanczos_sse2.hpp:13:10: fatal error:    'emmintrin.h' file not found
#include <emmintrin.h>
         ^
1 error generated.

and

./boost/math/special_functions/detail/lanczos_sse2.hpp:13:10: fatal error: 'emmintrin.h' file not found
#include <emmintrin.h>
         ^
1 error generated.

my config

make showconfig
===> The following configuration options are available for boost-libs-1.55.0_4:
     DEBUG=off: Build with debugging support
     ICU=on: Boost.Regex with ICU unicode support
     OPTIMIZED_CFLAGS=on: Use extra compiler optimizations
     VERBOSE_BUILD=off: Show compiler messages

So what exactly did I miss that I can't build this port successfully?