The package seems to fail on all 64-bit architectures that are not
x86_64 because the define __LP64__ is used to decide whether the SSE2
specific header emmintrin.h is available.
However, __LP64__ is defined on all 64 pit archs and not only on
x86_64.
On Debian replacing all instances of __LP64__ with __SSE2__ would
probably do the trick, although I'm not sure whether __LP64__ is only
used to decide about the us of SSE2, i.e. the code may still fail on
other 64 bit archs, but then for other reasons.
For upstream the solution should be somewhat different, because they
also support the MS visual studio compiler that doesn't define __LP64__
nor __SSE2__.
