libncurses5-dev and libncursesw5-dev are marked as "Multi-Arch: same",
but the following file is architecture-dependent:
[libncurses5-dev 5.9+20130608-1]
usr/include/term.h
9760ae96a80fb5f5f0e877e607609304 kfreebsd-i386 kfreebsd-amd64
d1f01cbc430c886c0b660d5113609fa2 s390 s390x amd64 i386 powerpc sparc armel armhf mips mipsel
[libncursesw5-dev 5.9+20130608-1]
usr/include/ncursesw/term.h
0bdc1f33a436d5c884d423427d0f78c9 s390 s390x amd64 i386 powerpc sparc armel armhf mips mipsel
46be85c85ca3acb057449f5e24b8dac1 kfreebsd-i386 kfreebsd-amd64
Cheers,
Andreas