/etc/dpkg-cross/ is in dpkg-cross 2.6.13ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/etc/dpkg-cross/cmake/
/etc/dpkg-cross/cmake/CMakeCross.txt
/etc/dpkg-cross/cross-compile.sample
/etc/dpkg-cross/cross-config.alpha
/etc/dpkg-cross/cross-config.amd64
/etc/dpkg-cross/cross-config.arm64
/etc/dpkg-cross/cross-config.armel
/etc/dpkg-cross/cross-config.armhf
/etc/dpkg-cross/cross-config.cache
/etc/dpkg-cross/cross-config.cygwin-i386
/etc/dpkg-cross/cross-config.d/
/etc/dpkg-cross/cross-config.hppa
/etc/dpkg-cross/cross-config.i386
/etc/dpkg-cross/cross-config.m32r
/etc/dpkg-cross/cross-config.m68k
/etc/dpkg-cross/cross-config.mips
/etc/dpkg-cross/cross-config.mipsel
/etc/dpkg-cross/cross-config.powerpc
/etc/dpkg-cross/cross-config.sh
/etc/dpkg-cross/cross-config.sh3
/etc/dpkg-cross/cross-config.sh3eb
/etc/dpkg-cross/cross-config.sh4
/etc/dpkg-cross/cross-config.sh4eb
/etc/dpkg-cross/multiarch-cross.d/
/etc/dpkg-cross/qmake/
/etc/dpkg-cross/qmake/cross/
/etc/dpkg-cross/qmake/cross/features/
/etc/dpkg-cross/qmake/cross/features/link_xpkgconfig.prf
/etc/dpkg-cross/qmake/cross/qmake.conf
/etc/dpkg-cross/qmake/multi/
/etc/dpkg-cross/qmake/multi/qmake.conf