CMake multiarch installation

[Nico Schlömer <nico.schloemer@gmail.com>]

Hi all,

I'm trying to get a Debian package multiarch ready, and I'm trying to
understand how this works. I'm talking about a CMake-built software
here, and unfortunately as of now, the libraries always get installed
into /usr/lib/ instead of /usr/lib/x86_64-linux-gnu/ (on amd64).
Another CMake-based project that I maintain does do the right thing,
cf. <https://launchpadlibrarian.net/174590684/buildlog_ubuntu-trusty-amd64.netcdfc_1%3A4.3.3~20140506-trusty1_UPLOADING.txt.gz>.,
but I don't understand why.
Does anyone have hints about how Debian manages to slip in the
"x86_64-linux-gnu" part in the library install path?

Cheers,
Nico