[cmake-developers] Trouble with FindPNG module

[Ben Boeckel]

On Mon, Apr 24, 2017 at 19:58:52 +0100, Roger Leigh wrote:
> While you can install as many of the runtime packages as you like, the 
> headers go into /usr/include and so they conflict with each other, 
> limiting you to a single development package at one time (checked the 
> behaviour to verify this, and installing one triggers removal of any 
> existing variant).  Not itself a multiarch limitation--many packages now 
> use /usr/include/<arch> for this reason--but certainly a limitation in 
> the packaging of the current libpng, which for some reason hasn't yet 
> started using arch-specific headers.

Hmm, odd. Coming from RPM, it copes with multiple -devel packages all
writing directly to `/usr/include` as long as the headers themselves are
the same on all architectures (and, IIRC, binaries are decided based on the
"preferred" architecture of the host in case of conflicts). Oddities in
packaging formats I suppose :) .

--Ben