Apt-get is unable to get it, although I see that there is libasound2 installed, which is the same thing. I am trying to compile vlc from source, and it requires alsa-lib. Perhaps I could somehow use libasound2?
If you want to compile something from source that links to a specific library, you also need the appropriate header files (
#include ...). These are not included when the library is installed since they're only needed when compiling; instead, they come in small associated "development" packages.
On Raspbian these have a
> apt-cache search libasound [...] libasound2-dev - shared library for ALSA applications -- development files
That's probably what you need.