Linking MingW32 with psapi

Here's something I came across that didn't have a good answer when I googled. If you get link errors with MingW32 like:

undefined reference to `GetProcessMemoryInfo@12' or
c:/justinhj/mem.cpp:55: undefined reference to `EnumProcesses@12'

Then you are not linking with the library psapi, and you need it.

To do this just add -lpsapi to your command line. It needs to be last in the list of libraries too!

Source from http://justinsboringpage.blogspot.com/2009/05/linking-mingw32-with-psapi.html

With Eclipse Helios: you add by going to Project > Properties > C/C++ Build > Settings > MinGW C Linker > Libraries, add psapi to it.