title: How to specify include directory for configure script
body: <p>I have a linux system at my workplace with pretty old packages and no root access. I'm compiling packages that I need from source with <code>--prefix=[somewhere in homedir]</code>. My problem is that I just can't find out how to convince configure to look for header files in a specific directory. The source is cpp. I tried with environment variables related to <code>g++</code> and looking up flags and googling but I had no success. Can someone help me solve this? </p>