FS should compile fine on wheezy, I did a post about this 1 month ago, see here;

http://freeswitch-users.2379917.n2.nabble.com/Problem-with-rtp-streams-and-stair-stepped-or-ramped-increased-lag-td7592143i20.html

http://permalink.gmane.org/gmane.comp.telephony.freeswitch.user/62095

See the following instructions;

http://pastebin.com/gCgEmH90

Please attempt to reproduce the error in a clean build environment following the flow shown above.

You also need you make sure you have ia32-libs and fakeroot installed.

Hope this helps, let us know how you get on.