[Mac] Please remind: how do I build the demos and the samples?

[David Goldsmith]

(The instructions @ 
http://www.wxwidgets.org/wiki/index.php/Mac_OS_X_And_Xcode_For_Beginners#Compiling_and_running_the_demos 
aren't working - I get:

david-goldsmiths-powerbook-g4:~/Desktop/wxMac-2.8.3/demos/life dg$ ls 
Makefile.in     game.cpp        life.pro        makefile.gcc    mondrian.xpm
bitmaps         game.h          life.rc         makefile.unx    reader.cpp
breeder.lif     life.bkl        makefile.bcc    makefile.vc     reader.h
dialogs.cpp     life.cpp        makefile.dmc    makefile.wat    samples.inc
dialogs.h       life.h          makefile.dms    mondrian.ico

david-goldsmiths-powerbook-g4:~/Desktop/wxMac-2.8.3/demos/life dg$ make
make: *** No targets specified and no makefile found.  Stop.

)

Thanks!

DG