!IF 0

Sample DIRS file

myoldp is only going to be compiled for x86.

myhello is going to be compiled for x86 and ia64.  

{x86,ia64,32,64} are the availible options.

mysample will only be compiled is specified in the 
build options.

!ENDIF

DIRS=myproject          \
     myoldp{x86}        \
     myhello{x86,ia64}

OPTIONAL_DIRS=mysample