complex conditionals

[Buonopane, Robert]

Hi:

I am using gmake 2.8 but have docs for 2.8.1.

2.8.1 states:

 

     conditional-directive

     text-if-one-is-true

     else conditional-directive

     text-if-true

     else

     text-if-false

     endif

 

but this does not seem to work with my 2.8.

Is this structure a new feature in 2.8.1 or am I doing something wrong.

 

Thanks

Bob