Re: complex gmake conditionals: NOT ( ifndef(arg1) AND ifdef(arg2) )

[Noel Yap]

Boris Kolpackov wrote:

> <address@hidden> writes:
>  
>
> > But what do I do with something like
> >
> >         #if ! ( (defined ( val3 ) ) || ( ! defined (val4) ) )
> >         key2 val5
> >         #endif
>
> ifeq ($(val3)$(if $(val4),,t),)

I created logical functions (ie and, not, or, xor) to make this kind of thing a 
little more legible so the above becomes:

ifneq ($(call logical-not,$(call logical-or,$(val3),$(call 
logical-not,$(val4)))),)     # I did say a /little/ more legible.  OTOH, it may 
be less legible depending on your tastes.
endif

or, if you want it simplified:

ifneq ($(call logical-and,$(call logical-not,$(val3)),$(val4)),)
endif

I'll leave it as an exercize to the reader to implement them for themselves :-)

Noel