Re: ifneq inside a function

[Ken Smith]

On Thu, Aug 26, 2004 at 04:14:23PM -0400, Paul D. Smith wrote:
> %% Ken Smith <address@hidden> writes:
> 
>   ks> I can't justify to myself why this makefile
>   ks> define something
>   ks>   ifneq (,)
>   ks>     $(warning weird)
>   ks>   endif
>   ks> endef
> 
>   ks> $(call something)
> 
>   ks> generates the following output
> 
>   ks> testcase.mk:6: weird
>   ks> testcase.mk:6: *** missing separator.  Stop.
> 
> The expansion of every variable and function must result in a single
> line.  You cannot expand into multiple lines.
> 
> There are two exceptions to this rule: first, you can expand into
> multiple lines within a command script, so something like this works:
> 
>     define FOO
>         @echo hello
>         @echo world
>     endef
> 
>     foo:
>             $(FOO)
> 
> And second, the argument to the special $(eval ...) function can contain
> multiple lines.
> 
> 
> No other expansion can result in multiple lines being produced.

This clarifies things considerably.  Thank you both for your help.

-- 
Ken Smith