Adding options framework variables that depend on variables coming after bsd.port.pre.mk

[Naram Qashat]

> On 23 Mar, Naram Qashat wrote:
>> I'm wanting to add an options framework LIB_DEPENDS that depends on
>> variables that normally come after bsd.port.pre.mk.
>>
>> In this case, I am trying to add a UTEMPTER_LIB_DEPENDS on
>> sysutils/libutempter, but I want to check OPSYS and OSVERSION
>> beforehand,
>> since base FreeBSD 9.x contains utempter while any earlier FreeBSDs as
>> well as non-FreeBSD OSes don't contain it and need the port.
>>
>> I cannot place the UTEMPTER_LIB_DEPENDS line after bsd.port.pre.mk
>> because
>> the options framework doesn't see it then, but I also cannot wrap it
>> around an if conditional using OPSYS and OSVERSION before
>> bsd.port.pre.mk
>> because those variables aren't set yet.
>>
>> I've been told that there is a workaround, but I was not told what the
>> workaround was. Does anyone know how this can be acomplished?
>
> Maybe something like:
>
> UTEMPTER_LIB_DEPENDS=${FOO}
>
> .include <bsd.port.pre.mk>
>
> .if ${OPSYS} ... && ${OSVERSION} ...
> FOO=	what you want to add to LIB_DEPENDS
> .endif

That worked perfectly, thanks!