Depending on other ports with OPTIONS

[Adam Weinberger]

Paul A. Hoadley wrote:
> On Sat, Apr 23, 2005 at 04:47:16PM +0930, Paul A. Hoadley wrote:
> 
>>On Fri, Apr 22, 2005 at 11:31:43PM -0700, Kris Kennaway wrote:
>>
>>
>>>The solution is to make a slave port that enables the option you
>>>need, depend on that, and make it conflict with the other
>>>non-enabled versions of the port.
>>
>>Just bear with me for a few more minutes...  So the approach would
>>be to make refdb-mysql, refdb-pgsql and refdb-sqlite, each of which
>>depend on the appropriate libdbi-driver, and refdb with common code?
>>How do I make these slaves conflict with the non-enabled versions of
>>libdbi-drivers---that is, how does
>>"CONFLICTS=libdbi-drivers-0.7.1_2" differentiate between having
>>chosen, say, libmysql or libpgsql when it was built?  Or have I
>>misunderstood your advice?
> 
> 
> I've hit a wall here---can anyone give me a push in the right
> direction?  Even just pointing me at a port that depends on certain
> OPTIONs having been chosen in another port would probably be
> sufficient.  I am willing to work it out from the Makefiles.

Really, the simplest thing is to determine whether someone has installed 
the proper flavour (for example, look for mysql-backend.file). If not, 
output an error message saying "Rebuild port foo with the mysql-backend 
enabled". I bet that'd be enough for most users.

# Adam


-- 
Adam Weinberger
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