Default +universal variant for configure-based ports

[Paul Guyot]

On Feb 26, 2007, at 18:58, Ryan Schmidt wrote:

>> You are right. This will not work on 10.3 simply because 10.3  
>> installations are not capable of building universal binaries. I  
>> have just added a warning (we could transform it into an error)  
>> when the +universal variant is selected on machines where the  
>> Universal SDK is not installed. This will cover machines running  
>> 10.3 and incomplete 10.4 installs.
>
> What is the difference between a warning and an error? Are you  
> saying it just prints a message, then tries to continue? How could  
> it succeed if the universal SDK is not present?

Yes, it will try to continue. If the port is tailored in some way,  
this may work even if the SDK isn't present, hence the warning. I  
agree that it could have been made an error.

>> I realize that this code should be modified when Leopard will be  
>> out, for example, we should not specify 10.4 universal SDK on  
>> Leopard if all the libraries there are universal. But I can only  
>> speculate for now.
>
> I do not believe that any such changes would need to be made when  
> Leopard is out. Leopard should be able to run 10.4 universal  
> binaries. And we should continue to make 10.4 universal binaries  
> even when on Leopard, so that any universal binaries that were made  
> there will still run on 10.4. Are we setting  
> MACOSX_DEPLOYMENT_TARGET=10.4? If not, we should be.

Well, on Leopard we might accept to build universal binaries even if  
the user did not install the universal binary SDK.

Paul