[Lazarus] Compiler Options - Conditionally add a package dependency?

[Marcos Douglas]

On Thu, Jul 9, 2015 at 12:58 PM, Michael Van Canneyt
<michael at freepascal.org> wrote:
>
>
> On Thu, 9 Jul 2015, Graeme Geldenhuys wrote:
>
>> Hi,
>>
>> I have two independent packages. I would like my project to toggle
>> between either one (but never both at the same time). Both have a unit
>> with the exact same name, hence both packages can't be added to the
>> dependency list at the same time.
>>
>> Is there a way with the Compiler Options -> Other (or Additions and
>> Overrides) to include a specific package based on a compiler define?
>>
>> eg:
>>  if defined UsePackageA
>>    PackageDependecy.Add(PackageA)
>>  else
>>    PackageDependency.Add(PackageB)
>>
>> Well something like that at least.
>
>
> I would even go further, and have a package included or not depending on the
> OS.
> Similar, I think it should be possible to include a unit in a package,
> depending on the OS.
>
> In short, a set of conditions for package dependencies and contains lists.

I would even go further even more:
If we have two units with the same name, would be better if were
possible to create an alias namespace for each unit, like C# does.

https://msdn.microsoft.com/en-us/library/aa664765(v=vs.71).aspx

But you, guys, will talk about "an Unit is a namespace" -- we know
this is true -- and this is not necessary... anyway.

Best regards,
Marcos Douglas