portfile test for macosx 10.6.8 + libc++

[Ryan Schmidt]

On Jul 19, 2016, at 8:25 AM, Ken Cunningham wrote:

> Perfect. Thanks!
> 
> There are a series of EFI32 machines stuck at 10.6.8 or at most 10.7. These can be EFI-hacked to run 10.11 but that hasn't worked for me yet.
> 
> I have found that almost any port I have tried to install can be installed on this system (so far), with minor surgery to replace a missing function or two (strnlen and getline being the two most common) and often replacing a few missing libraries or missing includes to fix errors during the build.
> 
> My goal would be to suggest minor mods to portfiles to allow others to do the same if they choose -- and perhaps to leverage this to similar systems (10.7 and 10.8 libc++) if it's easy to do so.

Those issues you mentioned don't sound like they should be conditionalized in the portfile. If software wants to use functions like strnlen or getline which are not on all systems, the software should check for the existence of those functions in its configure script, and if not available, define and use suitable alternatives. Missing libraries or includes similarly sound like something that should affect all systems. If any conditionalizing needs to be done, it should be done in the project's build system, not the MacPorts portfile, since the problem is not unique to MacPorts.