python314-devel: add compatibility patch to fix build on macOS <10.12

[aeiouaeiouaeiouaeiouaeiouaeiou]

Closes: https://trac.macports.org/ticket/71608

Description

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 10.6.8 10K549 x86_64
Xcode 4.2 4C199

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL in commit message?
• checked your Portfile with port lint?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?
• checked that the Portfile's most important variants haven't been broken?

[macportsbot]

Notifying maintainers:
@jmroot for port python314-devel.

[aeiouaeiouaeiouaeiouaeiouaeiou]

@jmroot please review these changes. I don't think it will break anything critically, especially since Python 3.14 is still in alpha testing.

[jmroot]

I'm happy to test out changes in the port, but the goal (mine at least) is to get the changes included upstream, so the changes we try here should be exactly the same changes that we propose for adoption upstream. This is why I'm asking to remove #define TARGET_OS_OSX 1 and instead handle it being undefined correctly with the single simplified check.

[aeiouaeiouaeiouaeiouaeiouaeiou]

It seems to be fixed now (for some mystical reason my build couldn't find TargetConditionals.h, perhaps I should reinstall Xcode), however the Trac ticket should be closed too.