fix issue 2968 by adding pragma(framework)

[benjones]

For dmd PR: dlang/dmd#10615

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	2968	enhancement	Add a pragma(framework) on osx

[Geod24]

The DMD PR has been closed in favor of linkerDirectives

[adamdruppe]

Just wished I had this again. linkerDirective only works on Windows. framework is a Mac feature.

[kinke]

linkerDirective only works on Windows

That's purely a DMD limitation. pragma({lib,linkerDirective}) work as embedded Mach-O linker directives with LDC, on Windows and Mac.

[adamdruppe]

Alas, extern(Objective-C) doesn't work on ldc, so we're at a useless intersection.

[kinke]

I don't see how that's related - just saying that there's no object-file limitation to make the existing pragmas work with DMD for Mac too, which cover framework use cases and more.

[adamdruppe]

it is related cuz the end goal here requires both, so there's no solution outside patching one or both compilers.

It isn't a difficult patch, but it is hard to realize one's IVY using D when something that was written 14 years ago never got merged cuz "just use this other thing" and said other thing is also broken.