OS X Universal Binary Support

[ashgti]

On OS X a number of libraries are built universally. At the very least, it would be nice to tell rustc if your planning on targeting 32 or 64 bit in case your building against a library that is currently only available as one or the other. Currently, I think the only way of doing this is to specify a host triple at compile time and build the entire system as one or the other. It would be nice to be able to build universally on OS X and support targeting a specific architecture. The gcc and clang both support -m32 or -m64 as a simple solution to specifying the architecture, as well as -arch flags.

With clang and gcc -arch can be used to specify which architectures you want to build for, for example clang foo.c -o foo.o -arch i386 -arch x86_64 -arch ppc will tell the compiler to build a binary that supports 3 different architectures.

[catamorphism]

Looks like #2084 blocks this.

[cooljeanius]

Is this still non-universal? The MacPorts port for Rust includes a +universal variant, and I'm just wondering if it does anything, or if I should remove it.

[cooljeanius]

(and by "or if I should remove it", I actually mean "or if I should have @g5pw remove it".)

[bstrie]

It's been a year, and I don't own a mac. Is 32-bit support still relevant? What range of OS X does Rust support?

[cooljeanius]

What range of OS X does Rust support?

10.6+

[larryv]

Can’t you target 32-bit by specifying --target-triples=i686-apple-darwin when building Rust and --target=i686-apple-darwin when using rustc?

[catamorphism]

By the way, it seems that the highest version of Mac OS X that a PPC Mac can run is 10.5.8, and since we don't support anything < 10.6 anyway, we don't need to worry about PPC. IA32, however, can run 10.6.8. Not sure how important it is.

[catamorphism]

Nominating for milestone 3, feature-complete

[graydon]

just a bug, removing milestone/nomination.

[thestinger]

Still an issue, but it feels like we're not going to implement this by the time Apple drops support for Snow Leopard anyway

[emberian]

Still an issue. I feel like it's pretty unimportant ATM.

[athei]

With the upcoming transition to Apple Silicon it might become important to support Univeral Binaries.