32bit mac non-opt build doesn't work

[graydon]

It appears to have trouble linking.

...
cp: i686-apple-darwin/stage1/lib/rustc/i686-apple-darwin/lib/librustllvm.dylib
compile_and_link: i686-apple-darwin/stage1/lib/rustc/i686-apple-darwin/lib/librustc.dylib
...
LLVM ERROR: Section too large, can't encode r_address (0x10006ad) into 24 bits of scattered relocation entry.
make: *** [i686-apple-darwin/stage1/lib/rustc/i686-apple-darwin/lib/librustc.dylib] Error 1

Possibly related: http://code.google.com/p/go/issues/detail?id=3253

No idea really. It does seem like mach-o has something called a "scattered" reloc, and that this has only a 24bit displacement:

http://developer.apple.com/library/Mac/documentation/DeveloperTools/Conceptual/MachORuntime/Reference/reference.html#//apple_ref/c/tag/scattered_relocation_info

r_address

...

    Since this field is only 24 bits long, the offset in this field can never be larger than 0x00FFFFFF, thus limiting the size of the relocatable contents of this image to 16 megabytes.

Possibly we can fiddle linker and LLVM options to not generate these. Or we can get our codegen improved to the point where none of our libraries are 16+mb, which would be cool.

[brson]

Memory usage is down. Maybe this works now.

[graydon]

It'd be more a matter of the target binaries getting smaller

[huonw]

Triage: we're not testing for this configuration with bors, so I can only assume it's still broken.

[alexcrichton]

Testing locally, we now bootstrap (apparently our memory usage is down). If we want to ensure this doesn't regress we should add a builder with this configuration.

Flagging as A-build for this reason.

[alexcrichton]

This builder has been running for awhile now, closing due to being fixed.