support x86_64 Objective-C code generation for Leopard

[d0k]

Bugzilla Link	3987
Resolution	FIXED
Resolved on	Jul 29, 2010 17:39
Version	unspecified
OS	MacOS X

Extended Description

$ cat test.m
#import <Foundation/Foundation.h>

@​protocol Foo
@​end

@​interface Test : NSObject
@​end

@​implementation Test
@​end

If this code is compiled with clang in 64 bit mode 'as' complains:

$ clang -m64 test.m
/tmp/cc-USvXbC.s:27:FATAL:symbol: l_OBJC_LABEL_PROTOCOL_$_Foo can't be a weak_definition (currently only supported in section of type coalesced)

The code assembles fine in 32 bit mode.

(I don't know much Objective C so the test case might be reduced further. I've extracted this from transmission)

I'm using OS X 10.5.6 (intel) and clang/llvm r69067.

$ as -v
Apple Inc version cctools-698~13, GNU assembler version 1.38

[llvmbot]

64bit mode uses non-fragile ABI. This ABI cannot be used on Leopard, due to unavailability
of matching cctool.

[llvmbot]

Reopening. This isn't won't fix, but it isn't a current priority. Patches welcome!

[lattner]

Hopefully the integrated assembler will be done and on by default for 2.8 :)

[lattner]

Clang defaults to the integrated assembler now.