no -mthumb-interwork support for ld in an arm-thumb cross-compiler toolset

[Marshall Ward]

I'm ashamed for writing this because I don't think it's a bug, but I 
can't possibly think what I could be doing wrong and wanted to mention 
it just in case. I'm trying to build binutils-2.16.1 on a Mac G4 
Powerbook (powerpc-apple-darwin7.9.0) and I'm trying to make it an ARM 
cross-compiler with THUMB opcode support. Specifically, here is my 
configure:
 ../configure --prefix=/arm --target=arm-thumb-elf --enable-interwork 
--enable-multilib
The build is successful and I can use the linker, arm-thumb-elf-ld to 
produce ARM opcode. But when I try to link using the interworking tag,
 arm-thumb-elf-ld --mthumb-interwork (+ other stuff)

I get the following error message:

 arm-thumb-elf-ld: unrecognised emulation mode: thumb-interwork

Am I simply making a mistake? Inevitably, the real problem is that I 
can't get ld to use the interworking libgcc.a library properly, and 
forcing it in produces garbage *.elf output. But everywhere else I've 
looked, people are using a linker with -mthumb-interwork support, so I 
wanted to at least verify this issue.