[boost] build err Boost 1.51.0 for PPC64 - is this a real error?

Subject: [boost] build err Boost 1.51.0 for PPC64 - is this a real error?
From: david.hagood_at_[hidden]
Date: 2012-10-12 15:19:06

I have a reproducible error attempting to build Boost 1.51.0 for a PPC64
system:

libs/context/src/asm/fcontext_ppc64_sysv_elf_gas.S:225: Error: syntax
error; found `@', expected `,'
libs/context/src/asm/fcontext_ppc64_sysv_elf_gas.S:225: Error: junk at end
of line: `@plt'
libs/context/src/asm/fcontext_ppc64_sysv_elf_gas.S:249: Error: syntax
error; found `@', expected `,'
libs/context/src/asm/fcontext_ppc64_sysv_elf_gas.S:249: Error: junk at end
of line: `@plt'

I've seen one other person report this online, but I've seen no follow-ups.

1) Is this a known issue in 1.51.0?
2) Is there a patch?
3) Should I try the 1.52.0 Beta instead? I'd rather not spend all the time
building it to find there is an issue.

I have 1.51.0 for PPC32, i686, X86_64, and ARM - it's just the PPC64 that
fails.