llvm on ia64 ?

llvm port fails to build on ia64 current:

gmake[3]: Leaving directory `/usr/ports/devel/llvm/work/llvm-2.6/tools/llvmc/driver'
gmake[2]: Leaving directory `/usr/ports/devel/llvm/work/llvm-2.6/tools/llvmc'
/usr/ports/devel/llvm/work/llvm-2.6/Release/lib/libLLVMJIT.a(JIT.o)(.text+0x1231): In function `llvm::JIT::JIT(llvm::ModuleProvider*, llvm::TargetMachine&, llvm::TargetJITInfo&, llvm::JITMemoryManager*, llvm::CodeGenOpt::Level, bool)':
: undefined reference to `__register_frame'
/usr/ports/devel/llvm/work/llvm-2.6/Release/lib/libLLVMJIT.a(JIT.o)(.text+0x2011): In function `llvm::JIT::JIT(llvm::ModuleProvider*, llvm::TargetMachine&, llvm::TargetJITInfo&, llvm::JITMemoryManager*, llvm::CodeGenOpt::Level, bool)':
: undefined reference to `__register_frame'
gmake[2]: *** [/usr/ports/devel/llvm/work/llvm-2.6/Release/bin/lli] Error 1
gmake[2]: Leaving directory `/usr/ports/devel/llvm/work/llvm-2.6/tools/lli'
gmake[1]: *** [lli/.makeall] Error 2
gmake[1]: Leaving directory `/usr/ports/devel/llvm/work/llvm-2.6/tools'
gmake: *** [all] Error 1
*** Error code 1

Stop in /usr/ports/devel/llvm.
*** Error code 1


Anything I can do to help debug this?

many thanks

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
Tel: +44 (0)117 331 5944
Fax: +44 (0)117 929 4423