llvm dev - Mar 2016 - machine/endian.h problem in building llvm at HP-UX ia64 11.31

I'm trying to build llvm 3.7 at HP-UX ia64 11.31

I installed gcc4.7.1, python, and gmake with depot package

I followed instruction documented at
http://llvm.org/releases/3.7.0/docs/BuildingLLVMWithAutotools.html

I succeeded following command:
$ ../llvm/configure

After that I used following command:
$ CFLAGS=-fpermissive gmake

With above command I got an error. Following is some part of the error:
...
In file included from ...
llvm/include/Support/Host.h : fatal error : machine/endian.h No such file
or directory

However machine/endian.h doesn't exist at HP-UX. But my linux machine has
that file.

Is there anybody who succeeded building llvm at HP-UX?
Should I write a code that has the same meaning as machine/endian.h?
Or is there any alternative header file?
Or can I get some other suggestions?

Thanks,
Jemin Kim
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