Supporting pthreads in libjava on Tru64 UNIX

[Rainer Orth]

Richard Henderson writes:

> For the record, .subsection is not an ELF directive.  It
> originated with a.out and is supported generically in gas.

I've just tried with Alpha/ECOFF gas, which rejected .subsection.  Further
checking revealed that the .subsection pseudo-op is ELF-only (only defined
in obj-elf.c), but the concept is implemented for every object file format,
just using (e.g.) the `.text 2' (or similar) syntax.  Anyway, this is moot
since boehm-gc must support non-gas assemblers as well.

	Rainer