Re: Fwd: Status of gcj/java on PPC Linux?

[Tom Tromey <tromey at redhat dot com>]

>>>>> "Kevin" == Kevin B Hendricks <khendricks@ivey.uwo.ca> writes:

Kevin> Okay one more thing.  I don't want my patches to break anything
Kevin> for any other POWERPC port.  Unfortunately the trampoline sizes
Kevin> and code and how parameters are passed are different for
Kevin> different AIX and Linux PPC.

Ok.

Kevin> I need to define some things in ffi.h.in to turn on closures
Kevin> and set the trampoline size and don't want to simply use the
Kevin> libffi defined(POWERPC) for fear it breaks AIX.

You could just enable it and then call FFI_ASSERT in the closure code
to force a failure on AIX.  (I'm partially guessing here; I don't know
all that much about libffi.)

Another approach would be to add a new #define to ffi.h.in that says
something about the ABI.  Or, you could introduce a new target like
"POWERPCLINUX" (or whatever is appropriate).  This latter approach
might require more hacking though.

Kevin> Will defined(__linux__) && defined(__powerpc__) work or is
Kevin> there something like defined(LINUX) && defined(POWERPC) you
Kevin> would rather I used.

Is it just Linux or is it a whole class of systems with a different
name?  In the POWERPC section I see two ABIs: FFI_SYSV and
FFI_GCC_SYSV.  Which is the `Linux' one?

Tom