Re: [RFA] Sparc/Linux fixes part 1

["David S. Miller" <davem@redhat.com>]

   From: Michael Snyder <msnyder@redhat.com>
   Date: Fri, 19 Apr 2002 18:25:32 -0700

   "David S. Miller" wrote:
   > 32-bit Sparc under Linux does not have a 16-byte long double,
   > this causes testsuite failures.  Fix this by providing a
   > SPARC_TARGET_LONG_DOUBLE_BYTES the OS specific target headers
   > can override.
   
   The idea is sound, but the implementation is not very 
   multi-arch-ish.  Is there a runtime way to do this, 
   rather than by using a macro?  The whole purpose of
   multi-arch is that these decisions get made at runtime.

Some more commentary, just to be absolutely clear...

Note that this is an OS-specific setting, and the current
multi-arch code does not lend itself to anything other
than cpu target gdbarch inits.

If GDB provided a framework whereby I could install an os-specific
gdbarch_init, I'd be more than happy to implement this in the
holy-grail-multi-arch way you want me to.

Look, I'll stick around long after this change is installed so
when the facility is there, I will convert this long double
stuff to use it and the macros will basically disappear from the
sparc headers. :-)