[testsuite, ada] Convert ACATS to DejaGnu (PR testsuite/37703)

[Joseph S. Myers]

On Tue, 1 Feb 2011, Rainer Orth wrote:

> Michael Matz <matz@suse.de> writes:
> 
> > If Solaris as works with the version in elfos.h (using .string and 
> > .ascii) you can just remove it from i386/sysv4.h.
> 
> I'll give that a try, all the way back to Solaris 8.  Since
> i386/sysv4.h is only used on Solaris 2/x86, I don't even need approval
> for such a change.

Whether using the elfos.h version works or not, it's clearly silly for 
this code to be using a quadratic algorithm as the i386/sysv4.h is doing 
at present (recomputing the location of the next 0 byte for every byte in 
the string - elfos.h saves last_null to avoid that).

For the general issue: a slow test appears to have served its purpose by 
showing up a (target-specific) bug in the compiler.  And in general you 
need to consider whether a resource-hungry test is actually showing up a 
bug and should not be so resource-hungry, before reducing the test size or 
only running it conditionally.  (You might still reduce it after finding 
it shows a bug - but only after filing that bug in Bugzilla; not simply 
blindly presume that the test is too big for the testsuite.)

-- 
Joseph S. Myers
joseph@codesourcery.com