issues on gcc202

[paul zimmermann]

       Dear Torbjörn,

>   This is not yet isolated.  It looks like a compiler or perhaps more
>   likely a linker bug.  Last night I reverted another change which
>   benefited gcc202, so now there will be more errors.
>   
>   I am not actively working on this issue, but I will probably isolate it
>   at some point.
> 
> Alas, I got around to this now.
> 
> There were a number of problems:
> 
> 1. The pseudo-insn setx didn't work on gcc202.  I worked around this by
>    expanding the needed insn, and also to go with the 44-bit addressing
>    model (instead of the expensive 64bit).  44-bit addrs is the default
>    on both gcc202 and NetBSD 7.x at least.  (I suppose we should allow
>    an configure option for this, but since my SPARC access is extremely
>    limited I cannot test any such features. Besides, SPARC is not in
>    much use.)
> 
> 2. The relocs used for PIC in sparc32/sparc-defs.m4 fails on gcc202.  I
>    updated with PICkier choices.
> 
> 3. The C sec_invert and the Sparc T3 asm cnd_add_n/cnd_sub_n did not
>    agree about how to specify the condition.  Should true be 1 or any
>    non-zero value?  I decided for the latter and updated the asm.

thank you, I confirm make check runs with the gmp-6.1.99-20170831 snapshot
on gcc202.

However I had to define INTERPRETER= in test-driver.

Also the "Testsuite summary" is still not very informative:

============================================================================
Testsuite summary for GNU MP 6.1.99
============================================================================
# TOTAL: 0
# PASS:  0
# SKIP:  0
# XFAIL: 0
# FAIL:  0
# XPASS: 0
# ERROR: 0

Paul