sparc: fix sigaction for 32bit builds [BZ #18694]

Commit a059d359d86130b5fa74e04a978c8523a0293f77 changed the sigaction
struct to pass conform tests, but it ended up also changing the ABI for
32 bit builds.  For 64 bit builds, changing the long to two ints works,
but for 32 bit builds, it inserts 4 extra bytes.  This leads to many
packages randomly failing like bash that spews things like:
	configure: line 471: wait_for: No record of process 0

Bracket the new member by a wordsize check to fix the ABI for 32bit.

1 files changed, 5 insertions, 1 deletions

diff --git a/NEWS b/NEWS
index a2c3b4840a..0e350a92c6 100644
--- a/NEWS
+++ b/NEWS
@@ -27,7 +27,7 @@ Version 2.22
   18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536, 18539,
   18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, 18557, 18558,
   18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, 18612, 18613,
-  18619, 18633, 18641, 18643, 18648, 18676, 18696.
+  18619, 18633, 18641, 18643, 18648, 18676, 18694, 18696.
 
 * Cache information can be queried via sysconf() function on s390 e.g. with
   _SC_LEVEL1_ICACHE_SIZE as argument.
@@ -71,6 +71,10 @@ Version 2.22
   compliance. The new implementation fixes the following long-standing
   issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
   old implementation is still present for use be by existing binaries.
+
+* The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
+  releases.  It has been fixed to match 2.19 and older, but binaries built
+  against 2.20 and 2.21 might need to be recompiled.  See BZ#18694.
 
 Version 2.21