Aaron Davies wrote:
> I ran into this trying to build current coreutils on Solaris with sun studio 11
>
> the workaround I found was to use sun studio 12

I'm also using Sun Studio 12. That being said, I now see that I was using Sun C 
5.9 (Patch 124867-12 2009/11/22), which is the original Sun Studio 12. I earlier 
reported that I was using Sun C 5.13, i.e., Oracle Solaris Studio 12.4, but I 
was mistaken. Oracle's compiler versioning is complicated; see 
<http://www.oracle.com/technetwork/server-storage/solarisstudio/training/index-jsp-141991.html>.

I just now looked at the C11 standard, and it prohibits Pádraig's 2015-06-25 
change to fts.c that uses alignof on a structure with a flexible array member. 
And I now see that IBM's xlc compiler also complains about this. though I didn't 
notice this earlier.

Although the C11 prohibition is arbitrary and perhaps not even intended, it's in 
the standard, and we should fix fts.c to conform. I installed the attached patch 
into gnulib, and this will be merged into grep the next time we update its 
gnulib version. I can see one more gnulib fix that's also needed for grep, and 
plan to follow up shortly.