Re: stdalign test with HP-UX cc

[Paul Eggert]

Bruno Haible wrote:

> This manual is for a quite new HP cc on Itanium (IA-64) servers.
> I'm talking about an older HP cc on hppa.

2008 is "quite new"? Clocks must run slowly in the HP-UX world. :-)

I guess the 'aligned' attribute works with some HP-UX cc compilers but not 
others. We know it does not work on your compiler (PA-RISC, __HP_cc==111120). 
This circa 2013 email quoting Richard Lloyd:

https://lists.gnu.org/archive/html/bug-gnulib/2013-02/msg00095.html

suggests that he had PA-RISC version 111120 and Itanium version 62600 - the 
former corresponding to the compiler you used, and the latter presumably 
corresponding to the Itanium version A.06.20 listed in the manual you cited, the 
manual that says "__attribute__ ((aligned (16)))" works.

I'm inclined to guess that the 'aligned' attribute works on new-enough Itanium 
but not PA-RISC compilers. If my guess is right Emacs is in less trouble, since 
PA-RISC is mostly obsolete but Itanium is still going. So, how about if we 
assume that the "061200" applies to Itanium but not PA-RISC? That should fix 
your problem, and we can find out later if the "061200" is right for Itanium, if 
and when someone tries it out. Something like the attached, which I boldly 
installed.

0001-stdalign-restore-previous-behavior-for-HP-UX-IA64.patch
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