[Pkg-sugar-devel] Bug#528774: Bug#528774: squeak-vm: FTBFS (hppa/unstable): error: 'struct sigaction' has no member named 'sa_restorer'

[John David Anglin]

On 2018-09-23 4:47 AM, Jonas Smedegaard wrote:
> I am a bit puzzled, however: It seems from
> https://buildd.debian.org/status/package.php?p=squeak-vm  that the
> package no longer fails to build from source.
I manually built and uploaded the package using the proposed patch. If 
you look at it,
you will see it simply adds hppa to a list of targets without sa_restorer.
>
> Does that mean newer compilers magically handle this correctly so the
> patch is not needed, or perhaps - more worrisome - that newer compilers
> still lead to wrong code but no longer fails?
No, this isn't a compiler problem.  The 'struct sigaction' has no member 
named 'sa_restorer'
on hppa.  POSIX doesn't require this field.

It has to do with how signal returns are done on hppa.  We can't add the 
field without breaking
ABI.  Possibly, hppa might use ka_restorer in the future but there is 
another technique that might
be used to avoid having an executable stack.

Dave

-- 
John David Anglin  dave.anglin at bell.net