[OpenIndiana-discuss] struct msghdr and _XPG4_2

[Aurélien Larcher]

On Wed, May 25, 2016 at 3:25 PM, James Carlson <carlsonj at workingcode.com>
wrote:

> On 5/25/2016 4:13 AM, Alexander Pyhalov wrote:
> > The issue here is that illumos tries to be compatible with I don't know
> > what. So instead of POSIX-complying OS we have an OS which has interface
> > compatible to I don't know what (SunOS 4? something prehistoric?), which
> > doesn't work for applications written in last 10 years...
> >
>
> The nice thing about standards is that there are so many to choose from.
>
> The standards(5) man page has the gory details.  In short, the system
> can provide compliance with multiple different standards, but you have
> to select which one you want, because (sadly!) the different standards
> (the various versions of POSIX, SUS, XNS, and so on) are not binary
> compatible with each other.
>
> It's not terrifically hard to do -- setting -D_XOPEN_SOURCE=600 on a
> compiler compatible with at least c99 and linking with -lxnet should set
> you up with a SUSv3 environment -- but, no, it's not automagical.
>

True but the main issue is that on other systems compliance with standards
may be incorrect... and so would software written on them.
Even on FreeBSD I have seen _XOPEN_SOURCE=500 assuming c99.
I think Alexander found more of them hardcoded in source files while
testing gcc 5.3...

>
> --
> James Carlson         42.703N 71.076W         <carlsonj at workingcode.com>
>
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