[Mesa-dev] meson builds don't read dri options

[Dylan Baker]

There's a bug in our meson build, and I sent a patch. We need to join_dirs with
get_option('prefix'). I got a little confused because when you pass a relative
directory to meson's `install` option it will autotmatically make it absolute,
but when you pass it to a C define it doesn't.

Quoting Kenneth Graunke (2018-01-23 10:00:56)
> On Tuesday, January 23, 2018 3:31:23 AM PST Marc Dietrich wrote:
> > Hi Dylan,
> > 
> > running "Heaven" fails with "error: #extension directive is not allowed in the 
> > middle of a shader" because drirc (which contains an exception for this 
> > program) is somehow not read in meson builds.
> > 
> > Marc
> 
> Hey Dylan,
> 
> Marc is right, this is not working correctly.  driParseConfigFiles has:
> 
>     char *filenames[2] = { SYSCONFDIR "/drirc", NULL};
> 
> where SYSCONFDIR comes from Meson's get_option('sysconfdir').
> 
> The issue is that SYSCONFDIR is apparently getting expanded to "etc",
> so it's looking for "etc/drirc".
> 
> sysconfdir is supposed to default to $(prefix)/etc, so /usr/local/etc:
> https://www.gnu.org/prep/standards/html_node/Directory-Variables.html
> 
> I wonder if this is a Meson bug or if we're handling sysconfdir wrong.
> 
> --Ken
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