Re: [Mesa-dev] Mesa (master): glsl: do not use deprecated bison-keyword

[Hans Åberg]

> On 22 May 2019, at 08:54, Erik Faye-Lund <address@hidden> wrote:
> 
> The problem is that Bison doesn't seem to have any mechanism for doing
> statements like these conditionally. The only way around that that I
> can see is to pre-process the source files somehow. But especially with
> three different build systems, that's not really a venue I find
> particularly attractive. If someone can think of a neat solution, I
> would certainly love to hear about it :)

One can set the distribution so that the Bison sources are only re-compiled if 
modified.