[PATCH weston] gl-renderer: Add a #define to obtain the prototypes from the gl2 header.

[Emil Velikov]

On 1 September 2016 at 15:12, Emmanuel Gil Peyrot
<emmanuel.peyrot at collabora.com> wrote:
> This prevents a segfault when running on Mesa master, due to the GLES2
> symbols not being declared with the correct prototype (or at all).
>
> Signed-off-by: Emmanuel Gil Peyrot <emmanuel.peyrot at collabora.com>
> ---
>  libweston/gl-renderer.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/libweston/gl-renderer.c b/libweston/gl-renderer.c
> index 031576b..3979c3a 100644
> --- a/libweston/gl-renderer.c
> +++ b/libweston/gl-renderer.c
> @@ -26,6 +26,7 @@
>
>  #include "config.h"
>
> +#define GL_GLEXT_PROTOTYPES
General rule of thumb is that:
 - Extension symbols are fetched via the {wgl,glX,egl}GetProcAddress APIs
 - By defining *_PROTOTYPES you explicitly acknowledge that your
program is _not_ portable.

Yet again, it could be that there's something busted in mesa which
will require this, in which case you want a big warning/message and a
friendly poke to mesa-dev/bugzilla :-)

Thanks
Emil