Re: [PATCH] drm/i915: Make DRM_I915_WERROR depend on !COMPILE_TEST

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On Sun, May 24, 2015 at 10:48:07AM +0100, Damien Lespiau wrote:
> With allyesconfig/allmodconfig, kbuild enables all the options it can,
> including DRM_I915_WERROR. That's not really what we want with -Werror,
> and this was breaking the build for Andrew.
> 
> Andrew suggested to use COMPILE_TEST as a way to 'detect' these
> configurations.
> 
> An alternative would be to inverse the condition of the option:
> DRM_I915_NO_WERROR. Setting that one to Y would have no effect, at the
> price of a bit of confusion.
> 
> Another alternative would be to introduce a allyesmodconfig_n property
> to config entries, like the allnoconfig_y one we have today:
> 
>   - "allnoconfig_y"
>     This declares the symbol as one that should have the value y when
>     using "allnoconfig". Used for symbols that hide other symbols.
> 
> Of course, allyesmodconfig_n would set the value to n when using
> "allmodconfig" or "allmodconfig". That alternative needs a bit more work
> though and may not be desirable, given that even allnoconfig_y is used
> only once today.
> 
> Reported-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>

As a proxy, it seems reasonable.
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>

Do you also have a patch for the broken code? :)
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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