[Gtk] Move feature defines processing into a GNUmakefile that's simple to autogenerate

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Zan Dobersek]

The idea is to process all the feature defines in a simple-to-generate GNUmakefile.features.am. The end goal is to simplify adding a new feature define to the project, with all the relevant files being autogenerated (covered by bug #85456).

In GNUmakefile.features.am (in Source/WebCore) all the feature defines would be added to the FEATURE_DEFINES and webcore_cppflags variables, set to the default value - 1 for enabled, 0 otherwise. In GNUmakefile.am the GNUmakefile.features.am would be included. The values of feature defines would then be overridden based on the configuration options used when running the configure script. Currently there are many configuration options, but they should be narrowed down (bug #87126) so this wouldn't be such a big burden to maintain (if any).

[Martin Robinson]

One important usecase to consider is that we often enable things for build-webkit and disable them for normal configure runs. This allows us to have the bots test something and not ship it.

[Zan Dobersek]

(In reply to comment #1)
> One important usecase to consider is that we often enable things for build-webkit and disable them for normal configure runs. This allows us to have the bots test something and not ship it.

I can't imagine a solution to this from the top of my head other than manually going through the list of the feature defines and switching their status if necessary after the release branch is formed.

[Martin Robinson]

(In reply to comment #2)
> (In reply to comment #1)
> > One important usecase to consider is that we often enable things for build-webkit and disable them for normal configure runs. This allows us to have the bots test something and not ship it.
> 
> I can't imagine a solution to this from the top of my head other than manually going through the list of the feature defines and switching their status if necessary after the release branch is formed.

Unfortunately, it's not just the release branch, but also in unstable releases as well.

[Zan Dobersek]

Created attachment 145118 [details]
Patch

[Zan Dobersek]

Created attachment 151109 [details]
Patch

[Zan Dobersek]

Created attachment 158546 [details]
Patch

[Martin Robinson]

Comment on attachment 158546 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=158546&action=review

Okay, but definitely watch the bots on this one. It may also be a good idea to double-check "make distcheck"

> Source/WebCore/GNUmakefile.am:650
>  	ACCELERATED_COMPOSITING=1

This introduces an unused -DACCELERATED_COMPOSITING variable. I guess that's not a terrible side-effect.

> Source/WebCore/GNUmakefile.am:793
> +# Add the feature defines to webcore_cppflags in macro form

Nit: Missing a period on this comment.

> GNUmakefile.am:64
> +FEATURE_DEFINES_DEFAULTS :=
> +FEATURE_DEFINES_OVERRIDES :=
> +FEATURE_DEFINES :=

I think it'd make sense to use small_case here to match other variables.

[Zan Dobersek]

Comment on attachment 158546 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=158546&action=review

>> Source/WebCore/GNUmakefile.am:650
>>  	ACCELERATED_COMPOSITING=1
> 
> This introduces an unused -DACCELERATED_COMPOSITING variable. I guess that's not a terrible side-effect.

I'll remove this define as it's not used at all.

[Zan Dobersek]

Committed as http://trac.webkit.org/changeset/126450.

[Zan Dobersek]

*** Bug 85753 has been marked as a duplicate of this bug. ***