[webkit-dev] CMake as a build system?

Darin Fisher darin at chromium.org
Mon Apr 26 23:46:12 PDT 2010

On Fri, Apr 23, 2010 at 12:54 AM, Darin Fisher <darin at chromium.org> wrote:

> On Tue, Apr 20, 2010 at 10:53 AM, Peter Kasting <pkasting at google.com>wrote:
>> On Tue, Apr 20, 2010 at 1:26 AM, Patrick Roland Gansterer <
>> paroga at paroga.com> wrote:
>>> Bradley Nelson:
>>> > 1. Ability to incrementally transition on Windows. It took us about 6
>>> >  months to switch fully to gyp. Previous attempts to move to scons had
>>> >  taken a long time and failed, due to the requirement to transition
>>> while
>>> >  in flight. For a substantial period of time, we had a hybrid of
>>> checked in
>>> >  vcproj and gyp generated
>>> CMake should be treated like a separate buildsystem like qmake or gyp
>>> during a
>>> possible switch.
>> The point was that we wanted to be able to switch over in a gradual
>> fashion, not by constructing a complete, functional parallel build system
>> and then "throwing the switch".
>> If you take a look in the current vcprojs you can't understand them more
>>> easy
>>> than compared to CMake IMHO.
>>> Anyway: How often do you look at these settings? I use the IDE only for
>>> writing code and debugging. I do all my buildsystem changes directly in
>>> the
>>> CMake files. If i see the source files in the IDE I'm already happy. Do
>>> you
>>> have other requirements?
>> AIUI, readability isn't the issue, it's the ability for e.g. Visual Studio
>> to correctly understand dependencies itself so that incremental builds from
>> inside the IDE (which is where most Windows Chromium developers do their
>> builds) work correctly and are as fast as possible (e.g. the null build
>> should take close to zero time and not have to rerun steps or relink
>> executables).
> Indeed.  It also allows features like Ctrl+F7 (compile only the current
> source file) to work.  A number of other common IDE features are lost if you
> use a makefile based vcproj.  GYP nicely preserves all of those great IDE
> features, which to me is one of the main selling points as an end-user.
> -Darin
Please disregard my comments above.  Thanks to Patrick for showing me that
CMake does indeed generate vcproj files that preserve this degree of
integration with the IDE.  GYP and CMake appear to have that in common.


>> PK
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