I agree with this in principle, but we're long past that, I think?
>From one of the Mac build files:

                                FEATURE_DEFINES = "ENABLE_DATABASE=1 
ENABLE_DASHBOARD_SUPPORT=0
ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0
ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1
ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1
ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0
WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\"
USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1
XP_MACOSX=1\nENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0
ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0
ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1
ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1
ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0
WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\"
USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1";

(PS: Now that I look, XP_MACOSX is in there twice -- maybe the
embedded \n made the first one go through.)

On Tue, Feb 17, 2009 at 10:30 AM, Darin Fisher <[email protected]> wrote:
> +1
> Google style encourages including everything you need in the source.  There
> should be no magic -include lines required to build the source.
> This is why pre-compiled headers are disabled in release builds.  If they
> were not, then over time people would only be able to build the source if
> they included the precompiled header on the command line.
> -Darin
>
>
> On Mon, Feb 16, 2009 at 8:11 PM, Mark Mentovai <[email protected]> wrote:
>>
>> I don't agree with this approach.  I think that we should include what
>> we use, and that should extend to headers that provide nonstandard
>> macro definitions.  I think that we should be expressing as much as
>> possible in code rather than in build environments.  Most importantly,
>> I don't like the idea of globally polluting the macro namespace for
>> something like this.  Our OS_* macros are ours (emphasis on "ours")
>> and I don't want to leak those defines to all of the other third-party
>> code that we build.
>>
>> Mark
>>
>> Evan Martin wrote:
>> > A few people I've talked to independently have expressed interest in
>> > getting rid of build/build_config.h.
>> >
>> > It is easy to forget to include, requires being included in a
>> > nonstandard place, and ends up being used everywhere anyway.  It is
>> > easier to just define the few #defines we need in build scripts.  (I
>> > think the compiler- and architecture- specific defines could move to a
>> > different file eventually, but we almost never use those.)
>> >
>> > http://codereview.chromium.org/21401 does this.  It seems to work on
>> > Windows (I'd like an expert to doublecheck I did it the right way) but
>> > my wild guess at making Mac work is apparently wrong.  If any Mac
>> > expert could help out, I'd appreciate it.
>>
>> >>
>
>

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