[webkit-dev] Introducing a minimum ICU version for WebKit

[Brent Fulgham]

Please note that Per Arne updated the Apple ZIP files to have the correctly aligned ICU libraries, so the Windows bots should have what they need.

I apologize for taking so long to complete that.

Thanks,

-Brent

> On Apr 3, 2020, at 4:57 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
> 
> 
> On Fri, Apr 3, 2020 at 4:25 PM Kirsling, Ross <Ross.Kirsling at sony.com <mailto:Ross.Kirsling at sony.com>> wrote:
> Hi everybody,
> 
>  
> 
> Just sending out an email blast for visibility regarding https://bugs.webkit.org/show_bug.cgi?id=209694 <https://bugs.webkit.org/show_bug.cgi?id=209694>.
> 
>  
> 
> This patch:
> 
> Upgrades the Mac ICU headers under Source/WTF/icu from ICU 55 to ICU 62, matching Mojave
> Introduces a minimum ICU version of 60.2 throughout the codebase, as required by GTK for Ubuntu 18.04 LTS
>  
> 
> As written in the ChangeLog, the immediate motivations are:
> 
> To properly establish a minimum ICU version for WebKit as a whole
> (responding to a pain point identified in https://bugs.webkit.org/show_bug.cgi?id=209579 <https://bugs.webkit.org/show_bug.cgi?id=209579>)
> To support the development of ECMA-402 Intl API features, which JSC is quite behind on
> (and which often boil down to exposing ICU functionality to JavaScript)
>  
> 
> The only remaining concern of which I am aware is that AppleWin’s ICU headers, stored in WebKitAuxiliaryLibrary.zip, need to be upgraded from ICU 49 to 62 (to match the lib files stored in WebKitSupportLibrary.zip). We do have a potential workaround for this (i.e. having CMake copy the Mac headers to WebKitLibraries/win) but it is feared that this may break Apple-internal builds and we would certainly like to avoid a revert if possible. Any help on this front would be greatly appreciated.
> 
> 
> FWIW, I've been told that Brent / Per might be able to help you there but might need some more time due to other more urgent commitments.
> 
> - R. Niwa
> 
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