Hi Hannes,

See my longer post, but how it will work to have both `std::` 
implementations for code 
like 
https://source.chromium.org/chromium/chromium/src/+/main:v8/include/v8-cppgc.h;l=36-38

In the embedder code, `std::vector` comes from Microsoft, for V8 - from 
libc++ ?

Dimitar

On Tuesday, June 18, 2024 at 7:17:05 PM UTC+3 hpa...@google.com wrote:

> Hi Jean-Claude,
>
> The preferred way would be to link both standard libraries. In your case, 
> libc++ could be private to V8 and Microsoft standard library could be used 
> for the rest. 
>
> Cheers,
> Hannes
>
> On Tue, Jun 18, 2024 at 9:41 AM Jean-Claude Monnin <jc_m...@emailplus.org> 
> wrote:
>
>> Hi Hannes,
>>
>> Just a clarification: Does that mean only MSVC the compiler isn't 
>> supported anymore, but the Microsoft C++ Standard Library still works [1]? 
>> As you said, clang-cl is ABI compatible with MSVC, so I don't care which 
>> compiler is used to compiled v8, as long as I can link v8 with other code.
>>
>> It's not always possible to use libc++ on Windows. In my case it's the 
>> precompiled Qt (possibly Qt works with libc++ on Windows, but I think it's 
>> unsupported). Mixing two huge libraries which require different C++ 
>> standard libraries wouldn't be fun. Additionally, I use closed source SDK's 
>> which mandate the Microsoft C++ standard library. I probably can't convince 
>> you if you want to support only libc++ on Windows, but I hope the Microsoft 
>> standard library is still supported so that v8 can be used in a standard 
>> Windows executable (fingers crossed).
>>
>> Cheers,
>> Jean-Claude
>>
>> [1]: 
>> https://learn.microsoft.com/en-us/cpp/standard-library/cpp-standard-library-overview?view=msvc-170
>>
>> On Tue, Jun 18, 2024, at 8:16 AM, 'Hannes Payer' via v8-users wrote:
>>
>> Hi all,
>>
>> We acknowledge that this is a change for everybody who is using MSVC. 
>> However there is a solution which hopefully works for many projects: 
>> clang-cl produces ABI-compatible output to MSVC. You can build v8 with 
>> clang-cl and link it to the code which is built with MSVC. The MSVC 
>> installer includes clang-cl as an install option.
>>
>> Cheers,
>> Hannes
>>
>> On Mon, Jun 17, 2024 at 9:27 PM Ben Ernst <boi...@gmail.com> wrote:
>>
>> Ouch! We do use V8 on a live project compiled with MSVC. Thought it was 
>> worth throwing a comment out there, although I'm sure this isn't a decision 
>> that was taken lightly.
>> Cheers,
>> Ben
>>
>>
>>
>>
>>
>> On Mon, 17 Jun 2024 at 11:58, Hannes Payer <hpa...@chromium.org> wrote:
>>
>> Hi all,
>>
>> V8 will follow Chromium's lead 
>> <https://groups.google.com/a/chromium.org/g/chromium-dev/c/fuVUxe1q6EA> 
>> and will discontinue support for MSVC. To give projects time to adjust, we 
>> will stop support after V8 version 13.0 in September 2024. After that, we 
>> will remove the infrastructure bots and MSVC compatibility hacks in the 
>> code base.
>>
>> Cheers,
>> Hannes
>>
>>
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