build: add a flag v8_enable_simulator

[luyahan]

The v8 simulator can help we run test for non-x64 backend on x64 machine. So I add a flag to build v8 smulator.

[nodejs-github-bot]

Review requested:

• [ ] @nodejs/gyp
• [ ] @nodejs/v8-update

[luyahan]

Hi @targos Could you have time to review this pr?

[targos]

I don't feel qualified to review these changes, sorry.

[luyahan]

Hi @bnoordhuis
Could you have time to review this pr?

[luyahan]

Hi @mhdawson Could you have time to review this pr?

[luyahan]

I was able to get riscv64 simulator compiling, but a lot of the other configurations don't work (e.x. for cross-compilation or other reasons).

There's also a lot of configuration in the BUILD.gn which isn't replicated in this PR, for example:

• https://source.chromium.org/chromium/chromium/src/+/main:v8/BUILD.gn;l=1281?q=target_is_simulator%20path:v8%20path:BUILD%20&ss=chromium%2Fchromium%2Fsrc
• https://source.chromium.org/chromium/chromium/src/+/main:v8/BUILD.gn;l=2398?q=path:BUILD%20simulator%20%20path:v8%20&ss=chromium%2Fchromium%2Fsrc&start=1

Is there a reason that configuration isn't replicated in this PR?

Do you mean like this : ./configure --cross-compiling --dest-cpu=arm64?

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55699/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=benchmark-ubuntu2204-intel-64,v8test=v8test/5672/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-s390x,v8test=v8test/5672/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-ppc64le,v8test=v8test/5672/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55721/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55846/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55847/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55857/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/56003/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=benchmark-ubuntu2204-intel-64,v8test=v8test/5692/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-s390x,v8test=v8test/5692/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-ppc64le,v8test=v8test/5692/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/56120/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=benchmark-ubuntu2204-intel-64,v8test=v8test/5703/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-s390x,v8test=v8test/5703/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-ppc64le,v8test=v8test/5703/

[luyahan]

Hi I can't finad reason for node-test-commit failed. What i can do?

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/56548/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/57027/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=benchmark-ubuntu2204-intel-64,v8test=v8test/5796/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-s390x,v8test=v8test/5796/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-ppc64le,v8test=v8test/5796/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/57034/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/57737/