Add SqueakLiveTyping VM build process (ARM + x64 on Win/Linux/Mac)

[hernanwilkinson]

What

Adds a first-class, CI-driven build for the LiveTyping variant of the Spur 64-bit Cog VM, branded SqueakLiveTyping, coexisting with the stock Squeak VM. Produced for the six modern 64-bit targets: macos64x64, macos64ARMv8, win64x64, win64ARMv8, linux64x64, linux64ARMv8.

Why

LiveTyping is a runtime type-collection feature baked into a regenerated Spur64 Cog source tree (LiveTypingCoInterpreter / LiveTypingCogit, VMMaker.oscog-eem.3776). Until now it had no dedicated artifact or CI. This PR turns it into a proper, reproducible build flavor.

How

• src/spur64.cog.livetyping/ — dedicated generated source tree, split out from the stock src/spur64.cog so both VMs can be built side by side.
• building/<arch>/squeak.cog.spur.livetyping/ — a new flavor dir per target, mirroring each platform's squeak.cog.spur but pointing VMSRCDIR / --with-src at the livetyping tree and branding the artifact SqueakLiveTyping:
  • macOS: new common/Makefile.app.squeaklivetyping sets APPNAME:=SqueakLiveTyping -> SqueakLiveTyping.app
  • Windows: VM:=SqueakLiveTyping + SqueakLiveTyping.def.in / .rc / .exe.manifest
  • Linux: build*/mvm use --with-src=src/spur64.cog.livetyping, INSTALLDIR=sqcogspurlt64...
• CI — squeak.cog.spur.livetyping added to matrix.flavor of the six platform workflows, with exclude blocks so it builds only the supported 64-bit (and threaded-heartbeat on Linux) legs. It rides the existing actions_build.sh -> pack-vm.sh -> release pipeline, producing squeak.cog.spur.livetyping_<arch> artifacts.

Verification

Local macos64ARMv8 fast build produces SqueakLiveTyping.app whose binary reports LiveTypingCoInterpreter / LiveTypingCogit. The stock squeak.cog.spur build is unaffected (it still compiles the restored stock src/spur64.cog).

Note

The regenerated LiveTyping interp.h does not #define IMMUTABILITY 1 (immutability OFF), as generated by VMMaker; no build config restores it. Flagging in case that should change.

[eliotmiranda]

Hi Hernan,

the name scheme for the build directories should be
    squeak.livetyping.spur

This matches e.g. squeak.sista.spur, since the live typing machinery implies cog. Sorry to ask you to do this but please resubmit the pull request with all squeak.cog.spur.livetyping directories renamed to squeak.livetyping.spur

[hernanwilkinson]

@eliotmiranda I renamed the directory as you suggested, and changed the related files.
Let me know if it is ok or if I should change something else.

[marceltaeumel]

Have you tried the regular OSVM builds? Callbacks (i.e. thunks) work fine on Windows ARM64. This change seems unnecessary unless your build works differents compared to win64ARMv8/squeak.cog.spur.

https://github.com/OpenSmalltalk/opensmalltalk-vm/releases/download/latest-build/squeak.cog.spur_win64ARMv8.zip

[marceltaeumel]

If you are referring to a MinGW-w64 toolchain, please expand your commentary. I am referring to WinSDK builds, which we do in CI.

[marceltaeumel]

This is a nice contribution for an extra pull request. It is rather surprising in this one. Please add also some more information about the change.

[marceltaeumel]

This is a nice contribution for an extra pull request. It is rather surprising in this one. Please add also some more information about the change.

[marceltaeumel]

I object to the changes in the following files, which should rather be proposed as an extra pull request.

platforms/win32/plugins/SqueakFFIPrims/Makefile.plugin
platforms/win32/plugins/SqueakFFIPrims/winARM64Thunk.c
platforms/win32/vm/sqWin32Backtrace.c
platforms/win32/vm/sqWin32Heartbeat.c

As I commented in winARM64Thunk.c, I am unsure whether that change is necessary at all as it works already without in our regular builds.