First Impressions: Lenovo T14s with Qualcomm Snapdragon ARM64 CPU

I always ask about battery consumption... Apple seems to be on another galaxy right now. I decided to stop waiting and installed Parallels to run Ubuntu there... I really wish the best for Asahi Linux.

The M3 Max laptops can cross-build FreeBSD at a fraction of the time of the ThinkPad, being at around 791 seconds for `make -j17` versus the T14s being at 3210 seconds (with `make -j12`) according to the post above.

No idea about power consumptions.

It still scares me.

Do you have more details or a source on this? I'd like to learn more about the build process and timings.

Sure.

I basically did the following on trunk:

  $ CPP=/usr/bin/clang MAKEOBJDIRPREFIX=/private/var/tmp/obj ./tools/build/make.py  TARGET=arm64 TARGET_ARCH=aarch64 --host-compiler-type clang --debug -j17 --clean buildworld

You probably can follow build(5) from FreeBSD hosts instead.

NetBSD is similar, but you need to edit `tools/llvm/Makefile` and make sure that you use the following target for `support-modules` instead:

   support-modules: module-test.cpp Makefile
  -       if ${HOST_CXX} -stdlib=libc++ -c -fmodules -fcxx-modules -fmodules-cache-path=./module.cache \
  -          ${.CURDIR}/module-test.cpp  3> /dev/null 2>&1; then \
  -               echo HOST_SUPPORTS_MODULES=yes > ${.TARGET}; \
  -       else \
  -               echo HOST_SUPPORTS_MODULES=no > ${.TARGET}; \
  -       fi
  +       # Just don't use modules pre for C++20 targets. Some compilers cannot support them.
  +       echo HOST_SUPPORTS_MODULES=no > ${.TARGET};

You can further speed up NetBSD builds by editing `share/mk/bsd.sys.mk` and removing the workaround for SunPro's cc. The repeated invocation of /bin/mv for each object file really does add up.

I have not tried cross builds of OpenBSD from other operating systems.