On Thu, 19 Jun 2025 14:09:47 GMT, Magnus Ihse Bursie <i...@openjdk.org> wrote:
>> When you download VS on x64 you just get cross-compilers for aarch64 (I >> don't know why). The `Hostarm64` directory is not created in x64 machines. > > So if we run the devkit script on an aarch64 machine, we can create a devkit > that will work on both x64 and aarch64? But if we run it on x64, the devkit > that we create will only work on x64? Have I got this right? > > If so, I think the script should support this, and make it clear what it > does. That is, if you run it on aarch64, you get a multi-platform devkit, but > on x64 you get a x64-only devkit. I think the devkit script should mention > this, ideally in an `echo` statement, but a comment in the source code is > acceptable. Like: > `You are generating a devkit for x64 only. To include aarch64 as well, run > the script on windows/aarch64` and `Generating devkit for x64 and aarch64`, > respectively. Or something like that. I was planning adding something like this: # Detect host architecture to determine devkit platform support # Note: The devkit always includes x86, x64, and aarch64 libraries and tools # The difference is in toolchain capabilities: # - On x64|AMD64 hosts: aarch64 tools are cross-compilation tools (Hostx64/arm64) # - On aarch64|ARMv8 hosts: aarch64 tools are native tools (Hostarm64/arm64) HOST_ARCH=`echo $PROCESSOR_IDENTIFIER` case $HOST_ARCH in AMD64) echo "Running on x64 host - generating devkit with native x86/x64 tools and cross-compiled aarch64 tools." echo "For native aarch64 compilation tools, run this script on a Windows/aarch64 machine." SUPPORTED_PLATFORMS="x86, x64 (native) and aarch64 (cross-compiled)" ;; ARMv8) echo "Running on aarch64 host - generating devkit with native tools for all platforms (x86, x64, aarch64)." SUPPORTED_PLATFORMS="x86, x64, and aarch64 (all native)" ;; *) echo "Unknown host architecture: $HOST_ARCH" echo "Proceeding with devkit generation - toolchain capabilities may vary." SUPPORTED_PLATFORMS="x86, x64, and aarch64" ;; esac ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/25259#discussion_r2157794144