How to build gfxstream host for arm64

[AJ-RR]

Hello,

I want to build the host for arm64. My goal is to allow GPU virtualization on a custom Linux OS that I have developed for Pixel phones. So my host is arm64. When I build gfxstream from aosp, it is built for x86-64. My build machine is x86. Is there a way to cross compile?

Thanks

[rpolitex]

Hi, there
For whom this may be helpful. Here's a small rebuild guide for AOSP (tested on version 15).

I've found that the AOSP cuttlefish VMM repo has rebuild script for this:

./device/google/cuttlefish_vmm/rebuild.sh --docker --docker_arch=aarch64

The overal steps are the next:

1. Edit code in gfxstream
2. git commit && git push
3. Copy new commit hash
4. Edit cuttlefish_vmm/manifest.xml - update revision="NEW_HASH":
   <project groups="gfxstream" name="<YOUR_REMOTE_REPO_PATH>" path="hardware/google/gfxstream" revision="<NEW_HASH>" remote="<YOUR_REMOTE_REPO_NAME>"/>
5. Run rebuild.sh
6. After rebuild the new prebuilds appears in cuttlefish_vmm/aarch64-linux-gnu folder
7. Rebuild AOSP (removing the old artifacts in out/host/linux_musl-arm64 may be handy).

NOTE:
The rebuilding script can handle building on a remote arm64 machine (which is way-way-way faster)

source build/envsetup.sh && lunch <YOUR_TARGET>
./device/google/cuttlefish_vmm/rebuild.sh --docker_arch aarch64 --arm   --arm_instance <YOUR_ARM_MACHINE> --arm_user <YOUR_USER>

[rpolitex]

@AJ-RR ⬆️