Linux Build test

Only for build test, not runnable. But it shows the possibility of Application in Linux.

Some function is missed in LinuxCommon.cpp. The original implement use JAVA in Android.

The build environment is unbuntu24.04, clang 18.1.3. Some other changes for other download files may be required.

Now, the apk is runnable.

Now, the apk is runnable.

The first commit that is launchable

can_launcher

fix error when launcher

First commit that can be built

Cache for successful building.