Add libbpf-bootstrap-android to directly support amd64 cross-compile to Android aarch64 #1
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Goal
Recognizing the challenges outlined in #144 on the
libbpf-bootstraprepository, where significant effort is required to cross-compile AMD64 eBPF programs to AArch64, especially in the context of user programs for the Android platform (which lacks GCC support after Android 8), I've taken the initiative to developlibbpf-bootstrap-androidto simplify this cross-compilation process.Additional Features
In cases where vendors don't expose the
"CONFIG_BTF_DEBUG_INFO"configuration option to user phones, I've implemented certain modifications to support the use of external BTF (BPF Type Format) files. This enhancement substantially enhances efficiency. Now, it's possible to build a generic Android kernel with this configuration. Subsequently, the resulting vmlinux and BTF files can be deployed to the device. Although a direct push of these files to the phone isn't the recommended approach, an alternative option is provided through BTFhubForAndroid.I would greatly appreciate your feedback on these changes and enhancements.