How to use boost_build for clang cross-compile for aarch64 version

[tron32213021]

Hi,

I have tried boost_build to build a boost from source codes, and it worked very well. But when I tried to build it as aarch64 libraries, it failed to do so. The output of libraries still stay x86_64 version.

It seems like the rule failed to use my bazel cc_toolchain. My cc_toolchain is built upon clang and can specifically use --cpu x86_64 and --cpu aarch64 to bazel. All is perfect when i use cmake rules and make rules.

Does anyone have idea about this? Thanks