Kernel building script not working for ARM64 about tc-build HOT 2 CLOSED

You need --targets "AArch64;ARM" in do_llvm(), as the 32-bit vDSO requires the 32-bit ARM backend:

https://git.kernel.org/linus/3e6f8d1fa18457d54b20917bd9174d27daf09ab9
https://lore.kernel.org/[email protected]/
https://lore.kernel.org/CAKwvOdn7oW+ZO83-rFuGUMWBj10f=yZ=+O3ZTQ_afgQ6ossZOA@mail.gmail.com/

Alternatively, disable CONFIG_COMPAT_VDSO in kernel/build.sh but that could make 32-bit programs slower.

I really do not recommend messing with the --targets argument unless you truly know what you are doing. If you are building on an x86_64 host, you need to include X86 in your targets (e.g. --targets "AArch64;ARM;X86"), otherwise the tests will fail and you won't be able to use it for HOSTCC or HOSTLD in the kernel. You could also remove --check-targets clang lld llvm but that helps ensure that you are not getting a known buggy toolchain due to failing tests.

This is not a bug with the script so closing. I am happy to have follow up discussions if you feel something could be improved here.

from tc-build.

You need --targets "AArch64;ARM" in do_llvm(), as the 32-bit vDSO requires the 32-bit ARM backend:

https://git.kernel.org/linus/3e6f8d1fa18457d54b20917bd9174d27daf09ab9 https://lore.kernel.org/[email protected]/ https://lore.kernel.org/CAKwvOdn7oW+ZO83-rFuGUMWBj10f=yZ=+O3ZTQ_afgQ6ossZOA@mail.gmail.com/

Alternatively, disable CONFIG_COMPAT_VDSO in kernel/build.sh but that could make 32-bit programs slower.

I really do not recommend messing with the --targets argument unless you truly know what you are doing. If you are building on an x86_64 host, you need to include X86 in your targets (e.g. --targets "AArch64;ARM;X86"), otherwise the tests will fail and you won't be able to use it for HOSTCC or HOSTLD in the kernel. You could also remove --check-targets clang lld llvm but that helps ensure that you are not getting a known buggy toolchain due to failing tests.

This is not a bug with the script so closing. I am happy to have follow up discussions if you feel something could be improved here.

Okay. I'm building on an ARM64 server. After adding ARM target, it works properly now. Thank for your answer.

from tc-build.