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I’m trying to cross compile the following program called hello.c on Ubuntu22.04 x86_64 to aarch64:

void main(){}

I installed the following two dependencies:

apt-get install g++-aarch64-linux-gnu lld

The Clang version is 14.0.0.

When I compile using command clang --target=aarch64-none-linux-gnu -fuse-ld=lld hello.c -o hello --sysroot=/usr/aarch64-linux-gnu -v, I get the following error:

ld.lld: error: /usr/bin/../lib/gcc-cross/aarch64-linux-gnu/11/../../../../aarch64-linux-gnu/lib/libc.so:5: cannot find /usr/aarch64-linux-gnu/lib/libc.so.6 inside /usr/aarch64-linux-gnu
>>> GROUP ( /usr/aarch64-linux-gnu/lib/libc.so.6 /usr/aarch64-linux-gnu/lib/libc_nonshared.a  AS_NEEDED ( /usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 ) )
>>>         ^
clang: error: linker command failed with exit code 1 (use -v to see invocation)

On Ubuntu20.04 with clang10.0.0, the above command works.

However, the following command works on Ubuntu22.04 without specifying sysroot: clang --target=aarch64-none-linux-gnu -fuse-ld=lld hello.c -o hello -v.

I’m wondering what changed from clang10 to clang14 that caused this behaviour? Do I still need sysroot?