A Problem When Cross Compiling for RISC-V in Clang

Hello everybody,

I met a problem when cross compiling for RISC-V in Clang.

/home/test# /home/git/rvv-llvm/build/bin/clang++ --target=riscv64-unknown-linux-gnu --sysroot=/home/RISCV/sysroot/ -I /home/RISCV/riscv64-unknown-linux-gnu/include/c++/9.2.0/ -I /home/RISCV/riscv64-unknown-linux-gnu/include/c++/9.2.0/riscv64-unknown-linux-gnu/ -L /home/RISCV/lib/gcc/riscv64-unknown-linux-gnu/9.2.0/ test.cpp
/home/RISCV/bin/riscv64-unknown-linux-gnu-ld: cannot find crtbegin.o: No such file or directory
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)

The file "crtbegin.o" is actually in the directory added by the -L option.

/home/RISCV# find . -name "crtbegin.o"

I finally add a soft link of the file to finish compiling. But do you know why ld cannot find it?