Errors encountered when compiling the toolchain

[zhouqiang]

hello，

When I compiled the toolchain according to the steps in https://github.com/pulp-platform/pulp-ri...-toolchain, I encountered the following error:
/tmp/ccIifWI0.s: Assembler messages:
/tmp/ccIifWI0.s:4963: Error: unrecognized opcode `lwu a1,.LANCHOR0 2'
/tmp/ccIifWI0.s:5179: Error: unrecognized opcode `lwu a5,.LANCHOR0'
/tmp/ccIifWI0.s:5258: Error: unrecognized opcode `lwu a4,.LANCHOR0 2'
/tmp/ccIifWI0.s:5905: Error: unrecognized opcode `lwu a2,.LANCHOR0 2'
/tmp/ccIifWI0.s:5997: Error: unrecognized opcode `lwu a3,.LANCHOR0 2'
/home/lee/Downloads/pulp-riscv-gnu-toolchain/riscv-gcc/libgcc/static-object.mk:17: recipe for target 'unwind-dw2.o' failed
Make[2]: *** [unwind-dw2.o] Error 1
Make[2]: Leaving directory '/home/lee/Downloads/pulp-riscv-gnu-toolchain/build-gcc-linux-stage1/riscv32-unknown-linux-gnu/libgcc'
Makefile:11207: recipe for target 'all-target-libgcc' failed
Make[1]: *** [all-target-libgcc] Error 2
Make[1]: Leaving directory '/home/lee/Downloads/pulp-riscv-gnu-toolchain/build-gcc-linux-stage1'
Makefile:150: recipe for target 'stamps/build-gcc-linux-stage1' failed
Make: *** [stamps/build-gcc-linux-stage1] Error 2

Since I am going to install the cross complier to /home/lee/Downloads/complier, so I run the commands below ：
1./configure --prefix=/home/lee/Downloads/complier --with-arch=rv32g --with-abi=ilp32d
2.make linux


 Is the install path chosen like this? Why is there such an error? How can I resolve these errors?