On 05/08/2025 05:30 AM, Vincent Li wrote:
Hi, I tried to build kernel 6.15-rc5 bpf selftests on Loongarch machine running Fedora, the bpf test programs seems built ok, but I got liburandom_read.so build error below: LIB liburandom_read.so /usr/bin/ld: cannot find crtbeginS.o: No such file or directory /usr/bin/ld: cannot find -lstdc++: No such file or directory /usr/bin/ld: cannot find -lgcc: No such file or directory /usr/bin/ld: cannot find -lgcc_s: No such file or directory clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *** [Makefile:253: /usr/src/linux/tools/testing/selftests/bpf/liburandom_read.so] Error 1 Am I missing gcc tools for Fedora loongarch?
This is related with the cmake option when compiling Clang: "-DLLVM_HOST_TRIPLE=loongarch64-redhat-linux" You can native compile and update your Clang like this: git clone https://github.com/llvm/llvm-project.git mkdir -p llvm-project/llvm/build && cd llvm-project/llvm/build cmake .. -G "Ninja" \ -DCMAKE_BUILD_TYPE=Release \ -DLLVM_BUILD_RUNTIME=OFF \ -DLLVM_ENABLE_PROJECTS="clang;lldb" \ -DCMAKE_INSTALL_PREFIX=/usr/local/llvm \ -DLLVM_TARGETS_TO_BUILD="BPF;LoongArch" \ -DLLVM_HOST_TRIPLE=loongarch64-redhat-linux ninja -j4 sudo rm -rf /usr/local/llvm && sudo ninja install export PATH=/usr/local/llvm/bin:$PATH export LD_LIBRARY_PATH=/usr/local/llvm/lib:$LD_LIBRARY_PATH or install the fedora 42 and then use this software repo: https://mirrors.wsyu.edu.cn/fedora/linux/F42/rawhide/Everything/loongarch64/iso/ Thanks, Tiezhu
