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按照https://github.com/mollybuild/RISCV-Measurement/blob/master/Build-RISCV-LLVM-and-run-testsuite.md 执行交叉编译的时候,cmake报错:
xj@e2ba8bd04169:~/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build$ cmake -DCMAKE_TOOLCHAIN_FILE=/home/xj/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build/clang_riscv_linux.cmake -DCMAKE_C_COMPILER="/home/xj/RISCV/llvm-project0/build/bin/clang" ../test-suite -- The C compiler identification is Clang 13.0.0 -- The CXX compiler identification is Clang 13.0.0 -- Check for working C compiler: /home/xj/RISCV/llvm-project0/build/bin/clang -- Check for working C compiler: /home/xj/RISCV/llvm-project0/build/bin/clang -- broken CMake Error at /usr/share/cmake-3.16/Modules/CMakeTestCCompiler.cmake:60 (message): The C compiler "/home/xj/RISCV/llvm-project0/build/bin/clang" is not able to compile a simple test program. It fails with the following output: Change Dir: /home/xj/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make cmTC_c5958/fast && /usr/bin/make -f CMakeFiles/cmTC_c5958.dir/build.make CMakeFiles/cmTC_c5958.dir/build make[1]: Entering directory '/home/xj/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_c5958.dir/testCCompiler.c.o /home/xj/RISCV/llvm-project0/build/bin/clang --target=riscv64-unknown-linux-gnu --gcc-toolchain=/home/xj/RISCV/linux/ -o CMakeFiles/cmTC_c5958.dir/testCCompiler.c.o -c /home/xj/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build/CMakeFiles/CMakeTmp/testCCompiler.c Linking C executable cmTC_c5958 /usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_c5958.dir/link.txt --verbose=1 /home/xj/RISCV/llvm-project0/build/bin/clang --target=riscv64-unknown-linux-gnu --gcc-toolchain=/home/xj/RISCV/linux/ -static CMakeFiles/cmTC_c5958.dir/testCCompiler.c.o -o cmTC_c5958 /home/xj/RISCV/linux/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: warning: -z relro ignored /home/xj/RISCV/linux/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: unrecognized option '--hash-style=gnu' /home/xj/RISCV/linux/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: use the --help option for usage information clang-13: error: linker command failed with exit code 1 (use -v to see invocation) make[1]: *** [CMakeFiles/cmTC_c5958.dir/build.make:87: cmTC_c5958] Error 1 make[1]: Leaving directory '/home/xj/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build/CMakeFiles/CMakeTmp' make: *** [Makefile:121: cmTC_c5958/fast] Error 2 CMake will not be able to correctly generate this project. Call Stack (most recent call first): CMakeLists.txt:7 (project) -- Configuring incomplete, errors occurred! See also "/home/xj/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build/CMakeFiles/CMakeOutput.log". See also "/home/xj/RISCV/llvm-project0/llvm/projects/test-suite-riscv-build/CMakeFiles/CMakeError.log".
指定的target是riscv64-unknown-linux-gnu, ld用的是riscv64-unknown-elf,不一致。
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重新构建riscv-gnu-toolchain的linux函数库:
build$ mkdir linux
build$ cd linux
linux$ ../../configure --prefix=$RISCV/linux
linux$ make linux # 注意这里是make linux
cmake还是报错:
/home/xj/RISCV/linux/lib/gcc/riscv64-unknown-linux-gnu/10.2.0/../../../../riscv64-unknown-linux-gnu/bin/ld: cannot find crt1.o: No such file or directory
解决办法:修改环境变量,在~/.bashrc中的path中添加linux构建目录:~/RISCV/linux/bin 再次cmake就好了
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