记一次编译过程中fix error的经历

3/10/25 需要使用LLVM binding Python的功能，于是在llvm-project的build文件夹里运行

cmake -G Ninja ../llvm \
    -DLLVM_ENABLE_PROJECTS="mlir" \
    -DCMAKE_BUILD_TYPE=Release \
    -DLLVM_TARGETS_TO_BUILD="host" \
    -DLLVM_ENABLE_ASSERTIONS=ON \
    -DLLVM_INSTALL_UTILS=ON \
    -DMLIR_ENABLE_BINDINGS_PYTHON=ON \
    -DPython3_EXECUTABLE=$(which python3)

过程中出现了几个错误：

1. cmake无法找到pybind11
2. cmake无法找到nanobind

为了解决错误1，我首先pip install pybind11。安装成功后还是无法找到。然后我使用virtual environment装但是报错：× This environment is externally managed ╰─> To install Python packages system-wide, try brew install xyz, where xyz is the package you are trying to install.

于是使用brew install pybind11

brew link pybind11

brew info pybind11

另外一些debug Python package安装路径和指定安装地址的命令行“

import sys

print(sys.path)

python -c "import nanobind; print(nanobind.__path__)"

/opt/homebrew/bin/python3 -m pip install pybind11

成功之后需要修改环境变量：

export CPLUS_INCLUDE_PATH="/opt/homebrew/lib/python3.12/site-packages/nanobind/include:**********/3.12.4/Frameworks/Python.framework/Versions/3.12/include/python3.12:$CPLUS_INCLUDE_PATH"

source ~/.zshrc

安装完毕后又有找不到C++头文件的错误：

packages/nanobind/src/nb_internals.h:15:10: fatal error: 'tsl/robin_map.h' file not found 15 | #include <tsl/robin_map.h> | ^~~~~~~~~~~~~~~~~ 1 error generated.

因为网络问题，手动下载robin-map项目再添加到所需要的文件夹下：

unzip robin-map-master.zip mv robin-map-master /opt/homebrew/include/tsl