在Arch Linux中通过CMake安装XGBoost时遇依赖目录错误

问题场景 #

从Git仓库安装XGBoost时，执行以下编译命令：

cd xgboost
mkdir build
cd build 
cmake ..

运行cmake ..时触发如下错误：

-- CMake version 3.25.0
-- xgboost VERSION: 2.1.0
CMake Error at CMakeLists.txt:227 (add_subdirectory):
The source directory

/mnt/32F6E6CAF6E68D83/Downloads/xgboost/dmlc-core

does not contain a CMakeLists.txt file.

CMake Error at cmake/Utils.cmake:198 (set_target_properties):
set_target_properties Can not find target to add properties to: dmlc
Call Stack (most recent call first):
CMakeLists.txt:307 (xgboost_target_properties)

CMake Error at cmake/Utils.cmake:270 (target_link_libraries):
Cannot specify link libraries for target "dmlc" which is not built by this
project.
Call Stack (most recent call first):
CMakeLists.txt:308 (xgboost_target_link_libraries)

-- Configuring incomplete, errors occurred!
See also "/mnt/32F6E6CAF6E68D83/Downloads/xgboost/CMakeFiles/CMakeOutput.log".

问题原因 #

dmlc-core是XGBoost依赖的核心子模块，克隆仓库时未同步拉取子模块内容，导致该目录缺失必要的CMake配置文件，进而触发编译错误。

修复步骤 #

1. 切换到xgboost主目录：

   cd /mnt/32F6E6CAF6E68D83/Downloads/xgboost
   

2. 初始化并更新所有子模块：

   git submodule init
   git submodule update
   

3. 清理旧的编译缓存并重新执行编译流程：

   rm -rf build
   mkdir build
   cd build
   cmake ..
   

内容的提问来源于stack exchange，提问作者Vaibhav Singh Chandel