在我“制作”之后如何包含一个 C++ 库？

Question

我关注的是instructions to build arrow

git clone https://github.com/apache/arrow.git
cd arrow/cpp
mkdir release
cd release
cmake ..
make

所以现在我想利用我已经构建的库

ma​​in.cpp

#include "parquet/arrow/writer.h"

void main(int argc, char *argv[]) {
    printf("ok")
}

但它抱怨

In file included from /home/xiaodai/git/arrow/cpp/src/parquet/arrow/writer.h:24:0,
                 from main.cpp:1:
/home/xiaodai/git/arrow/cpp/src/parquet/properties.h:30:10: fatal error: parquet/parquet_version.h: No such file or directory
 #include "parquet/parquet_version.h"
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~

那么我如何告诉 gcc 使用我刚刚构建的库？

Answer 1

步骤 1. 安装

git clone https://github.com/apache/arrow.git
cd arrow/cpp
mkdir release
cd release
cmake .. -DCMAKE_INSTALL_PREFIX=<install_path> -DARROW_PARQUET=ON
make
make install

步骤 2. 编译和链接

g++ main.cpp -I<install_path>/include -L<install_path>/lib -lparquet -larrow -o main

main.cpp 应该在你尝试编译之前修复（void main，缺少;）。

编译成功后，我运行./main 并得到./main: error while loading shared libraries: libparquet.so.18: cannot open shared object file: No such file or directory，这很奇怪，因为<install_path>/lib 显然有文件libparquet.so.18！

问题是动态加载器找不到动态库。它不知道<install_path>/lib 也应该被检查，需要你的帮助：

• 将<install_path>/lib 添加到LD_LIBRARY_PATH：

  export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:<install_path>/lib
  

• 或通过将-Wl,-rpath=<install_path>/lib 添加到g++ 选项，使用rpath 将库路径硬编码到可执行文件中（通常不是一个好主意）。