英文:

CMake link external shared lib on linux?

问题 {#heading}

我尝试在Linux上使用CMake链接外部库。编译和构建都正常。但当我运行它时，它显示以下错误：

./test/calculator_test: error while loading shared libraries: ../../../third_party/add/lib/add.so: cannot open shared object file: No such file or directory

文件树（我删除了一些不必要的部分）：

├── CMakeLists.txt
├── build
├── src
├── test
│   ├── CMakeLists.txt
│   └── calculator
│       ├── CMakeLists.txt
│       └── calculator_test.cpp
└── third_party
    ├── add
    │   ├── include
    │   │   └── add.h
    │   └── lib
    │       └── add.so
    └── googletest
        ...

test/calculator/CMakeLists.txt：

add_library(lib-add SHARED IMPORTED)

set_target_properties(lib-add
                    PROPERTIES
                    IMPORTED_LOCATION "${PROJECT_SOURCE_DIR}/third_party/add/lib/add.so"
                    INTERFACE_INCLUDE_DIRECTORIES "${PROJECT_SOURCE_DIR}/third_party/add/include"
                    )


add_executable(calculator_test calculator_test.cpp)

target_link_libraries(calculator_test PRIVATE lib-add lib-sub)

set_target_properties(calculator_test 
                     PROPERTIES
                     RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/test"
                     COMMAND calculator_test
                     )

那么为什么会出现这个错误，如何修复它呢？ 英文:

I try to link an external libaray on Linux in CMake.
The compile and make are fine.
But when I run it, it says:

./test/calculator_test: error while loading shared libraries: ../../../third_party/add/lib/add.so: cannot open shared object file: No such file or directory

File tree (I remove some unnecessary part):

├── CMakeLists.txt
├── build
├── src
├── test
│   ├── CMakeLists.txt
│   └── calculator
│       ├── CMakeLists.txt
│       └── calculator_test.cpp
└── third_party
    ├── add
    │   ├── include
    │   │   └── add.h
    │   └── lib
    │       └── add.so
    └── googletest
        ...

test/calculator/CMakeLists.txt:

add_library(lib-add SHARED IMPORTED)

set_target_properties(lib-add
PROPERTIES
IMPORTED_LOCATION \"${PROJECT_SOURCE_DIR}/third_party/add/lib/add.so\"
INTERFACE_INCLUDE_DIRECTORIES \"${PROJECT_SOURCE_DIR}/third_party/add/include\"
)


add_executable(calculator_test calculator_test.cpp)


target_link_libraries(calculator_test PRIVATE lib-add lib-sub)

`set_target_properties(calculator_test
PROPERTIES
RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/test"
COMMAND calculator_test
)
`

So why and how to make it correct?

答案1 {#1}

得分: 0

我认为这是CMake的一个错误。

我在使用3.22.1（Ubuntu 22.04）时遇到了这个问题。升级到CMake 3.27后问题解决了。看起来这个问题在CMake 3.24中已经修复了。 英文:

I think it is a bug of cmake.

I see the problem when using 3.22.1 (Ubuntu 22.04). After upgrading to cmake 3.27 it works. It seems it was fixed in cmake 3.24.