2

我有一个小示例项目，我试图将动态库链接到可执行文件。

文件结构如下：

-项目

cmake_minimum_required (VERSION 3.3.2)

# Project
# --------------
project (cmakefun)

# Subdirectories
# --------------
add_subdirectory(dlibs)
add_subdirectory(exes)

# Target
# --------------
set(CMAKE_INSTALL_PREFIX "${PROJECT_SOURCE_DIR}/cmakefun")

--dlibs

----引擎.h

#pragma once
#include <iostream>

class Engine {
public:
    Engine();
    void Function();
};

----引擎.cpp

#include "engine.h"

using namespace std;
Engine::Engine(){}
void Engine::Function() {
    cout << "Function" << endl;
}

----CMakeLists.txt

# Project
# --------------
project(engine)

# Headers and Sources
# --------------
set(${PROJECT_NAME}_headers engine.h)
set(${PROJECT_NAME}_sources engine.cpp)

# Create Binaries
# --------------
add_library (${PROJECT_NAME} SHARED ${${PROJECT_NAME}_headers} ${${PROJECT_NAME}_sources})

# Target
# --------------
install(TARGETS ${PROJECT_NAME}
            RUNTIME DESTINATION bin
            LIBRARY DESTINATION lib
            ARCHIVE DESTINATION lib/static)

- 可执行程序

----main.h

#pragma once
#include <iostream>

----main.cpp

#include "main.h"
#include "../dlibs/engine.h"

int main( int argc, char* args[] ) {
    Engine a;
    a.Function();
    return 0;
}

----CMakeLists.txt

# Project
# --------------
project(exe)


set(CMAKE_VERBOSE_MAKEFILE ON)
set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)


# Headers and Sources
# --------------
set(${PROJECT_NAME}_headers "")
set(${PROJECT_NAME}_sources main.cpp)

# Create Binaries
# --------------
add_executable (${PROJECT_NAME} ${${PROJECT_NAME}_headers} ${${PROJECT_NAME}_sources})

# Linker
# --------------
target_link_libraries(${PROJECT_NAME} engine)

# Target
# --------------
install(TARGETS ${PROJECT_NAME}
            RUNTIME DESTINATION bin
            LIBRARY DESTINATION lib
            ARCHIVE DESTINATION lib/static)

这就是我运行它的方法：

mkdir build
cd build
cmake ..
make install
../cmakefun/bin/exe

我得到的错误：

dyld: Library not loaded: @rpath/libengine.dylib
Referenced from: *absolute path*/cmakefun/bin/exe
Reason: image not found
Trace/BPT trap: 5

但是，构建文件夹中生成的文件有效。据我所知，如果我使用“make install”，我需要设置相对 RPath，并且我已经尝试过：

set(CMAKE_VERBOSE_MAKEFILE ON)
set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

在 CMakteLists.txt（exe 文件夹）内，但结果相同。

我尝试了其他几种设置 RPath 的方法，但无济于事。

任何帮助是极大的赞赏。

此致

4

1 回答 1

0

我只是遇到了同样的问题，最后我可以使用这个主题 CMAKE RPATH with packaging 和 wiki https://cmake.org/Wiki/CMake_RPATH_handling来解决我的问题 。

在可执行的 CMakeLists.txt 中，您需要

# Project
projet(exe)

# set all you waft to set...
# get your sources...

# set RPATH according to the wiki
# use, i.e. don't skip the full RPATH for the build tree
SET(CMAKE_SKIP_BUILD_RPATH  FALSE)

# when building, don't use the install RPATH already
# (but later on when installing)
SET(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE) 

SET(CMAKE_INSTALL_RPATH "${my_install_path}")

# add the automatically determined parts of the RPATH
# which point to directories outside the build tree to the install RPATH
SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

# Create binaries
add_executable(my_exe ${my_sources})
# add your libraries...

# Install target
install(TARGET my_exe ${my_options})
于 2016-11-21T15:59:18.690 回答