Question

我目前正在尝试将静态库包含到我的cmake项目中。当我构建项目时，我得到这样的错误：

[ 50%] Building CXX object src/CMakeFiles/MainApp.dir/main.cpp.o
[100%] Linking CXX executable MainApp
../../lib/librplidar_sdk.a(thread.o): In function `rp::hal::Thread::create(unsigned long (*)(void*), void*)':
thread.cpp:(.text+0x20): undefined reference to `pthread_create'
/../lib/librplidar_sdk.a(thread.o): In function `rp::hal::Thread::terminate()':
thread.cpp:(.text+0x48): undefined reference to `pthread_cancel'

CMakeLists.txt看起来像这样（RPlidar是静态库）：

##################################################################
#                          RPLidar SDK                           #
##################################################################
add_library(RPlidar STATIC IMPORTED)
set_property(TARGET RPlidar PROPERTY IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/lib/librplidar_sdk.a)
set_property(TARGET RPlidar APPEND PROPERTY INTERFACE_INCLUDE_DIRECTORIES
    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include/rplidar>
)

##################################################################
#                         Main Executable                        #
##################################################################
add_executable(MainApp main.cpp)
target_link_libraries(MainApp PRIVATE RPlidar)

我发现当链接器选项（-l）放在要编译的文件名的FRONT而不是它后面时会出现这种错误。但我不知道如何在我的cmake配置中解决这个问题。

Answer 1

您必须关联pthread：

target_link_libraries(MainApp PRIVATE pthread RPlidar)

CMake项目链接静态库

1 个答案: