使用cyusb对libusb的未定义引用

时间:2018-12-13 13:39:56

标签: c++ cypress libusb-1.0

我已经下载了cypress SDK EZ-USB FX3 Software Development Kit的Linux软件。在Cypress/cyusb_linux_1.0.5/src中,有许多.cpp文件是我用make编译的,可以很好地工作。我想做一个自己的cpp项目,所以我复制了其中一个文件的代码,并尝试使用CMakeLists.txt进行编译。我有以下结构:

project/
├── include/
│   └── cyusb.h
├── src/
│   └── libcyusb.cpp
├── CMakeLists.txt
└── main.cpp

当我这样做时:

$apt list --installed | grep -i libusb
libusb-1.0-0/bionic,now 2:1.0.21-2 amd64 [installed,automatic]
libusb-1.0-0-dev/bionic,now 2:1.0.21-2 amd64 [installed]

但是,在this之后,我pkg-config --libs libusb并没有得到回应,但是我确实找到了一些东西:

$pkg-config --libs libusb-1.0
-lusb-1.0

所以我将其添加到我的CMakeLists.txt中,现在看起来像这样:

cmake_minimum_required(VERSION 3.10)
project(project)

set(CMAKE_CXX_STANDARD 14)
SET(GCC_COVERAGE_LINK_FLAGS  "-lusb-1.0")
SET(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} ${GCC_COVERAGE_LINK_FLAGS}")

file(GLOB SOURCES
        include/*.h
        src/*.cpp
        main.cpp
        )
add_executable(project ${SOURCES})

当我打make时,我得到:

[ 33%] Linking CXX executable project
CMakeFiles/project.dir/src/libcyusb.cpp.o: In function `libusb_get_descriptor':
/usr/include/libusb-1.0/libusb.h:1777: undefined reference to `libusb_control_transfer'
CMakeFiles/project.dir/src/libcyusb.cpp.o: In function `libusb_get_string_descriptor':
/usr/include/libusb-1.0/libusb.h:1799: undefined reference to `libusb_control_transfer'
CMakeFiles/project.dir/src/libcyusb.cpp.o: In function `device_is_of_interest(libusb_device*)':
project/src/libcyusb.cpp:157: undefined reference to `libusb_get_device_descriptor'
CMakeFiles/project.dir/src/libcyusb.cpp.o: In function `renumerate()':
project/src/libcyusb.cpp:208: undefined reference to `libusb_get_device_list'
project/src/libcyusb.cpp:219: undefined reference to `libusb_open'

[...] ETC [...] (you got the idea...)

1 个答案:

答案 0 :(得分:1)

您需要添加具有标准CMake机制的库。

target_link_libraries(project usb-1.0)

在常规版本中不使用变量GCC_COVERAGE_LINK_FLAGS