Cmake target_link_libraries没有链接我的库
我会开始说我在Cmake问题上几乎完全愚蠢。Cmake target_link_libraries没有链接我的库
我有以下CMakeLists.txt
了的KDevelop 4.1项目:
project(uart)
find_package(KDE4 REQUIRED)
include (KDE4Defaults)
include_directories(${KDE4_INCLUDES} ${QT_INCLUDES} src/include src/include/QSerialDevce)
add_subdirectory(doc)
add_subdirectory(src)
add_subdirectory(icons)
link_directories(/usr/lib)
find_library(SERIALDEVICE_LIB qserialdeviced)
add_executable(uart ${uart_SRCS})
target_link_libraries(uart ${SERIALDEVICE_LIB})
当我尝试建立我的项目,我看到:
uart/build> make -j2
-- Found Qt-Version 4.6.3 (using /usr/bin/qmake-qt4)
-- Found X11: /usr/lib64/libX11.so
-- Found KDE 4.5 include dir: /usr/include/kde4
-- Found KDE 4.5 library dir: /usr/lib64/kde4/devel
-- Found the KDE4 kconfig_compiler4 preprocessor: /usr/bin/kconfig_compiler4
-- Found automoc4: /usr/bin/automoc4
CMake Error at CMakeLists.txt:16 (add_executable):
add_executable called with incorrect number of arguments
CMake Error: Attempt to add link library "/usr/lib/libqserialdeviced.so" to target "uart" which is not built by this project.
-- Configuring incomplete, errors occurred!
make: *** [cmake_check_build_system] Error 1
*** Failed ***
一切我读到说add_executable
和target_link_libraries
应该像我的文件的最后两行:
add_executable(uart ${uart_SRCS})
target_link_libraries(uart ${SERIALDEVICE_LIB})
如果我改变的CMakeLists.txt
这两条线把它当作:
project(uart)
find_package(KDE4 REQUIRED)
include (KDE4Defaults)
include_directories(${KDE4_INCLUDES} ${QT_INCLUDES} src/include src/include/QSerialDevce)
add_subdirectory(doc)
add_subdirectory(src)
add_subdirectory(icons)
link_directories(/usr/lib)
find_library(SERIALDEVICE_LIB qserialdeviced)
target_link_libraries(${SERIALDEVICE_LIB})
我看到:
uart/build> make -j2
-- Found Qt-Version 4.6.3 (using /usr/bin/qmake-qt4)
-- Found X11: /usr/lib64/libX11.so
-- Found KDE 4.5 include dir: /usr/include/kde4
-- Found KDE 4.5 library dir: /usr/lib64/kde4/devel
-- Found the KDE4 kconfig_compiler4 preprocessor: /usr/bin/kconfig_compiler4
-- Found automoc4: /usr/bin/automoc4
-- Configuring done
-- Generating done
-- Build files have been written to: uart/build
[ 11%] Built target doc-handbook
[ 11%] Built target uart_automoc
Linking CXX executable uart
CMakeFiles/uart.dir/uart.o: In function `uart::setupSerial()':
uart/src/uart.cpp:126: undefined reference to `AbstractSerial::AbstractSerial(QObject*)'
CMakeFiles/uart.dir/uart.o: In function `uart::setupEnumerator()':
uart/src/uart.cpp:108: undefined reference to `SerialDeviceEnumerator::SerialDeviceEnumerator(QObject*)'
CMakeFiles/uart.dir/uart.o: In function `uart::setupSerial()':
uart_/uart/src/uart.cpp:136: undefined reference to `AbstractSerial::enableEmitStatus(bool)'
CMakeFiles/uart.dir/uart.o: In function `uart::setupEnumerator()':
uart_/uart/src/uart.cpp:112: undefined reference to `SerialDeviceEnumerator::setEnabled(bool)'
collect2: ld returned 1 exit status
make[2]: *** [src/uart] Error 1
make[1]: *** [src/CMakeFiles/uart.dir/all] Error 2
make: *** [all] Error 2
*** Failed ***
这清楚地表明,target_link_libraries
没有链接我qserialdeviced
。
qserialdeviced
在/usr/lib/libqserialdeviced.so.1.0.0
,正确地连接到/usr/lib/libqserialdeviced.so
,很容易找到,如果我手动将它添加到Makefile中。
我明明尝试:
target_link_libraries(-lqserialdeviced)
没有变化。
我也试过:
if ("${SERIALDEVICE_LIB}" STREQUAL "SERIALDEVICE_LIB-NOTFOUND")
message(FATAL_ERROR "'qserialdeviced' wasn't found!")
else()
message("'qserialdeviced' found: " ${SERIALDEVICE_LIB})
endif()
但这种测试成功。图书馆被发现:
'qserialdeviced' found: /usr/lib/libqserialdeviced.so
任何人都可以请帮我理解这里会发生什么?
我使用Linux Fedora 13,cmake 2.8.0版,gcc(GCC)4.4.5 20101112(Red Hat 4.4.5-2)和kdevelop-4.1.0-1.fc13.x86_64。
谢谢我提前。
编辑:
至于建议的@DatChu,我拆我的CMakeLists.txt
在我子目录,一切对我来说很有意义了。
谢谢大家!
对于原来的CMakeLists.txt文件,这个问题是不是与target_link_libraries但add_executable
add_executable(uart ${uart_SRCS})
你在哪里设置你的uart_SRCS变量?你有
set(uart_SRCS src/blahblah.cpp src/somethingblahblah.cpp)
我想你可能会误解add_subdirectory的作用。它不会在里面添加源文件。它告诉CMake下降到该文件夹并寻找另一个CMakeLists.txt。当您的项目文件夹中有一个子项目时,通常会使用它。
如果您不想手动设置多个源文件,你也可以做
file(GLOB uart_SRCS src/*.cpp src/*.c)
缺点是,你需要以手动重新运行CMake的为它检测到新文件。请看杰克的评论,为什么这可能不是你想使用的。
你的CMakeLists.txt将最有可能成为
project(uart)
find_package(Qt4 REQUIRED)
include (${QT_USE_FILE})
find_package(KDE4 REQUIRED)
include (KDE4Defaults)
include_directories(${KDE4_INCLUDES} ${QT_INCLUDES} src/include src/include/QSerialDevice)
link_directories(/usr/lib)
file(GLOB uart_SRCS src/*.cpp src/*.h)
file(GLOB uart_HDRS include/*.h include/QSerialDevice/*.h)
find_library(SERIALDEVICE_LIB qserialdeviced)
add_executable(uart ${uart_SRCS} ${uart_HDRS})
target_link_libraries(uart ${SERIALDEVICE_LIB} ${QT_LIBRARIES})
不,我没有把它设置,但试图做类似'add_executable(UART的src/main.cpp中的src/uart.cpp ... )'。我停下脚步,因为我发现在'add_subdirectory(src)'后面重复所有源文件的名称并不是很聪明。有没有更好的方法来做到这一点?即使我尝试手动添加所有“.cpp”文件,我也必须提及erros。如果你愿意,我可以把错误放在我的帖子中。谢谢。 – j4x 2011-03-22 18:02:52
如果你可以用你现在所拥有的文件+你项目中的文件来更新原始的CMakeLists.txt,我可以建议你需要CMake – 2011-03-22 19:39:40
请不要推荐使用'file(GLOB ...)': http://www.cmake.org/pipermail/cmake/2010-July/037984.html和http://www.cmake.org/pipermail/cmake/2010-September/039562.html – 2011-03-22 19:58:56