LVGL CMake未定义的引用

Question

我正在学习使用LVGL，我计划使用CMake来管理项目。但是当我试图编译时，我遇到了“未定义的引用”。Project如下所示：

.
├── build
├── CMakeLists.txt    // C1
└── src
    ├── CMakeLists.txt // C2
    ├── lv_conf.h
    ├── lv_demo_conf.h
    ├── lv_demos
    │   ├── CMakeLists.txt    // C3
    │   └── src
    ├── lv_drivers
    │   ├── CMakeLists.txt    // C4
    │   ├── display
    │   ├── docs
    │   ├── gtkdrv
    │   ├── indev
    │   ├── library.json
    │   ├── LICENSE
    │   ├── lv_drivers.mk
    │   ├── lv_drv_conf_template.h
    │   ├── README.md
    │   ├── sdl
    │   ├── wayland
    │   ├── win32drv
    │   ├── win_drv.c
    │   └── win_drv.h
    ├── lv_drv_conf.h
    ├── lvgl
    │   ├── CMakeLists.txt    // C5
    │   └── src
    ├── main.c
    └── mouse_cursor_icon.c

虽然我试图使，日志如下，它似乎我没有添加包含dir或某些头文件。

[ 76%] Linking C static library liblvgl_lib.a
[ 76%] Built target lvgl_lib
Scanning dependencies of target demo
[ 76%] Building C object bin/CMakeFiles/demo.dir/main.c.o
[ 77%] Linking C executable demo
/usr/local/arm/arm-linux-musleabi-cross/bin/../lib/gcc/arm-linux-musleabi/11.2.1/../../../../arm-linux-musleabi/bin/ld: CMakeFiles/demo.dir/main.c.o: in function `main':
/home/xjt/F1C100S_LVGL_DEMO_WITH_CMAKE/src/main.c:18: undefined reference to `fbdev_init'
/usr/local/arm/arm-linux-musleabi-cross/bin/../lib/gcc/arm-linux-musleabi/11.2.1/../../../../arm-linux-musleabi/bin/ld: /home/xjt/F1C100S_LVGL_DEMO_WITH_CMAKE/src/main.c:36: undefined reference to `evdev_init'
/usr/local/arm/arm-linux-musleabi-cross/bin/../lib/gcc/arm-linux-musleabi/11.2.1/../../../../arm-linux-musleabi/bin/ld: /home/xjt/F1C100S_LVGL_DEMO_WITH_CMAKE/src/main.c:54: undefined reference to `lv_demo_widgets'
/usr/local/arm/arm-linux-musleabi-cross/bin/../lib/gcc/arm-linux-musleabi/11.2.1/../../../../arm-linux-musleabi/bin/ld: /home/xjt/F1C100S_LVGL_DEMO_WITH_CMAKE/src/main.c:58: undefined reference to `fbdev_flush'
/usr/local/arm/arm-linux-musleabi-cross/bin/../lib/gcc/arm-linux-musleabi/11.2.1/../../../../arm-linux-musleabi/bin/ld: /home/xjt/F1C100S_LVGL_DEMO_WITH_CMAKE/src/main.c:58: undefined reference to `evdev_read'
/usr/local/arm/arm-linux-musleabi-cross/bin/../lib/gcc/arm-linux-musleabi/11.2.1/../../../../arm-linux-musleabi/bin/ld: /home/xjt/F1C100S_LVGL_DEMO_WITH_CMAKE/src/main.c:58: undefined reference to `mouse_cursor_icon'
/usr/local/arm/arm-linux-musleabi-cross/bin/../lib/gcc/arm-linux-musleabi/11.2.1/../../../../arm-linux-musleabi/bin/ld: lvgl/liblvgl_lib.a(lv_extra.c.o): in function `lv_extra_init':

这是我的CMakeLists.txt，C1：

PROJECT(F1C100S_DEMO_WITH_CMAKE)

CMAKE_MINIMUM_REQUIRED(VERSION 3.5)

# INCLUDE_DIRECTORIES(./lib/gpiod/include)

# LINK_DIRECTORIES(./lib/gpiod/lib)

SET(CMAKE_C_COMPILER "arm-linux-musleabi-gcc")

SET(CMAKE_EXE_LINKER_FLAGS "-static")

ADD_COMPILE_OPTIONS(-g)

ADD_SUBDIRECTORY(src bin)

C2：

AUX_SOURCE_DIRECTORY(. SRC_LIST)

# SET(
#     ${SRC_LIST}
#     lv_drivers/indev/evdev.h
#     lv_drivers/display/fbdev.h
#     lvgl/demos/lv_demos.h
# )

ADD_SUBDIRECTORY(./lvgl)
ADD_SUBDIRECTORY(./lv_drivers)
ADD_SUBDIRECTORY(./lv_demos)

LINK_DIRECTORIES(./lvgl)
INCLUDE_DIRECTORIES(./lvgl)

SET(
    LIB_LIST
    lvgl_lib
)

SET(
    ${LIB_LIST}
    lv_drv_lib
)

SET(
    ${LIB_LIST}
    lv_demos_lib
)

SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR/bin})

ADD_EXECUTABLE(demo ${SRC_LIST})

# TARGET_LINK_LIBRARIES(demo gpiod)
TARGET_LINK_LIBRARIES(demo ${LIB_LIST})

C3：

AUX_SOURCE_DIRECTORY(./src/lv_demo_benchmark DIR_LV_DEMOS_SRC)
AUX_SOURCE_DIRECTORY(./src/lv_demo_keypad_encoder DIR_LV_DEMOS_SRC)
AUX_SOURCE_DIRECTORY(./src/lv_demo_music DIR_LV_DEMOS_SRC)
AUX_SOURCE_DIRECTORY(./src/lv_demo_stress DIR_LV_DEMOS_SRC)
AUX_SOURCE_DIRECTORY(./src/lv_demo_widgets DIR_LV_DEMOS_SRC)

ADD_LIBRARY(lv_demos_lib ${DIR_LV_DEMOS_SRC})

C3和C4类似于C2，只有AUX_SOURCE_DIRECTORY和ADD_LIBRARY。

Answer 1

对于这个问题，我有一个愚蠢的解决方案，就是将所有的.c文件添加到SRC_LIST中。

# in C2

FILE(GLOB_RECURSE SRC_LIST ./*.c)

这看起来很不寻常，因为当我用MAKEFILE构建时，它不会产生那么多.o文件。