Question

我有一个使用cmake作为构建系统的项目，我遇到链接问题。

我有一个名为lwm2mclient.h的haeader文件，它具有以下结构和指针声明。

typedef struct
{
    char binary_filename[256];
}programming;

extern programming device1;
extern programming device2;
extern programming *programmingPtr1;
extern programming *programmingPtr2;

我有一个包含lwm2mclient.h的源文件，这些文件分配指向实例的指针。

programming *programmingPtr1 = &device1;
programming *programmingPtr2 = &device2;

但是我收到错误建议

dut_object.c.o:(.data+0x0): undefined reference to DEVICE1＆＃39;`

我认为这与错误的链接有关但我无法理解cmakelists.txt文件中的错误。

这是cmakelists.txt文件，两个文件都设置为源。

如果有人可以查看，请欣赏它吗？

cmake_minimum_required (VERSION 3.0)

project (lwm2mclient)

option(DTLS "Enable DTLS" OFF)

# Compiler include
#INC1 = ~/Documents/wakaama-master-2_0/examples/IniParser/iniparser-master/src

SET(CRADLE_INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/../../../cradle-util/libcradle)

include(${CMAKE_CURRENT_LIST_DIR}/../../core/wakaama.cmake)
include(${CMAKE_CURRENT_LIST_DIR}/../shared/shared.cmake)

add_definitions(-DLWM2M_CLIENT_MODE -DLWM2M_BOOTSTRAP -DLWM2M_SUPPORT_JSON)
add_definitions(${SHARED_DEFINITIONS} ${WAKAAMA_DEFINITIONS})

include_directories (${WAKAAMA_SOURCES_DIR} ${SHARED_INCLUDE_DIRS} ${CRADLE_INCLUDE_DIR} )

set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -O0")

message("CMAKE_CXX_FLAGS_DEBUG is ${CMAKE_CXX_FLAGS_DEBUG}")

SET(SOURCES
    lwm2mclient.c
    lwm2mclient.h
    system_api.c
    object_security.c
    object_server.c
    object_device.c
    object_firmware.c
    object_location.c
    object_connectivity_moni.c
    object_connectivity_stat.c
    object_access_control.c
    test_object.c
    dut_object.c
    usb_control.c
    )

find_package(PkgConfig REQUIRED)
pkg_check_modules(GLIB_PKG glib-2.0)
message(Found glib-2.0)
include_directories(${GLIB_PKG_INCLUDE_DIRS})


add_executable(${PROJECT_NAME} ${SOURCES} ${WAKAAMA_SOURCES} ${SHARED_SOURCES})

target_link_libraries(${PROJECT_NAME} cradle.a mraa.so m pthread iniparser.a )

LINK_DIRECTORIES(/usr/local/lib /usr/lib/x86_64-linux-gnu ${CMAKE_CURRENT_LIST_DIR}/../../../cradle-util/libcradle )


# Add WITH_LOGS to debug variant
set_property(TARGET ${PROJECT_NAME} APPEND PROPERTY COMPILE_DEFINITIONS $<$<CONFIG:Debug>:WITH_LOGS>)

cmake链接错误 - 未定义的错误引用 - 在头文件中声明的结构，在源代码中不可见

0 个答案: