我的项目结构如下：

include (directory for header files)
src (directory for source files)
CMakeLists.txt
Build

我的CMakeLists.txt文件：

cmake_minimum_required(VERSION 3.12)
project(Gateway)
set(CMAKE_CXX_STANDARD 17)

 

# List all your source files
set(SOURCES
    src/main.cpp
    src/datamap.cpp
    src/datapoint.cpp
    src/logger.cpp
    src/meter.cpp
    src/Puller.cpp
    src/pusher.cpp
    src/resetDatapoint.cpp
    src/trace.cpp
)

 

# Create the executable target and specify the source files
add_executable(Gateway ${SOURCES})

 

# Include directories for header files
target_include_directories(Gateway PRIVATE include)

find_package(PahoMqttCpp REQUIRED)
target_link_libraries(Gateway PahoMqttCpp)

 

find_package(croncpp REQUIRED)
target_link_libraries(Gateway croncpp)

我想将UnQLite库添加到我的项目中。我从github克隆了repo，然后创建了一个构建目录，并构建了它。但是，当我在CMakelist中添加这些行以将库链接到我的项目时，我得到了一个错误。

find_library(UNQLITE_LIBRARY NAMES unqlite)
if (UNQLITE_LIBRARY)
    target_link_libraries(Gateway ${UNQLITE_LIBRARY})
else ()
    message(FATAL_ERROR "UNQLITE_LIBRARY not found")
endif ()

CMake Error at CMakeLists.txt:48 (message):
  UNQLITE_LIBRARY not found

-- Configuring incomplete, errors occurred!