cmake：编译共享库和可执行文件

Question

我想建立：

1. 共享库
2. 使用第 1 点中编译的共享库的可执行文件。

对于库，我有以下 CMakeLists.txt 文件：

cmake_minimum_required(VERSION 3.13.4)
project(driver C)

set(CMAKE_C_STANDARD 99)

set(LIB_PATH "../../libdriver")
include_directories(${LIB_PATH})
include_directories(driver ${LIB_PATH}/uart)

add_library(driver SHARED
        ${LIB_PATH}/libdriver.c
        ${LIB_PATH}/uart/uart.c)

我创建了LIB_PATH变量，因为 lib 编译所需的文件在树之外。

现在我有了可执行的 CMakeLists.txt，我想使用之前编译的 dll 文件。

cmake_minimum_required(VERSION 3.13.4)
project(proj_exe C)

set(CMAKE_C_STANDARD 99)

set(LIB_PATH "../../libdriver") # so I have the headers
set(MAIN_PATH "../../project") # the main.c file located here

include_directories(${LIB_PATH})
include_directories(driver ${LIB_PATH}/uart)

# what to do now to compile the executable with the dll

Answer 1

您可能希望在本地安装驱动程序库并使用 cmake 的功能生成导入脚本。 在使用 lib 的项目中，您可以使用find_package添加 dll 作为导入的目标，允许您使用target_link_library链接它：

add_library(driver SHARED
        ${LIB_PATH}/libdriver.c
        ${LIB_PATH}/uart/uart.c)

# attach the info to the target here
target_include_directories(driver PUBLIC
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/${LIB_PATH}>
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/${LIB_PATH}/uart>
    $<INSTALL_INTERFACE:include>
    $<INSTALL_INTERFACE:include/uart>
)

install(TARGETS driver EXPORT driver
    RUNTIME DESTINATION bin
    ARCHIVE DESTINATION lib
    LIBRARY DESTINATION lib
)

# usually there's a lib just containing the public headers
# that can be copied, but yours seems to contain the source files too;
# not enough info though to separate headers from sources though, so we'll just copy everything 
install(DIRECTORY ${LIB_PATH}/ DESTINATION include)
install(EXPORT base DESTINATION cmake FILE base-config.cmake)

建成后你应该可以做

cmake --install build_dir --prefix install_path

这允许您使用find_package从安装目录导入文件，假设您已将其添加到CMAKE_PREFIX_PATH

cmake -D CMAKE_PREFIX_PATH=install_path -S ... -B ...

find_package(driver REQUIRED CONFIG)

add_executable(foo ...)

target_link_libraries(foo PRIVATE driver)

您可能需要稍微调整描述中的路径以指向使用相对于当前工作目录的正确位置...