使用 Cmake 构建依赖项

Question

我是 CMake 的新手，我正在尝试弄清楚如何构建依赖项。我的项目文件夹是这样组织的：

Scrubber
 -- FileIO
 -- CDEs
 -- Utilities
 -- Scrubber

FileIO、CDE 和 Utilities 是 Scrubber 中的可执行文件使用的静态库。

我希望能够从顶层目录执行单个 make 命令来构建所有内容。如果我独立构建每个库，那么当我执行顶级制作时，一切都会很好。但是，如果我不提前这样做，那么它就不会构建依赖项，并且毫不奇怪，会抱怨找不到库。

非常简单的问题：我如何使系统构建库？

洗涤器中的顶级 CMAKELIST

cmake_minimum_required(VERSION 3.2)
project(Scrubber)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

add_subdirectory(FileIO)
add_subdirectory(CDEs)
add_subdirectory(Utilities)
add_subdirectory(Scrubber)

SCRUBBER/FILEIO 中的 FILEIO CMAKELISTS

cmake_minimum_required(VERSION 3.2)
project(FileIO)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

file(GLOB SOURCE_FILES *.cpp)

add_library(FileIO STATIC ${SOURCE_FILES})

#Don't prepend with "lib"
set_target_properties(FileIO PROPERTIES PREFIX "")

SCRUBBER/CDES 中的 CDES CMAKELISTS

cmake_minimum_required(VERSION 3.2)
project(CDEs)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

set(BOOST_INCLUDE_DIR "/usr/lib/boost_1_60_0")

include_directories( ${BOOST_INCLUDE_DIR} )

file(GLOB SOURCE_FILES *.cpp)

add_library(CDEs STATIC ${SOURCE_FILES})

#Don't prepend with "lib"
set_target_properties(CDEs PROPERTIES PREFIX "")

洗涤器/实用程序中的实用程序 CMAKELIST

cmake_minimum_required(VERSION 3.2)
project(Utilities)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

set(BOOST_INCLUDE_DIR "/usr/lib/boost_1_60_0")

include_directories( ${BOOST_INCLUDE_DIR} )

file(GLOB SOURCE_FILES *.cpp)

add_library(Utilities STATIC ${SOURCE_FILES})

#Don't prepend with "lib"
set_target_properties(Utilities PROPERTIES PREFIX "")

SCRUBBER/SCRUBBER 中的 SCRUBBER CMAKELIST

cmake_minimum_required(VERSION 3.2)
project(Scrubber)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

set(BOOST_INCLUDE_DIR "/usr/lib/boost_1_60_0")
set(PROJECT_INCLUDE_DIR "..")

include_directories(${BOOST_INCLUDE_DIR} ${PROJECT_INCLUDE_DIR})

find_library(FILEIO_LIB FileIO.a HINTS ../FileIO/)
find_library(CDES_LIB CDEs.a HINTS ../CDEs/)
find_library(UTILITIES_LIB Utilities.a HINTS ../Utilities/)

file(GLOB SOURCE_FILES *.cpp)

add_executable(Scrubber ${SOURCE_FILES})

target_link_libraries(Scrubber ${FILEIO_LIB} ${CDES_LIB} ${UTILITIES_LIB})

Answer 1

这是错误的：

target_link_libraries(Scrubber ${FILEIO_LIB} ${CDES_LIB} ${UTILITIES_LIB})

如果你有库add_library(FileIO STATIC ${SOURCE_FILES})，那么你应该 写：

target_link_libraries(Scrubber FileIO )

cmake 发现这也是目标，并创建具有适当依赖关系的 make 文件，您不必使用 add_dependency 指向任何依赖关系， cmake 自动完成。至少对我来说是最新的 cmake 版本 3.5

Answer 2

CMake 包含 add_dependency 命令，可以满足您的需要。

使顶层依赖于其他顶层目标，以确保它们在构建之前构建。