如何在CMake中设置对象的属性

set_property命令设置属性

add_executable(main main.cpp)

# 采用 C++17 标准进行编译
set_property(TARGET main PROPERTY CXX_STANDARD 17)
# 如果编译器不支持 C++17，则直接报错（默认 OFF）
set_property(TARGET main PROPERTY CXX_STANDARD_REQUIRED ON)
# 在 Windows 系统中，运行时不启动控制台窗口，只有 GUI 界面（默认 OFF）
set_property(TARGET main PROPERTY WIN32_EXECUTABLE ON)
# 告诉编译器不要自动剔除没有引用符号的链接库（默认 OFF）
set_property(TARGET main PROPERTY LINK_WHAT_YOU_USE ON)
# 设置动态链接库的输出路径（默认 ${CMAKE_BINARY_DIR}）
set_property(TARGET main PROPERTY LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib)
# 设置静态链接库的输出路径（默认 ${CMAKE_BINARY_DIR}）
set_property(TARGET main PROPERTY ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib)
# 设置可执行文件的输出路径（默认 ${CMAKE_BINARY_DIR}）
set_property(TARGET main PROPERTY RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/bin)

set_target_properties命令批量设置属性

add_executable(main main.cpp)

set_target_properties(main PROPERTIES
    CXX_STANDARD 17
    CXX_STANDARD_REQUIRED ON
    WIN32_EXECUTABLE ON
    LINK_WHAT_YOU_USE ON
    LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib
    ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib
    RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/bin
    )

set命令全局设置属性

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_WIN32_EXECUTABLE ON)
set(CMAKE_LINK_WHAT_YOU_USE ON)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/bin)

add_executable(main main.cpp)

如何避免手动拷贝dll？

答：设置模块 xx_OUTPUT_DIRECTORY 系列属性，将xxx.dll直接输出到main所在目录。

add_library(mylib SHARED mylib.cpp mylib.h)
set_property(TARGET mylib PROPERTY RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY RUNTIME_OUTPUT_DIRECTORY_DEBUG ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY ARCHIVE_OUTPUT_DIRECTORY_DEBUG ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY LIBRARY_OUTPUT_DIRECTORY_DEBUG ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY RUNTIME_OUTPUT_DIRECTORY_RELEASE ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY ARCHIVE_OUTPUT_DIRECTORY_RELEASE ${PROJECT_BINARY_DIR})
set_property(TARGET mylib PROPERTY LIBRARY_OUTPUT_DIRECTORY_RELEASE ${PROJECT_BINARY_DIR})