如何以编程方式遍历所有CMake目标？

Question

有没有一种方法可以从顶层CMakeLists.txt中获取CMake项目的所有目标，即以编程方式迭代目标？

我之所以要这样做，是为了对每个目标应用一些特定于XCode的设置。。

if (CMAKE_GENERATOR MATCHES "Xcode")
    include(sanitize_xcode)
    sanitize_xcode(myTarget)
endif()

仅供参考-清理模块如下所示。。

macro (set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE)
    set_property (TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY} ${XCODE_VALUE})
endmacro (set_xcode_property)

macro (sanitize_xcode TARGET)
    set_xcode_property(${TARGET} GCC_GENERATE_DEBUGGING_SYMBOLS[variant=Debug] "YES")
    set_xcode_property(${TARGET} GCC_GENERATE_DEBUGGING_SYMBOLS[variant=MinSizeRel] "NO")
    set_xcode_property(${TARGET} GCC_GENERATE_DEBUGGING_SYMBOLS[variant=RelWithDebInfo] "YES")
    set_xcode_property(${TARGET} GCC_GENERATE_DEBUGGING_SYMBOLS[variant=Release] "NO")

    set_xcode_property(${TARGET} COPY_PHASE_STRIP[variant=Debug] "NO")
    set_xcode_property(${TARGET} COPY_PHASE_STRIP[variant=MinSizeRel] "YES")
    set_xcode_property(${TARGET} COPY_PHASE_STRIP[variant=RelWithDebInfo] "NO")
    set_xcode_property(${TARGET} COPY_PHASE_STRIP[variant=Release] "YES")

    set_xcode_property(${TARGET} GCC_OPTIMIZATION_LEVEL[variant=Debug] "0")
    set_xcode_property(${TARGET} GCC_OPTIMIZATION_LEVEL[variant=MinSizeRel] "s")
    set_xcode_property(${TARGET} GCC_OPTIMIZATION_LEVEL[variant=RelWithDebInfo] "3")
    set_xcode_property(${TARGET} GCC_OPTIMIZATION_LEVEL[variant=Release] "3")

    set_xcode_property(${TARGET} IPHONEOS_DEPLOYMENT_TARGET[variant=Debug] "7.0")
    set_xcode_property(${TARGET} IPHONEOS_DEPLOYMENT_TARGET[variant=MinSizeRel] "7.0")
    set_xcode_property(${TARGET} IPHONEOS_DEPLOYMENT_TARGET[variant=RelWithDebInfo] "7.0")
    set_xcode_property(${TARGET} IPHONEOS_DEPLOYMENT_TARGET[variant=Release] "7.0")
endmacro (sanitize_xcode)

Answer 1

将我的评论转化为答案

拥有所有目标的列表是一个已经存在了一段时间的愿望，但全局属性TARGETS尚未实现(截至2016年5月，see "Listing all targets" discussion)。

编辑：现在已实现:全局BUILDSYSTEM_TARGETS属性已随CMake 3.7发布

因此，您可以使用CMake脚本本身来实现这一点-作为@DevSolar作为注释/回答，或者像here一样-但我在使用CMake的过程中了解到，您也可以在全局范围内更改许多目标属性。例如，大多数目标属性默认为等效的全局变量设置。

您可以在您的案例中利用这一点，并通过将以下内容添加到您的全局CMakeLists.txt文件来解决此问题：

set(CMAKE_XCODE_ATTRIBUTE_GCC_GENERATE_DEBUGGING_SYMBOLS[variant=Debug] "YES")
set(CMAKE_XCODE_ATTRIBUTE_GCC_GENERATE_DEBUGGING_SYMBOLS[variant=MinSizeRel] "NO")
set(CMAKE_XCODE_ATTRIBUTE_GCC_GENERATE_DEBUGGING_SYMBOLS[variant=RelWithDebInfo] "YES")
set(CMAKE_XCODE_ATTRIBUTE_GCC_GENERATE_DEBUGGING_SYMBOLS[variant=Release] "NO")

set(CMAKE_XCODE_ATTRIBUTE_COPY_PHASE_STRIP[variant=Debug] "NO")
set(CMAKE_XCODE_ATTRIBUTE_COPY_PHASE_STRIP[variant=MinSizeRel] "YES")
set(CMAKE_XCODE_ATTRIBUTE_COPY_PHASE_STRIP[variant=RelWithDebInfo] "NO")
set(CMAKE_XCODE_ATTRIBUTE_COPY_PHASE_STRIP[variant=Release] "YES")

set(CMAKE_XCODE_ATTRIBUTE_GCC_OPTIMIZATION_LEVEL[variant=Debug] "0")
set(CMAKE_XCODE_ATTRIBUTE_GCC_OPTIMIZATION_LEVEL[variant=MinSizeRel] "s")
set(CMAKE_XCODE_ATTRIBUTE_GCC_OPTIMIZATION_LEVEL[variant=RelWithDebInfo] "3")
set(CMAKE_XCODE_ATTRIBUTE_GCC_OPTIMIZATION_LEVEL[variant=Release] "3")

set(CMAKE_XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET[variant=Debug] "7.0")
set(CMAKE_XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET[variant=MinSizeRel] "7.0")
set(CMAKE_XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET[variant=RelWithDebInfo] "7.0")
set(CMAKE_XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET[variant=Release] "7.0")

参考

• XCODE_ATTRIBUTE_
• CMAKE_XCODE_ATTRIBUTE_

Answer 2

在对弗洛里安的answer的修正中，BUILDSYSTEM_TARGETS不是一个真正的全局属性，而是一个directory范围的属性。增强的请求当前是open，以请求真正的全局属性。使用SUBDIRECTORIES属性，可以使用以下函数递归检索当前目录范围内的所有目标：

function(get_all_targets var)
    set(targets)
    get_all_targets_recursive(targets ${CMAKE_CURRENT_SOURCE_DIR})
    set(${var} ${targets} PARENT_SCOPE)
endfunction()

macro(get_all_targets_recursive targets dir)
    get_property(subdirectories DIRECTORY ${dir} PROPERTY SUBDIRECTORIES)
    foreach(subdir ${subdirectories})
        get_all_targets_recursive(${targets} ${subdir})
    endforeach()

    get_property(current_targets DIRECTORY ${dir} PROPERTY BUILDSYSTEM_TARGETS)
    list(APPEND ${targets} ${current_targets})
endmacro()

get_all_targets(all_targets)
message("All targets: ${all_targets}")

Answer 3

如果您想查看目标列表，请将CMakeLists.txt设置为首先提供该列表。

if ( CMAKE_GENERATOR MATCHES "Xcode" )
    include(sanitize_xcode)
endif()

# A list of executables to build
set( project_EXECUTABLES
     foo
     bar
   )

# List of sources for each executable, following some naming scheme

# foo
set( EXE_foo_SOURCES
     foo/main.c
   )

# bar
set( EXE_bar_SOURCES
     bar/main.c
   )

# For each executable in the list...
foreach( exe ${project_EXECUTABLES} )
    # declare the target...
    add_executable( ${exe} ${EXE_${exe}_SOURCES} )

    # ...and do whatever additional configuration you need
    if ( CMAKE_GENERATOR MATCHES "Xcode" )
        sanitize_xcode( ${exe} )
    endif()
endforeach()