目录属性和子目录 [英] Directory properties and subdirectories

问题描述

CMake手册，用于 set_directory_properties 声明：

设置当前目录和子目录的属性。

Set a property for the current directory and subdirectories.

对我来说，这意味着在父目录中设置的属性也应继承到所有子目录。但这似乎并非如此。考虑：

To me this suggests that properties set in a parent directory should also be inherited to all subdirectories. But this does not seem to be the case. Consider:

CMakeLists.txt

CMakeLists.txt

cmake_minimum_required(VERSION 3.0)
project(foo CXX)

set_property(DIRECTORY . PROPERTY narf "zort")

add_subdirectory(a)

get_property(res DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY narf)
message("Property read from root: " ${res})

a / CMakeLists.txt

a/CMakeLists.txt

get_property(res DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY narf)
message("Property for a read from a: " ${res})
get_property(res DIRECTORY ${CMAKE_SOURCE_DIR} PROPERTY narf)
message("Property for root directory root read from a: " ${res})

此打印：

Property for a read from a: 
Property for root directory root read from a: zort
Property read from root: zort

因此该属性只能是从设置它的目录而不是子目录中检索。使用 set_directory_properties / get_directory_properties 处理属性时，也是如此。

So the property can only be retrieved from the directory on which it was set, not the subdirectories. The same is true when using the set_directory_properties/get_directory_properties to deal with the properties.

我是否误解了 set_directory_properties 手册中的相应部分？还是仅仅是过时/错误？

Did I misinterpret the respective section in the set_directory_properties manual? Or is it simply outdated/wrong?

推荐答案

将我的评论变成答案

如果我看一下CMake的源代码，这取决于 cmPropertyDefinition 链式成员c>是真的。

If I look at CMake's source code this depends on the chained member of cmPropertyDefinition to be true.

因此，您可以通过将 INHERITED 关键字与一起使用来为自己的目录属性实现此目标define_property（）：

So you can achieve this for your own directory property by using the INHERITED keyword with define_property():

define_property(
    DIRECTORY 
    PROPERTY narf 
    INHERITED 
    BRIEF_DOCS "Brief Doc" 
    FULL_DOCS "Full Doc"
)

即使 INHERITED 文档仅说：

Even if the INHERITED documentation says only:

如果继承选项，那么当在给定命令的作用域中未设置请求的属性时， get_property（）命令将链接到下一个更高的作用域。 目录作用域链到 GLOBAL 。 目标，源和 TEST 链接到目录。

If the INHERITED option then the get_property() command will chain up to the next higher scope when the requested property is not set in the scope given to the command. DIRECTORY scope chains to GLOBAL. TARGET, SOURCE, and TEST chain to DIRECTORY.

这篇关于目录属性和子目录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！