[CMake] What is a utility target ?

[Craig Scott]

There may be a way to tell, but nothing is coming to mind at the moment.
Maybe someone else on the list can chime in?


On Thu, Jul 28, 2016 at 5:36 AM, Azharuddin Mohammed <
azharudd at codeaurora.org> wrote:

> Thanks for the explanation, Craig. Is there a way to detect if the target
> was a physical file created using add_library/add_executable, or a
> utility target created using add_custom_target  in order to conditionally
> call the target_link_libraries command ? There is the condition if(TARGET
> target-name) , but according to the documentation it returns true for any existing
> logical target name such as those created by the *add_executable()*
> <https://cmake.org/cmake/help/v3.0/command/add_executable.html#command:add_executable>
> , *add_library()*
> <https://cmake.org/cmake/help/v3.0/command/add_library.html#command:add_library>,
> or *add_custom_target()*
> <https://cmake.org/cmake/help/v3.0/command/add_custom_target.html#command:add_custom_target>
>  commands.
>
>
>
> *From:* Craig Scott [mailto:craig.scott at crascit.com]
> *Sent:* Monday, July 25, 2016 1:52 PM
> *To:* Azharuddin Mohammed <azharudd at codeaurora.org>
> *Cc:* CMake <cmake at cmake.org>
> *Subject:* Re: [CMake] What is a utility target ?
>
>
>
> In the context of that particular part of the CMake documentation, it is
> referring to targets that are not created by add_library() or
> add_executable(). Targets created by add_custom_target() are not something
> CMake knows what to do with if you give them to the target_link_libraries()
> command, since these custom targets may not (and typically won't)
> correspond to a physical file being created (that's what
> add_custom_command() is for). So the term *utility target* can be thought
> of as being a custom target you create for convenience, but not something
> which actually corresponds to a library or executable. Examples of utility
> targets that CMake will automatically create for you include things like
> *all*, *test*, *package*, etc.
>
>
>
>
>
> On Tue, Jul 26, 2016 at 6:39 AM, Azharuddin Mohammed <
> azharudd at codeaurora.org> wrote:
>
> Hi
>
>
>
> CMake Policy CMP0039 (
> https://cmake.org/cmake/help/v3.0/policy/CMP0039.html) mentions that “Utility
> targets may not have link dependencies” . Can someone please explain what
> does “utility targets” mean ?
>
>
>
> Thanks
>
>
>
> -
>
> Azhar
>
>
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> Craig Scott
>
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> http://crascit.com
>



-- 
Craig Scott
Melbourne, Australia
http://crascit.com
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