[CMake] print a message during a specific build target

[Parag Chandra]

The if() statements are executed when CMake runs, because you’re basically adding logic to the “meta-build” process that generates your build system; not the build system itself. Maybe you can use “add_custom_target” to create targets which do nothing but print the desired message, and then use “add_dependencies” to tie these targets back to your original ones? So something like:

add_custom_target(“test_print” …)
add_dependencies(test test_print)




Parag Chandra
Senior Software Engineer, Mobile Team
Mobile: +1.919.824.1410

 <https://ionic.com> 

Ionic Security Inc.
1170 Peachtree St. NE STE 400, Atlanta, GA 30309













On 11/24/15, 12:04 AM, "CMake on behalf of Christopher Sean Morrison" <cmake-bounces at cmake.org on behalf of brlcad at mac.com> wrote:

>
>Hi,
>
>I’m trying to print a message for a particular build target and am a bit stuck.  I found that the IF statement has a TARGET keyword that should truthfully match for a particular build target, but it doesn’t seem to be working at least the way I’m trying to use it and would expect it to work.  Snippet in question in a top-level CMakeLists.txt file looks like this:
>
>if (TARGET check)
>  message(“special note about CHECK target…”)
>elseif (TARGET test)
>  message(“different note about TEST target…”)
>endif (TARGET check)
>
>Now what happens is that the CHECK message is printed … during cmake(!).  What I’m trying to achieve is only have those messages printed during≈ “make check” and “make test”, etc.  Ideally, I want to be able to inject a message before any target actions are taken and possibly after.
>
>I see in the docs that I can set COMMENT during add_custom_target(check …) and that should print my message before any target actions, but how can I get a similar message printed during ‘test’ or ‘all’ or some other implicit target?  Is there a better or more general way?  Thanks for your assistance.
>
>Cheers!
>Sean
>
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