[CMake] Generate and install a file

[Norton Allen]

On 3/28/2019 4:12 PM, Kyle Edwards wrote:
> One more thing: if you want the custom target to be built by "make" or 
> "make all", you have to give it the ALL argument:
>
> add_custom_target(mygeneratedtarget ALL
> DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/mygeneratedfile
> )
>
> Otherwise you can build the target with "make mygeneratedtarget".
>
OK! That does make a difference. I had focused on the add_custom_target 
documentation that indicated the rule was always considered out of date, 
and jumped to the conclusion that that meant it was always run.

Thank you for sorting that out!

What I find surprising is that 'make install' could not identify how to 
create mygeneratedfile. Is there some reason why 'mygeneratedfile' 
cannot be a target in its own right with needing to refer to this phony 
target to achieve the desired result?

Related to that, I noticed in another thread the mention of 
'CMAKE_SKIP_INSTALL_ALL_DEPENDENCY'. If that were set in this case, how 
could I indicate that install depends on mygeneratedtarget? (Admittedly, 
I'm having a hard time coming up with a case where this would apply, but 
I'm having trouble with the tenuous connection between the instruction 
to install mygeneratedfile and the rule that actually generates it.)

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://cmake.org/pipermail/cmake/attachments/20190328/9cee295a/attachment.html>