[CMake] How to build a target on install (only)?

[David Cole]

Ah ha! Back to the simpler approach with install(CODE....!

Good idea, Nils.

Then you just need a stamp/sentinel file associated with running the
operation, and you can check it against your input.

For your "comment" line, you could use "cmake -E echo" to spit out a
comment before running the dSYM tool, and for your stamp files, after
the operation is done, you can use "cmake -E touch" to update the time
stamp on the sentinel files.


D



On Mon, Feb 16, 2015 at 9:49 AM, Nils Gladitz <nilsgladitz at gmail.com> wrote:
> On 02/16/2015 03:25 PM, Paul Smith wrote:
>>
>> On Sun, 2015-02-15 at 18:26 -0600, Iosif Neitzke wrote:
>>>
>>> For conditional file install, you could try something like "cmake -E
>>> copy_if_different".
>>
>>
>> That won't work; I don't have any files to copy.  What I want is to run
>> the dsymutil command during install only, not during the normal build
>> (because it's slow), but only if the binary that was installed has
>> changed.
>>
>> copy_if_different won't help here.
>
>
> How about custom dependency checking?
>
> e.g. something like:
>
>   if(${dependency} IS_NEWER_THAN ${output})
>     execute_process(...)
>   endif()
>
> Nils
>
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