[CMake] add_custom_target dependency list issue

[Michael Hertling]

On 09/26/2010 02:34 AM, Szilárd Páll wrote:
> Hi,
> 
> I implemented a custom target which depends on several other targets,
> including some that I generate beforehand as custom targets and
> collect their names in a variable. However, this seems to behave in a
> strange way if I list these dependencies like this:
> 
> add_custom_target(foo COMMAND [...]
>                                 DEPENDS bar ${MORE_DEPENDENCIES}),
> 
> where ${MORE_DEPENDENCIES} contains space separated list of e.g "dep1 dep2 dep3"
> 
> The error I get with generated makefiles is:
> 
> make[3]: *** No rule to make target `path_to_bar/bar  dep1 dep2 dep3',
> needed by [...] Stop.
> 
> The strange thing is that even if I explicitly list the dependency
> names instead of passing them through the value of the
> MORE_DEPENDECIES variable, I get an error that there is no rule to
> make the respective target:
> 
>  make[3]: *** No rule to make target `dep1', needed by [...] Stop.
> 
>  What am I doing wrong? The custom targets dep1,2,3 are generated
> right before "foo", and all of them seem to work (make dep1,2,3
> succeeds).

The DEPENDS option of ADD_CUSTOM_TARGET() is meant for file-level
dependencies only; use ADD_DEPENDENCIES() for target-level ones.

Regards,

Michael