[CMake] Re: ADD_DEPENDENCIES: "non-existent target"??

[Matthew Woehlke]

(Trying again as this bounced...)

Bill Hoffman wrote:
> Matthew Woehlke wrote:
>> Matthew Woehlke wrote:
>>> Matthew Woehlke wrote:
>>>> I have a project with some Doxygen doc that has examples. I want to 
>>>> add a non-default target to build the examples. I tried this:
>>>>
>>>> src/CMakeLists.txt:
>>>> ADD_CUSTOM_TARGET(examples)
>>>>
>>>> src/examples/CMakeLists.txt:
>>>> MACRO(ADD_EXAMPLE name)
>>>>     ADD_EXECUTABLE(${name} EXCLUDE_FROM_ALL ${name}.c)
>>>>     TARGET_LINK_LIBRARIES(${name} mylib)
>>>>     ADD_TEST(${name} ${CMAKE_CURRENT_BINARY_DIR}/${name})
>>>>     ADD_DEPENDENCIES(examples ${name})
>>>> ENDMACRO(ADD_EXAMPLE)
>>>> ADD_EXAMPLE(foo)
>>>>
>>>>
>>>> ...but I always get this error:
>>>> src/examples/CMakeLists.txt:5:
>>>> ADD_DEPENDENCIES Adding dependency to non-existent target: examples
>>>>
>>>>
>>>> What am I doing wrong?
>>>
>>> Ok, apparently ADD_DEPENDENCIES only works on targets *in the current 
>>> directory*. So how do I add a dependency to a top-level target in the 
>>> CMakeLists.txt of a subdirectory?
>
> Did you try ADD_SUBDIRECTORY instead of SUBDIRS?  Also, what version 
> of CMake are you using?

(For some reason, your reply is not showing up on gmane :-(.)

CMake 2.4.6.

I was able to achieve the effect I want with ADD_SUBDIRECTORY (bummer 
that not taking multiple subdirs, although it would be trivial to 
macro-ize that) by removing EXCLUDE_FROM_ALL from the examples targets 
and adding the examples directory as EXCLUDE_FROM_ALL. This works great. 
But even using ADD_DIRECTORY I can't seem to add dependencies to targets 
from parent directories, which seems like an annoying (and unexpected) 
limitation... especially since TARGET_LINK_LIBRARIES is perfectly 
capable of creating dependencies across branches.

-- 
Matthew
"What a wonderful smell you've discovered!" -- Princess Leia Organa