[CMake] Generate *.cpp/*.hpp with add_custom_command, reference these in add_library in another subdirectory/CMakeLists?

[Martin Zenzes]

On 01/10/2014 11:43 AM, Nils Gladitz wrote:
> On 01/10/2014 11:21 AM, Martin Zenzes wrote:
>>
>> The problem: At the time the add_library() is processed by cmake, the 
>> referenced *.cpp/*.hpp files are not yet created, hence they are not 
>> found ("Cannot find source file"). Adding the generate-target to ALL 
>> does not help, as at the target is executed to create the file 
>> _after_ the add_library() call is processed.
>>
>> Any hints?
>>
>
> I think against the "Cannot find source file" problem it would help to 
> set the "GENERATED" source file property.
> add_dependencies(mylibrary mycustomtarget) should make sure they are 
> build in the right order.
>
> Nils

Thanks. This solved my Problem, indeed!

One little quick follow-on-question. After doing:
     set(GENERATED_CPP /path/to/not/yet/created/cpp/file.cpp)
this does not work as expected:
     set_property(SOURCE ${GENERATED_CPP} PROPERTY GENERATED)
while this will works as expected:
     set_source_files_properties(${GENERATED_CPP} PROPERTIES GENERATED)

bug?

-- 
   M.Sc. Martin Zenzes
   Space Robotics

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