[CMake] how to link with a system library ?

[Mike Jackson]

On Sep 21, 2008, at 9:10 AM, Steven Samuel Cole wrote:

> Christian Ehrlicher schrieb:
>> Steven Samuel Cole schrieb:
>>> Eric Noulard schrieb:
>>>> 2008/9/21 Steven Samuel Cole <steven.samuel.cole at gmail.com>:
>>>>> I would like to link a system library into an executable, GTK in  
>>>>> this case.
>>>>> What I'm trying to do is
>>>>>
>>>>> include(FindGTK)
>>>>>
>>>>> target_link_libraries(myexec $GTK_LIBRARIES)
>>>>>
>>>>> add_executable (myexec sources)
>>>>>
>>>>> Result:
>>>>>
>>>>> CMake Error: Attempt to add link library "GTK_LIBRARIES" to  
>>>>> target "myexec"
>>>>> which is not built by this project.
>>>>>
>>>>> What am I doing wrong ?
>>>>
>>>> You may be missing curly brace around variable could you try:
>>>>
>>>>
>>>> target_link_libraries(myexec ${GTK_LIBRARIES})
>>>>
>>>
>>> Thanks for your help! :-)
>>>
>>> ${GTK_LIBRARIES} instead of $GTK_LIBRARIES fixes the CMake Error  
>>> problem, but I still get GTK link errors. Also, even though I do  
>>> include_directories(${GTK_INCLUDE_DIR}), I still get
>>> gtk/gtk.h: No such file or directory.
>>>
>>> Has anyone ever seen this working ?
>> Are you sure you have set GTK_INCLUDE_DIR at all?
>> -> cmake documentation FIND_PACKAGE() should help here
>> Christian
>
> Why would I want to set GTK_INCLUDE_DIR ?
> I want to _use_ it, so I don't have to specify include paths myself.
>
> I have read the documentation on FIND_PACKAGE() and FindGTK(), but I  
> can't seem to figure out how this is supposed to work.
>
> Could someone provide a code snippet ?
>

If you are having cmake generate makefiles then run make in the  
following fashion:

make VERBOSE=1

and carefully inspect the compile line. From that you should be able  
to deduce why gtk/gtk.h is NOT on the  include paths.

  _________________________________________________
| Mike Jackson - Principal Software Engineer      |
| BlueQuartz Software                             |
| mike.jackson at bluequartz.net                     |
| www.bluequartz.net                              |
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