Re: [CMake] Executing python though CMake and linking libraries

2016-11-28 Thread Kit Chambers

I just got this working, so am posting to the list in case this helps someone 
else in the future. Essentially you invoke the python script through CMakes -E 
command and specify your library paths so it picks up all your shared 
libraries. Something like:

add_custom_target(run
   COMMAND cmake "-E" "env"  “LD_LIBRARY_PATH=/your/library/path 
DYLD_LIBRARY_PATH=/library/path/for/mac/" “python” “./myscript.py”
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
) 

However, I will be the first to admit this is not a particularly elegant 
solution so I would be interested to here if anyone out there has a better way 
of getting invoked commands to pick up the environment paths correctly.

Kit




> On 25 Nov 2016, at 13:23, tonka3...@gmail.com wrote:
> 
> Hey,
> 
> I think your actual working directory is wrong. I would recommend to use 
> absolute paths for the python interperter (there is a find_package module for 
> the interpreter) and maybe also for your script. The custom command support a 
> workingdirectory variable as far as i know.
> 
> Hope that help you.
> 
> Greetings
> Tonka
> 
>> Am 25.11.2016 um 10:04 schrieb Kit Chambers :
>> 
>> I have a Cmake custom target which runs a python script:
>> 
>> add_custom_target(run
>>COMMAND python myscript.py
>> ) 
>> 
>> And the script myscript.py imports a Compiled library 
>> 
>> import myproj.mylilb
>> 
>> where mylib is actually a C++ library generated with python bindings (using 
>> vtkPython). This intern links against some other C++ libraries I use etc.
>> 
>> 
>> When I run the script normally from the command line everything works fine, 
>> but if I try to run the target I get linker errors.
>> 
>> $ make run
>> 
>> Traceback (most recent call last):
>> File "myscript.py", line 8, in 
>>  import myproj.mylilb
>> ImportError: 
>> dlopen(/Users/kitchambers/Applications/ogFramework/lib/python2.7/site-packages/myproj/mylib.so,
>>  2): Library not loaded: libSpProcSupport.so
>> Referenced from: 
>> /Users/kitchambers/Applications/ogFramework/lib/python2.7/site-packages/myproj/mylib.so
>> Reason: image not found
>> 
>> To me it looks like my LD_LIBRARY_PATH and DYLD_LIBRARY_PATH are not being 
>> passed through CMake to Python so it cannot find all the necessary sub 
>> libraries. However, i cannot work out how to pass this information through.
>> 
>> Any help would be greatly appreciated.
>> 
>> Cheers
>> 
>> Kit
>> -- 
>> 
>> Powered by www.kitware.com
>> 
>> Please keep messages on-topic and check the CMake FAQ at: 
>> http://www.cmake.org/Wiki/CMake_FAQ
>> 
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>> information on each offering, please visit:
>> 
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Re: [CMake] Executing python though CMake and linking libraries

2016-11-25 Thread Kit Chambers

Hmmm… I get the same error if I use absolute paths.

I don’t really understand why the shell environment used to launch CMake and 
make is not being inherited by the executed commands. 

Kit

> On 25 Nov 2016, at 13:23, tonka3...@gmail.com wrote:
> 
> Hey,
> 
> I think your actual working directory is wrong. I would recommend to use 
> absolute paths for the python interperter (there is a find_package module for 
> the interpreter) and maybe also for your script. The custom command support a 
> workingdirectory variable as far as i know.
> 
> Hope that help you.
> 
> Greetings
> Tonka
> 
>> Am 25.11.2016 um 10:04 schrieb Kit Chambers :
>> 
>> I have a Cmake custom target which runs a python script:
>> 
>> add_custom_target(run
>>COMMAND python myscript.py
>> ) 
>> 
>> And the script myscript.py imports a Compiled library 
>> 
>> import myproj.mylilb
>> 
>> where mylib is actually a C++ library generated with python bindings (using 
>> vtkPython). This intern links against some other C++ libraries I use etc.
>> 
>> 
>> When I run the script normally from the command line everything works fine, 
>> but if I try to run the target I get linker errors.
>> 
>> $ make run
>> 
>> Traceback (most recent call last):
>> File "myscript.py", line 8, in 
>>  import myproj.mylilb
>> ImportError: 
>> dlopen(/Users/kitchambers/Applications/ogFramework/lib/python2.7/site-packages/myproj/mylib.so,
>>  2): Library not loaded: libSpProcSupport.so
>> Referenced from: 
>> /Users/kitchambers/Applications/ogFramework/lib/python2.7/site-packages/myproj/mylib.so
>> Reason: image not found
>> 
>> To me it looks like my LD_LIBRARY_PATH and DYLD_LIBRARY_PATH are not being 
>> passed through CMake to Python so it cannot find all the necessary sub 
>> libraries. However, i cannot work out how to pass this information through.
>> 
>> Any help would be greatly appreciated.
>> 
>> Cheers
>> 
>> Kit
>> -- 
>> 
>> Powered by www.kitware.com
>> 
>> Please keep messages on-topic and check the CMake FAQ at: 
>> http://www.cmake.org/Wiki/CMake_FAQ
>> 
>> Kitware offers various services to support the CMake community. For more 
>> information on each offering, please visit:
>> 
>> CMake Support: http://cmake.org/cmake/help/support.html
>> CMake Consulting: http://cmake.org/cmake/help/consulting.html
>> CMake Training Courses: http://cmake.org/cmake/help/training.html
>> 
>> Visit other Kitware open-source projects at 
>> http://www.kitware.com/opensource/opensource.html
>> 
>> Follow this link to subscribe/unsubscribe:
>> http://public.kitware.com/mailman/listinfo/cmake

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[CMake] Executing python though CMake and linking libraries

2016-11-25 Thread Kit Chambers
I have a Cmake custom target which runs a python script:

add_custom_target(run
 COMMAND python myscript.py
  ) 

And the script myscript.py imports a Compiled library 

import myproj.mylilb

where mylib is actually a C++ library generated with python bindings (using 
vtkPython). This intern links against some other C++ libraries I use etc.


When I run the script normally from the command line everything works fine, but 
if I try to run the target I get linker errors.

$ make run

Traceback (most recent call last):
 File "myscript.py", line 8, in 
   import myproj.mylilb
ImportError: 
dlopen(/Users/kitchambers/Applications/ogFramework/lib/python2.7/site-packages/myproj/mylib.so,
 2): Library not loaded: libSpProcSupport.so
 Referenced from: 
/Users/kitchambers/Applications/ogFramework/lib/python2.7/site-packages/myproj/mylib.so
 Reason: image not found

To me it looks like my LD_LIBRARY_PATH and DYLD_LIBRARY_PATH are not being 
passed through CMake to Python so it cannot find all the necessary sub 
libraries. However, i cannot work out how to pass this information through.

Any help would be greatly appreciated.

Cheers

Kit
-- 

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