[yocto] Problems finding python when using a cmake recipe

[S.Jaritz at esa-grimma.de]

It works fine! Problem solved

Stefan Jaritz

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Von:    "Burton, Ross" <ross.burton at intel.com>
An:     S.Jaritz at esa-grimma.de
Kopie:  "yocto at yoctoproject.org" <yocto at yoctoproject.org>
Datum:  14.07.2016 13:05
Betreff:        Re: [yocto] Problems finding python when using a cmake 
recipe




On 14 July 2016 at 11:22, <S.Jaritz at esa-grimma.de> wrote:
I want to create a recipe for an application. This application is 
generated through cmake. In the cmake file "CMakeLists.txt" is the 
passage: 
############## 
include(FindPythonInterp) 
include(FindPythonLibs) 
.... 
add_custom_command(OUTPUT "${CMAKE_BINARY_DIR}/error.cpp" 
"${CMAKE_BINARY_DIR}/error.hpp"non_existant_file 
    COMMENT "create error.cpp" 
    COMMAND ${PYTHON_EXECUTABLE} "${CMAKE_SOURCE_DIR}/mc2cpp.py" 
"${CMAKE_SOURCE_DIR}/Common/ErrorCodes/Error_Build/Errors.mc" 
"${CMAKE_BINARY_DIR}/error" 
) 
############## 

This generates a header and a cpp file, which contains some error codes. 
When executing the cmake in my common environment it works fine. Under 
Bitbake it fails. Python is not found. 

This is because the cmake class stops cmake from finding binaries on the 
host.  I'm not convinced this is the right thing to do but haven't had the 
time to research the problem.

Add OECMAKE_FIND_ROOT_PATH_MODE_PROGRAM = "BOTH" to your recipe after 
inherit cmake and it will look for and find the Python interpretter in 
/usr/bin.

Ross
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