Problems finding python when using a cmake recipe

Problems finding python when using a cmake recipe

[S.Jaritz]

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Hej

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.

How to configure the recipe or the configuration to get it run?

Regards!

Stefan Jaritz


------------------------------------------------------------
ESA Elektroschaltanlagen Grimma GmbH
Broner Ring 30
04668 Grimma
Telefon: +49 3437 9211 176
Telefax: +49 3437 9211 26
E-Mail: s.jaritz@esa-grimma.de
Internet: www.esa-grimma.de


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Jörg Reinker

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Re: Problems finding python when using a cmake recipe

[Burton, Ross]

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On 14 July 2016 at 11:22, <S.Jaritz@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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Re: Problems finding python when using a cmake recipe

[S.Jaritz]

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It works fine! Problem solved

Stefan Jaritz

------------------------------------------------------------
ESA Elektroschaltanlagen Grimma GmbH
Broner Ring 30
04668 Grimma
Telefon: +49 3437 9211 176
Telefax: +49 3437 9211 26
E-Mail: s.jaritz@esa-grimma.de
Internet: www.esa-grimma.de


Geschäftsführer:
Dipl.-Ing. Jörg Gaitzsch
Jörg Reinker

Sitz der Gesellschaft: Grimma
Ust.-ID: DE 141784437
Amtsgericht: Leipzig, HRB 5159
Steuernummer: 238/108/00755


Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte 
Informationen. 
Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich 
erhalten 
haben, informieren Sie bitte sofort den Absender und löschen Sie diese 
Nachricht. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser 
Mail 
ist nicht gestattet.

This e-mail may contain confidential and/or privileged information. If you 
are 
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notify the sender immediately and destroy this e-mail. Any unauthorized 
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Von:    "Burton, Ross" <ross.burton@intel.com>
An:     S.Jaritz@esa-grimma.de
Kopie:  "yocto@yoctoproject.org" <yocto@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@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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