Building Cantera libraries for QNX

[Roberto Paolinelli]

Hello,

I would like to use Cantera library both in Simulink and in hardware in the loop with Speedgoat target machine running with QNX OS.

As far as I know new matlab interface is not ready and it has less functionalities than C++, so I'm trying to use Cantera C++ and use legacy code to use i in Simulink.

So far in simulation properly works, but problems arise when I want to make it run on speedgoat target machine for hardware in the loop, because I need Cantera and Boost libraries built for QNX.

Does anyone know how o make it? 

Thank you very much

Roberto

[Ray Speth]

Hi Roberto,

I don't know anything about QNX or Speedgoat beyond what a quick Google search could tell me, but I think what you would need to do is cross-compile the Cantera library, where you use your (Linux/Windows) computer to compile code that will run on the QNX machine. Presumably they provide some sort of SDK with a compiler that can do this. Cantera only uses the header-only portions of Boost, so there's no need to compile anything on that front. Just having those headers available on the machine where you're compiling Cantera would be sufficient. For Cantera's other dependencies (Sundials, yaml-cpp, libfmt), if you use the Git submodules, those will all be compiled as part of the Cantera compilation process, so that should give you everything you need to use the Cantera C++ library on this target.

Regards,

Ray

[Roberto Paolinelli]

Hi Ray,

thank you very much for your kind and quick reply.

Yes I need to cross compile the library.

Speedgoat target machine is a PC-like machine with a real time OS inside making run a Simulink model for rapid prototyping and/or hardware in the loop purposes.

At the moment I don't have any SDK, I have just noticed QNX is launched during the build phase of the generated C++ code for speedgoat.

As far as I understand I can either build separately the Cantera library (but I don't know how to get compiler for QNX standalone) or specify all Cantera cpp sources and make a unique executable file in Simulink.

One question: if I clone the repo from https://github.com/Cantera/cantera, do I get all submodules too? Or how can I get them?  

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Ing. Roberto Paolinelli

Electronics Engineering & Consulting

P.IVA (Vat Number): IT 02643190420

Tel: +39 347/5308468

http://it.linkedin.com/in/RobertoPaolinelli

skype: roberto_paolinelli

[Bryan Weber]

Hi Roberto,

If you specify

git clone --recursive https://github.com/Cantera/cantera

Then it will clone all the submodules as well. If you already have copy cloned on your computer, you can run (from inside the cantera directory)

git submodule update --init --recursive

to clone the submodules.

Best,

Bryan

[Roberto Paolinelli]

Hello Bryan

thanks a lot.

Best Regards

Roberto

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[Roberto Paolinelli]

Hello,

is there an already developed makefile to build Cantera cpp source code?

If so, I should only point to the QNX compiler (e.g. qcc) and linker and change some options...

Am I right?

Thank you very much

Best Regards

Roberto

Il giorno sab 5 feb 2022 alle ore 14:17 Bryan Weber <bryan....@gmail.com> ha scritto:

To view this discussion on the web visit https://groups.google.com/d/msgid/cantera-users/edd8486e-9588-469b-a4f3-52ffa2be17ddn%40googlegroups.com.

[Ingmar Schoegl]

Ciao Roberto,

The sample folders contain Makefiles for cxx compilation, so you should be able to use those as a template. For these to work, there is one central file summarizing the compilation environment in the installed

<path_to_headers>/include/cantera/Cantera.mak

Hope this helps,

-ingmar-

[Roberto Paolinelli]

Hello Ingmar,

thank you very much for your reply.

I'm sorry but either I haven't fully understood what you mean or my explanation about the request is poor.

I need to build the whole Cantera library source code for QNX (QCC compiler).

Moreover please consider I can build from makefile with GCC and nothing more than this... :(

So I need some more help from you or he Community

On the one hand the only makefiles "like" I have found are:

1. Cantera.mak.in
2. Makefile.in

Are they bare template?

Why .in extension in those files?

What does the construct @some_text@ stand for? Is it a template?

On the other hand I have found a SConscript and Cantera website reports using scons (I don't know it), but I haven't found how to configure it to use another compiler/linker.

Can you help me with this?

Thanks a lot.

Best Regards

Roberto

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[Ingmar Schoegl]

Ciao Roberto,

Ok, that clarifies things for me a little. You guessed correctly: the files with extension '.in' are templates, and will get filled in by Cantera's build process (i.e. you can use those for building custom code once everything is compiled). That said, the entire build process depends heavily on SCons: are you able to use that on your system? (this will also require a Python installation etc.). If your system supports SCons, then the way forward would be to follow a regular 'compilation from source' routine (which may or may not work without tweaks, as QNX is not an environment that is tested). Otherwise, things may get complicated.

-ingmar-  

[Roberto Paolinelli]

Hello Ingmar,

thanks for your reply.

I have never tried to build from SCons but I guess it might be my first time: I have Python installed so that's not a problem.

One question: as I need to cross compile, where can I instruct SCons to find the path for C, C++ compilers and linker executables?

On the other hand I think the only alternative is to type my own makefile.

Thanks a lot for your feedback

Best Regards

Roberto

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[Ray Speth]

Hi Roberto,

All of the configuration options for SCons are documented here: https://cantera.org/compiling/config-options.html. The two options you're looking for are `CC` and `CXX`. SCons should generally rely on the C++ compiler to call the linker itself.

Regards,

Ray

[Roberto Paolinelli]

Hello Ray,

I have tried to launch QCC and Q++ setting their path informations in CC and CXX but it didn't work.

When I type scons build providing CC, CXX and boost_inc_dir 

C:\cantera>scons build boost_inc_dir=C:\ProgramData\MATLAB\SupportPackages\R2021b\toolbox\slrealtime\target\supportpackage\qnx710\target\qnx7\usr\include\boost CC=C:\ProgramData\MATLAB\SupportPackages\R2021b\toolbox\slrealtime\target\supportpackage\qnx710\host\win64\x86_64\usr\bin\qcc.exe CXX=C:\ProgramData\MATLAB\SupportPackages\R2021b\toolbox\slrealtime\target\supportpackage\qnx710\host\win64\x86_64\usr\bin\q++.exe

I get he following error message

file C:\cantera\SConstruct,line 1016:

Configure(confdir = .sconf_temp)

scons: Configure: Checking for C++ header file cmath...

scons: Configure: ".sconf_temp\conftest_4501b9bf892a8ba32d6185db437667f6_0.cpp" is up to date.

scons: Configure: The original builder output was:

  |.sconf_temp\conftest_4501b9bf892a8ba32d6185db437667f6_0.cpp <-

  |  |

  |  |#include <cmath>

  |  |

  |  |

  |

C:\ProgramData\MATLAB\SupportPackages\R2021b\toolbox\slrealtime\target\supportpackage\qnx710\host\win64\x86_64\usr\bin\q++.exe /Fo.sconf_temp\conftest_4501b9bf892a8ba32d6185db437667f6_0_00d12a0649b885c77ba20f3a874d07db.obj /c .sconf_temp\conftest_4501b9bf892a8ba32d6185db437667f6_0.cpp -std=c++11 -O3 -g /DNDEBUG /IC:\ProgramData\MATLAB\SupportPackages\R2021b\toolbox\slrealtime\target\supportpackage\qnx710\target\qnx7\usr\include\boost

cc: The QNX_HOST/QNX_TARGET environment variables must be set

scons: Configure: no

Those variables are in the reported batch file (Google doesn't allow me to attach it for safety reasons) I have launched in the same shell window before launching scons build process.

Here's qnxsdp-env.bat listing (there's also the .sh version for Linux)

@echo off

REM This script sets environment variables required to use this version of QNX Software Development Platform

REM from the command line. To use this script execute it in windows command shell (cmd).

set QNX_BASE=%~dp0

@echo on

set QNX_BASE=%QNX_BASE:\=/%

set QNX_TARGET=%QNX_BASE%/target/qnx7

set QNX_HOST=%QNX_BASE%/host/win64/x86_64

set QNX_CONFIGURATION_EXCLUSIVE=%USERPROFILE%/.qnx

set QNX_CONFIGURATION=%QNX_CONFIGURATION_EXCLUSIVE%

set MAKEFLAGS=-I%QNX_TARGET%/usr/include

set PATH=%QNX_HOST%/usr/bin;%QNX_BASE%/jre/bin;%QNX_BASE%/host/common/bin;%PATH%

@REM This is set to make sdp installation read-only (otherwise python will create extra files when you run debuger)

@REM If you using python for something else and need it, comment out this line

set PYTHONDONTWRITEBYTECODE=1

set TMPDIR=%TMP%

@set LICENSE_SCRIPT=%QNX_BASE%\license-env.bat

if exist %LICENSE_SCRIPT% %LICENSE_SCRIPT%

@echo on

REM Checking license

set QNX_LICENSE_FILE_LOCATION=%QNX_CONFIGURATION:/=\%\license\

set QNX_LICENSE_FILE=%QNX_LICENSE_FILE_LOCATION%licenses

set QNX_LICENSE_SOURCE_FILE=%QNX_BASE:/=\%license\licenses

IF NOT EXIST %QNX_LICENSE_FILE% (

xcopy %QNX_LICENSE_SOURCE_FILE% %QNX_LICENSE_FILE_LOCATION% /s /i /Y

)

@echo on

@REM Do not edit past this line

I think I need to make those variables visible to QNX inside the scons build process, but how can I do that?

Thanks a lot

Best Regards

Roberto

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[Ingmar Schoegl]

Hi Roberto,

You should be able to use the ‘env_vars’ option. Overall, the scons build is highly configurable, see https://cantera.org/compiling/config-options.html#scons-config

-ingmar-

[Roberto Paolinelli]

Hello Ingmar

thanks a lot

I'll take a look a be back to you asap

Thank you very much

Roberto

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