topic Re: Running C++ code in Sas Analytics Pro - Sas 4 in SAS Programming

Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Fri, 17 Nov 2023 08:56:02 GMT

Hello,

I installed Sas Analytics pro in a Linux virtual machine and I am trying to run a C++ code using call system function.

I updated the file C++ from docker desktop because I don't know how to mount the local C disk to the container docker.

Running this code

data _null_;
call system("pwd");
run;

I find my directory:

Current working directory is '/tmp/SAS_work188200000688_sas-analytics-pro/SAS_work26F300000688_sas-analytics-pro'.

And to run my C++ code I am using this command that works in the linux shell but not from the docker shell and in Sas Studio.

filename oscmd pipe "/tmp/C/bld/Gross_test_01";
data _null_;
infile oscmd;
input;
put _infile_;
run;

Pipe command="/tmp/C/bld/Gross_test_01 "

/tmp/C/bld/Gross_test_01: error while loading shared libraries: libgross.so: cannot open shared object file: No such file or directory

It seems that can't be possible navigate in the directories because the file libgross.so is present. My directory is

1. Anyone knows how to mount a C: local drive or what is the kind of problem that I can't run that file from the directory?

Re: Running C++ code in Sas Analytics Pro - Sas 4

Kurt_Bremser — Fri, 17 Nov 2023 09:17:29 GMT

Issue the command set in the Linux shell to get the current settings of all environment variables, then run set from SAS with the PIPE method and look at the differences.

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Wed, 22 Nov 2023 08:19:45 GMT

I run the set command, which environment variables should I check?

Re: Running C++ code in Sas Analytics Pro - Sas 4

Kurt_Bremser — Wed, 22 Nov 2023 08:49:27 GMT

What I said. Look at the differences between the environments.

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Wed, 22 Nov 2023 09:26:06 GMT

Hello, here I put some variable but I don't know which differences are part of my issue.

Re: Running C++ code in Sas Analytics Pro - Sas 4

Kurt_Bremser — Wed, 22 Nov 2023 09:59:05 GMT

What catches my attention is your massive PATH in the Linux commandline. I suspect the problem is there.

Also check if the current working directory (PWD) has an effect; issue a cd command before you run your C++ program.

Re: Running C++ code in Sas Analytics Pro - Sas 4

Sajid01 — Wed, 22 Nov 2023 17:07:34 GMT

Hello @harmonic
Your error message indicates that the library libgross.so is not accessible. Either it is missing OR is not reachable.
Make sure you are able to run the C++ code from the command line in the same folder that the code is running using X Commands.
Make sure the user id is the same as that runs the SAS code.
If you are not able to run from the command line please post the output.

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Thu, 23 Nov 2023 12:09:26 GMT

/*test1*/
filename oscmd pipe "pwd &&  ./Gross_test_01 0.95419 0.00674 0.00367 0.02649 0.00645 0.00097 0.00096 0.00019 0.00015 0.00018 0 0 0 0 0 0.00001 0 0 0 0.00002 0 288.15 5701.325";

data _null_;
infile oscmd;
input;
put _infile_;
run;

/*
NOTE: The infile OSCMD is:
Pipe command="pwd & ./Gross_test_01 0.95419 0.00674 0.00367 0.02649 0.00645 0.00097 0.00096 0.00019 0.00015 0.00018 0 0 0 0 
0 0.00001 0 0 0 0.00002 0 288.15 5701.325"
/tmp/C/bld
./Gross_test_01: error while loading shared libraries: libgross.so: cannot open shared object file: No such file or directory
NOTE: 2 records were read from the infile OSCMD.
*/


/* test2*/
data _null_;
	call system('./Gross_test_01 0.95419 0.00674 0.00367 0.02649 0.00645 0.00097 0.00096 0.00019 0.00015 0.00018 0 0 0 0 0 0.00001 0 0 0 0.00002 0 288.15 5701.325');
	call system("pwd");
	call system("cd ..");
	call system("cd ..");
	call system("pwd");
	call system("cd C/bld/");
	call system("pwd");
	call system('./Gross_test_01 0.95419 0.00674 0.00367 0.02649 0.00645 0.00097 0.00096 0.00019 0.00015 0.00018 0 0 0 0 0 0.00001 0 0 0 0.00002 0 288.15 5701.325');
run;

/*NOTE: Current working directory is '/tmp/SAS_work2E8D0000128D_sas-analytics-pro/SAS_work1CCF0000128D_sas-analytics-pro'.
NOTE: Current working directory is '/tmp'.
NOTE: Current working directory is '/tmp/C/bld'.
NOTE: DATA statement used (Total process time):
real time 0.01 seconds
cpu time 0.01 seconds
*/

I tried different ways, in the first test I tried to go to the path and run the script but I got the error.

In the second test I don't get any error but it doesn't make any sense because in the first command I am not in the path where the c++ is located when I run the program but I don't see any error.

@Sajid01 user id is sasdemo by default but I tried from root as well:

Re: Running C++ code in Sas Analytics Pro - Sas 4

Kurt_Bremser — Thu, 23 Nov 2023 13:25:22 GMT

Expand the PATH with the entries in the commandline PATH.

Add this to your command:

export PATH=$PATH:<insert the additional entries here>;cd /tmp/C/bld;./Gross_test_01 0.95419 0.00674 0.00367 0.02649 <and so on>

Re: Running C++ code in Sas Analytics Pro - Sas 4

Sajid01 — Thu, 23 Nov 2023 15:57:36 GMT

Hello @harmonic

To give a feasible solution one needs an understanding of the environment you are in.
As I understand it,you have SAS Analytics proc on installed on Linux operating system in a virtual machine.
C++ is expected to be installed here.
I would recommend the following steps to start with.
Login to the VM (either directly or using SSH) as sasdemo (the account you are using to run the sas code).
From the commandline run the following commands to see if the library is available.

Check if libgross.so is available.
ldconfig -p | grep libgross.so
If there is no output then you have missing libgross.so

Check if you have gcc is installed
ls /usr/bin | grep c++
if there is no output c++ is not installed.

Install C++. Follow you distributions instructions.

In case you have everything available (libgross.so , c++) go to the folder wherever Gross_test_01 exists and try running it.
Needless to say C++ works as smoothly as SAS if everything is correct.

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Thu, 23 Nov 2023 16:22:21 GMT

In the linux shell I can run the code. This is my output:

My problem is that in the shell in the Docker and in sas studio I can't run this program. I have to say that I uploaded all the directories c++ from docker desktop in the virtual path because I can't find it in my local machine.

From the docker shell (white one) I can see sasdemo user, but from my linux shell (black one) not.

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Thu, 23 Nov 2023 16:23:20 GMT

Should I use this command from the docker shell, in the container where sas pro is installed?

Re: Running C++ code in Sas Analytics Pro - Sas 4

Sajid01 — Thu, 23 Nov 2023 17:51:37 GMT

Hello @harmonic
Thanks for the quick response.
In addition to the binaries and libraries, the configuration and environment variables would also be needed. That gets done when one installs the c++ natively in the docker. I don't know if that is feasible in the docker container at your end.

If this is SAS provided docker find out from them if c++/ development can be installed in the docker container.

For the present I have the following suggestions.
Please run the command ldconfig in docker container. It creates the necessary links.
Then please try running your code.

If that does not work, create the executable for Gross_test_01 with static linking of all the libraries. That includes the libraries in the executable and it should be execute in the container.

Necessary requirement for static linking is that the version of the OS should be identical in the container .and where the executable is generated.

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Fri, 24 Nov 2023 09:38:05 GMT

Did you mean that the main problem is the c++ doesn't work in the container?

Linux shell

Container shell

Re: Running C++ code in Sas Analytics Pro - Sas 4

Sajid01 — Fri, 24 Nov 2023 14:45:27 GMT

Hello @harmonic
"Did you mean that the main problem is the c++ doesn't work in the container? " No. I don't mean that.

In fact the executable Gross_test_01 is executing.

Your executable program Gross_test_01 needs to find the library libgross.so for dynamic linking at run time, but cannot find it.

This is happening because apparently c++ has not been installed in the container.Even though you have copied c++ folders, the links and relevant path/env variable information has not been updated.

(This is what you said " I updated the file C++ from docker desktop because I don't know how to mount the local C disk to the container docker".

"I uploaded all the directories c++ from docker desktop in the virtual path because I can't find it in my local machine".)

Did you get a chance to read my past two posts?

One last things try everything only on a dev system.

Re: Running C++ code in Sas Analytics Pro - Sas 4

Sajid01 — Fri, 24 Nov 2023 15:00:11 GMT

Hello @harmonic
As an after thought to what I said earlier try running this in the container before executing the Gross_test_01

export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/full_path_of_libgross.so

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Fri, 24 Nov 2023 15:33:41 GMT

Yes I am trying to install c++ in the container also compile the code in static mode.
Should I put the local path like this?
C:/C/bld/libgross.so

Re: Running C++ code in Sas Analytics Pro - Sas 4

Sajid01 — Fri, 24 Nov 2023 16:29:10 GMT

Hello @harmonic

As I said earlier run this statement before running your code.
I have made a correction only folder path needs to be included not the filename.

export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/full_path_of_folder_containing_libgross.so

Please run this immediately before running Gross_test_01. It should work. Then you would not need C++ in the container at all.
If your libraries are statically bound into Gross_test_01 and the OS in the host and docker is the same, I don't expect that C++ is needed in the container.
The basic principle is that C++ compiles a program to machine language. If all libraries are statically bound, then nothing should be needed as long as OS is the same.
The size of the executable would however be large.
However if the libraries are dynamically linked then libraries are needed.

Re: Running C++ code in Sas Analytics Pro - Sas 4

harmonic — Wed, 29 Nov 2023 14:56:19 GMT

I think this is not a Sas problem anymore, I don't know maybe is the virtual container the problem.

Re: Running C++ code in Sas Analytics Pro - Sas 4

Sajid01 — Wed, 29 Nov 2023 16:28:05 GMT

Hello
I agree it is neither a SAS nor a container problem.
It is the case of missing libraries.
My earlier replies list possible solutions.