[Scilab-users] Trying to use call_scilab

[Matiasb]

Hi all, 

I am developing a simulation engine in C++ which I would like to interact
with Scilab. So, I wanted to try the call_scilab API
(https://help.scilab.org/docs/6.0.0/en_US/section_204636e951f595409bc6782bb8e1d2d9.html).
I faced some issues compiling which are now solved (I hope properly), and
now that i finally make the program compile it results in the application
hanging indefinitely because StartScilab() never returns.

Using gdb I can see the thread is stuck at
StartScilabEngine->InitializeTclTk () -> OpenTCLsci () ->
pthread_cond_wait@@GLIBC_2.3.2

Does anyone have any experience using call_scilab and can have some poiters
on what might be going on?

Thank you very much for any pointer!
Matias

*What am I running?*
I am trying to make the very basic example here to work:
https://help.scilab.org/docs/6.0.0/en_US/call_scilab.html
I followed the steps to compile and execute from here:
https://help.scilab.org/docs/6.0.0/en_US/compile_and_run_call_scilab.html

I am running exactly the code of simple_call_scilab.c, just added 2 extra
fprintf before and after the StartScilab. 

*Environment & compilation*
After a while and a bit of fighting I was able to compile and execute: I
first was trying to compile against Scilab5.5.1 (last stable version) but
the compilation did not work. Then I switched to Scilab6.0-beta-2. Then when
executing I got an error "Scilab should have 'libscijvm-disable' defined but
gets 'libscijvm' instead.". I fixed this add also -lscijvm-disable. To
execute the SCI path in the Scilab Twiki is not quite correct either.
This is what I am using to compile, link and execute:

I had downloaded and unzip the Scilab6.0-beta-2 in /home/. I am using
CENTOS6:
$> uname -a
Linux pcatd143.cern.ch 2.6.32-642.3.1.el6.x86_64 #1 SMP Wed Jul 13 10:27:00
CEST 2016 x86_64 x86_64 x86_64 GNU/Linux

*To compile&link:* 
export
LD_LIBRARY_PATH=/home/scilab-6.0.0-beta-2/lib/thirdparty/:/home/scilab-6.0.0-beta-2/lib/scilab;
gcc -o myExample -lscilab -lscijvm-disable
-L/home/scilab-6.0.0-beta-2/lib/scilab
-I/home/scilab-6.0.0-beta-2/include/scilab/ simple_call_scilab.c

*To execute:*
export SCI=/home/scilab-6.0.0-beta-2/share/scilab/
./myExample 

*What I get*
Not much... I added a fprintf before and after the StartScilab. I only see
what it is printed before StartScilab.

Using gdb to attach to the process and then getting the backtrace I see it
is stuck in  OpenTCLsci (does anyone know what is that?):

#0  0x000000340200b68c in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#1  0x00007fc1d28f6685 in OpenTCLsci () from
/afs/cern.ch/user/m/mbonaven/Download/scilab-6.0.0-beta-2//lib/scilab/libscitclsci.so.6
#2  0x00007fc1d28f687d in InitializeTclTk () from
/afs/cern.ch/user/m/mbonaven/Download/scilab-6.0.0-beta-2//lib/scilab/libscitclsci.so.6
#3  0x00007fc1d1dc22aa in StartScilabEngine (_pSEI=0x16664c0) at
src/cpp/InitScilab.cpp:252
#4  0x00007fc1d6087d4d in Call_ScilabOpen () from
/afs/cern.ch/user/m/mbonaven/Download/scilab-6.0.0-beta-2//lib/scilab/libscicall_scilab.so.6
#5  0x00007fc1d6087bb1 in StartScilab () from
/afs/cern.ch/user/m/mbonaven/Download/scilab-6.0.0-beta-2//lib/scilab/libscicall_scilab.so.6
#6  0x0000000000409e31 in quickTest::initializeScilab (this=0x16660a0) at
../atomics/test_scilab_api/quickTest.cpp:56







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