[julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Hello again,
And once again thanks for the constant support you are providing it has been
really helpful so far.
So, I did follow all of the steps you suggested and cp the directory with 
the name
with the big number to an other file changed the soft link and also the 
make file,
and this did finally work!
So, I am really grateful for your persistant help and support.
Now I will focus in the other problem I am facing in the new post regarding 
trying
to call c++ function from julia that inside them calling other julia 
functions.
As I will be afk today for the rest of the day probably will return on this 
until tomorrow.
Once again thanks for all the help and support is much appreciated!


On Monday, June 22, 2015 at 3:03:31 PM UTC+2, Kostas Tavlaridis-Gyparakis 
wrote:
>
> Hello,
> I am trying to embed Julia in C++ but I currently face some sort of issues.
> I am trying to follow the instructions shown here 
> .
> First things first, I run Ubuntu 15.04 and my Julia version is v. 0.3.2 
> (it's the 
> version that is automatic installed when installing julia from ubuntu 
> center).
> I use eclipse for my C++ projects, yet again I have the following issues, 
> ac-
> cording to the instructions before trying to write any julia code in C or 
> C++ you
> need first to:
> 1) link the julia library (assuming I undersand correctly this refers to  
> libjulia.so),
> which should be located in "Julia_DIR/usr/lib", yet again in my julia 
> directory
> there is no folder under the name usr. I did though find a libjulia.so 
> file in an
> other directory of my pc ("/usr/lib/x86_64-linux-gnu/julia") and added 
> this one
> instead.
> 2) include the path of julia.h which should be located in 
> "Julia_DIR/inclue/julia"
> now again in my julia directory there are no such folders and in general 
> there
> is nowhere in my pc any file such as julia.h. I did sth that is probably 
> wrong 
> and stupid but couldn't come up with anything else I downloaded this 
>  and I
> included the location of where julia.h is located to eclipse as well with 
> the direc-
> tions of all the other header files that were inculuded inside julia.h.
>
> Now when in Eclipse I am trying to compile and run a few simple julia 
> commands
> having included julia.h i receive an error saying that there is no uv.h 
> file in my
> system which is needed in one of the julia header files.
> I know that my whole approach is wrong, but yet again I couldn't find 
> anywhere
> in my pc the proper folders or files in order to follow the steps that 
> were sugges-
> ted in the julia website for running julia code inside C++.
> Any help would be much appreciated.
>
> Also, one more thing I wanted to ask is the following, in general writing 
> Julia
> code inside a C++ code is limited?
> What I want to do in general is write a JuMP model inside C++, so in 
> general
> is this possible, in the sense that by embedding Julia inside C++, will I 
> be able
> to use all of the tools and code of Julia language or is this only limited 
> to a cer-
> tain amount of commands and packages?
>

Re: [julia-users] Re: Embedding Julia with C++

[Jeff Waller]

> Your path for includes doesn't have julia/src, which is where julia.h 
> lives.
>

This is in part true, but is not the whole story.  Yes it is true that 
julia.h is found
in src in the source directory tree, but the file julia.h as well as julia 
the executable,
libjulia, etc get copied into the "installed" directory structure when 
"make install"
is executed.  It's that structure that should be used (and optionally 
lifted/copied
out of the build and put somewhere else) and in that tree, the src 
directory does
not exist. Nor does it exist in any packaged version of Julia, so it would 
be
better to assume that structure as this whole approach can eventually be 
applied
to releases, nightly builds, etc.

I think what is going on is even though Kostas is performing a "make 
install" he's 
continuing to use the source directory structure instead of the installed
directory structure which is causing confusion -- for both julia-config and 
me.

> jl_init_with_image("/home/kostav/julia/usr/lib/julia", "sys.so");

This is unfortunate if required, it should not be required.

It's good that something is working now, however, can we try one more thing

Perform make install again, and note the directory (it will be something 
like julia-)
where  is some hexadecimal number that all of this gets installed
to as described above, and copy that entire tree elsewhere (using cp -a), 
 you can change
the name if you want, it's not necessary to preserve the name of the 
directory.  Once that is done
change the PATH and/or use symbolic links if that's more convenient so that 
julia is
the julia in THAT directory not the one in the source tree.

Then revert back to the cut-and-paste Makefile version rather than this 
modified
version but keep the old one around somewhere just in case it does't work 
out
so you don't have to re-create it from scratch.  That way if this attempt 
ultimately
fails, you can as least have something going with what you have now by 
switching
PATH back to what it is now.

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Ok, thanks a lot for all your help for the moment I stay with just using a 
makefile
and include the paths following the above example case that does work.

On Tuesday, July 14, 2015 at 2:50:18 PM UTC+2, Scott Jones wrote:
>
> Your path for includes doesn't have julia/src, which is where julia.h 
> lives.
>
> On Tuesday, July 14, 2015 at 7:13:27 AM UTC-4, Kostas Tavlaridis-Gyparakis 
> wrote:
>>
>>
>>
>>
>> *>Related, what's in the directory /home/kostav/julia/usr/lib*When I run 
>> the following command: 
>>
>> g++ -o test main.cpp -Wl,-rpath,/home/kostav/julia/usr/lib -I 
>> /home/kostav/julia/src -I /home/kostav/julia/usr/include -I 
>> /home/kostav/julia/src/support -L/home/kostav/julia/usr/lib -ljulia 
>> -lLLVM-3.7svn
>>
>> And I also initialize julia inside c++ with the following command:
>>
>> jl_init_with_image("/home/kostav/julia/usr/lib/julia", "sys.so");
>>
>> It does work properly finally!
>>
>>
>>
>> *>Where is it?  Use that instead.*It's located at 
>> /home/kostav/julia/usr/bin/julia
>>
>> Yet again when I upgrade the makefile accordingly and it does look like 
>> this:
>>
>> CFLAGS   += $(shell /home/kostav/julia/usr/bin/julia  
>> /home/kostav/julia/contrib/julia-config.jl --cflags)
>> CXXFLAGS += $(shell /home/kostav/julia/usr/bin/julia  
>> /home/kostav/julia/contrib/julia-config.jl --cflags)
>> LDFLAGS  += $(shell /home/kostav/julia/usr/bin/julia  
>> /home/kostav/julia/contrib/julia-config.jl --ldflags)
>> LDLIBS   += $(shell /home/kostav/julia/usr/bin/julia  
>> /home/kostav/julia/contrib/julia-config.jl --ldlibs)
>> all: embed_example
>>
>> I do receive the following error:
>>
>> cc -DJULIA_INIT_DIR=\"/home/kostav/julia/usr/lib\" 
>> -I/home/kostav/julia/usr/include/julia  -L/home/kostav/julia/usr/lib  
>> embed_example.c  -Wl,-rpath,/home/kostav/julia/usr/lib -ljulia -o 
>> embed_example
>> embed_example.c:1:19: fatal error: julia.h: No such file or directory
>>  #include 
>>^
>> compilation terminated.
>> : recipe for target 'embed_example' failed
>> make: *** [embed_example] Error 1
>>
>>

Re: [julia-users] Re: Embedding Julia with C++

[Scott Jones]

Your path for includes doesn't have julia/src, which is where julia.h lives.

On Tuesday, July 14, 2015 at 7:13:27 AM UTC-4, Kostas Tavlaridis-Gyparakis 
wrote:
>
>
>
>
> *>Related, what's in the directory /home/kostav/julia/usr/lib*When I run 
> the following command: 
>
> g++ -o test main.cpp -Wl,-rpath,/home/kostav/julia/usr/lib -I 
> /home/kostav/julia/src -I /home/kostav/julia/usr/include -I 
> /home/kostav/julia/src/support -L/home/kostav/julia/usr/lib -ljulia 
> -lLLVM-3.7svn
>
> And I also initialize julia inside c++ with the following command:
>
> jl_init_with_image("/home/kostav/julia/usr/lib/julia", "sys.so");
>
> It does work properly finally!
>
>
>
> *>Where is it?  Use that instead.*It's located at 
> /home/kostav/julia/usr/bin/julia
>
> Yet again when I upgrade the makefile accordingly and it does look like 
> this:
>
> CFLAGS   += $(shell /home/kostav/julia/usr/bin/julia  
> /home/kostav/julia/contrib/julia-config.jl --cflags)
> CXXFLAGS += $(shell /home/kostav/julia/usr/bin/julia  
> /home/kostav/julia/contrib/julia-config.jl --cflags)
> LDFLAGS  += $(shell /home/kostav/julia/usr/bin/julia  
> /home/kostav/julia/contrib/julia-config.jl --ldflags)
> LDLIBS   += $(shell /home/kostav/julia/usr/bin/julia  
> /home/kostav/julia/contrib/julia-config.jl --ldlibs)
> all: embed_example
>
> I do receive the following error:
>
> cc -DJULIA_INIT_DIR=\"/home/kostav/julia/usr/lib\" 
> -I/home/kostav/julia/usr/include/julia  -L/home/kostav/julia/usr/lib  
> embed_example.c  -Wl,-rpath,/home/kostav/julia/usr/lib -ljulia -o 
> embed_example
> embed_example.c:1:19: fatal error: julia.h: No such file or directory
>  #include 
>^
> compilation terminated.
> : recipe for target 'embed_example' failed
> make: *** [embed_example] Error 1
>
>

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

*>Related, what's in the directory /home/kostav/julia/usr/lib*When I run 
the following command: 

g++ -o test main.cpp -Wl,-rpath,/home/kostav/julia/usr/lib -I 
/home/kostav/julia/src -I /home/kostav/julia/usr/include -I 
/home/kostav/julia/src/support -L/home/kostav/julia/usr/lib -ljulia 
-lLLVM-3.7svn

And I also initialize julia inside c++ with the following command:

jl_init_with_image("/home/kostav/julia/usr/lib/julia", "sys.so");

It does work properly finally!



*>Where is it?  Use that instead.*It's located at 
/home/kostav/julia/usr/bin/julia

Yet again when I upgrade the makefile accordingly and it does look like 
this:

CFLAGS   += $(shell /home/kostav/julia/usr/bin/julia  
/home/kostav/julia/contrib/julia-config.jl --cflags)
CXXFLAGS += $(shell /home/kostav/julia/usr/bin/julia  
/home/kostav/julia/contrib/julia-config.jl --cflags)
LDFLAGS  += $(shell /home/kostav/julia/usr/bin/julia  
/home/kostav/julia/contrib/julia-config.jl --ldflags)
LDLIBS   += $(shell /home/kostav/julia/usr/bin/julia  
/home/kostav/julia/contrib/julia-config.jl --ldlibs)
all: embed_example

I do receive the following error:

cc -DJULIA_INIT_DIR=\"/home/kostav/julia/usr/lib\" 
-I/home/kostav/julia/usr/include/julia  -L/home/kostav/julia/usr/lib  
embed_example.c  -Wl,-rpath,/home/kostav/julia/usr/lib -ljulia -o 
embed_example
embed_example.c:1:19: fatal error: julia.h: No such file or directory
 #include 
   ^
compilation terminated.
: recipe for target 'embed_example' failed
make: *** [embed_example] Error 1

Re: [julia-users] Re: Embedding Julia with C++

[Jeff Waller]

It returns: -Wl,-rpath,/home/kostav/julia/usr/lib -ljulia
>

Ok next test, what happens when you paste that into the almost working
step above (the one the works except for when you run it, it can't find 
libjulia?
make sure that -ljulia and -lLLVM3.7svn come after the -Wl,rpath directives

Related, what's in the directory /home/kostav/julia/usr/lib
 

>
>
> *>**Did you do a make install of Julia itself and are running out of that*
> *>installed directory or are you running out of where it compiled or 
> possibly*
> *>simply copied the directories? That script assumes the former and I 
> think*
>
> *>maybe you're doing the latter.*
> I downloaded the source code in folder (home/julia) and run inside this 
> file make 
> and make install of Julia inside.
>

This should result in a directory with a hex-number associated, didn't it?
 

>
> *>**/home/kostav/julia/bin/julia  /home/kostav/julia/contrib/*julia-config.jl 
>  --ldlibs
>
> I actually don't have any bin folder inside my julia folder, so I can't do 
> any of
> the suggested modifications.
> What could I do different in this case?
>

Where is it?  Use that instead.
 

>
>
>
>
>
>
>
> On Monday, July 13, 2015 at 7:55:10 PM UTC+2, Jeff Waller wrote:
>
>
>
>
>  
>
>>
>> On Monday, July 13, 2015 at 11:36:34 AM UTC-4, Kostas 
>> Tavlaridis-Gyparakis wrote:
>>>
>>> Ok, my current Julia version (that I installed via running the source 
>>> code) is: 
>>> *Version 0.4.0-dev+5841 (2015-07-07 14:58 UTC)*So, what should I do 
>>> different so that -I flag gets the proper value?
>>>
>>
>> Could you run /home/kostav/julia/contrib/julia-config.jl  --ldlibs and 
>> tell me what it returns?
>>
>> Did you do a make install of Julia itself and are running out of that
>> installed directory or are you running out of where it compiled or 
>> possibly
>> simply copied the directories? That script assumes the former and I think
>> maybe you're doing the latter.
>>
>> If so you can still use it, but you have to specify which julia so 
>> something like this
>>
>> /home/kostav/julia/bin/julia  /home/kostav/julia/contrib/julia-config.jl 
>>  --ldlibs
>>
>> is there any difference?  To get something working, cut-paste the output 
>> to the
>> semi-working step above
>>
>> to use in a Makefile modify to 
>>
>> $(shell /home/kostav/julia/bin/julia 
>> /home/kostav/julia/contrib/julia-config.jl --cflags) 
>>
>> etc
>>
>

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Hello,
Sorry for the delay in my answer.



*>Could you run /home/kostav/julia/contrib/julia-config.jl  --ldlibs and 
tell me what it returns?*It returns: -Wl,-rpath,/home/kostav/julia/usr/lib 
-ljulia

*>**Did you do a make install of Julia itself and are running out of that*
*>installed directory or are you running out of where it compiled or 
possibly*
*>simply copied the directories? That script assumes the former and I think*

*>maybe you're doing the latter.*
I downloaded the source code in folder (home/julia) and run inside this 
file make 
and make install of Julia inside.

*>**/home/kostav/julia/bin/julia  /home/kostav/julia/contrib/*julia-config.jl 
 --ldlibs

I actually don't have any bin folder inside my julia folder, so I can't do 
any of
the suggested modifications.
What could I do different in this case?







On Monday, July 13, 2015 at 7:55:10 PM UTC+2, Jeff Waller wrote:




 

>
> On Monday, July 13, 2015 at 11:36:34 AM UTC-4, Kostas Tavlaridis-Gyparakis 
> wrote:
>>
>> Ok, my current Julia version (that I installed via running the source 
>> code) is: 
>> *Version 0.4.0-dev+5841 (2015-07-07 14:58 UTC)*So, what should I do 
>> different so that -I flag gets the proper value?
>>
>
> Could you run /home/kostav/julia/contrib/julia-config.jl  --ldlibs and 
> tell me what it returns?
>
> Did you do a make install of Julia itself and are running out of that
> installed directory or are you running out of where it compiled or possibly
> simply copied the directories? That script assumes the former and I think
> maybe you're doing the latter.
>
> If so you can still use it, but you have to specify which julia so 
> something like this
>
> /home/kostav/julia/bin/julia  /home/kostav/julia/contrib/julia-config.jl 
>  --ldlibs
>
> is there any difference?  To get something working, cut-paste the output 
> to the
> semi-working step above
>
> to use in a Makefile modify to 
>
> $(shell /home/kostav/julia/bin/julia 
> /home/kostav/julia/contrib/julia-config.jl --cflags) 
>
> etc
>

Re: [julia-users] Re: Embedding Julia with C++

[Jeff Waller]

On Monday, July 13, 2015 at 11:36:34 AM UTC-4, Kostas Tavlaridis-Gyparakis 
wrote:
>
> Ok, my current Julia version (that I installed via running the source 
> code) is: 
> *Version 0.4.0-dev+5841 (2015-07-07 14:58 UTC)*So, what should I do 
> different so that -I flag gets the proper value?
>

Could you run /home/kostav/julia/contrib/julia-config.jl  --ldlibs and tell 
me what it returns?

Did you do a make install of Julia itself and are running out of that
installed directory or are you running out of where it compiled or possibly
simply copied the directories? That script assumes the former and I think
maybe you're doing the latter.

If so you can still use it, but you have to specify which julia so 
something like this

/home/kostav/julia/bin/julia  /home/kostav/julia/contrib/julia-config.jl 
 --ldlibs

is there any difference?  To get something working, cut-paste the output to 
the
semi-working step above

to use in a Makefile modify to 

$(shell /home/kostav/julia/bin/julia 
/home/kostav/julia/contrib/julia-config.jl --cflags) 

etc

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Ok, my current Julia version (that I installed via running the source code) 
is: 
*Version 0.4.0-dev+5841 (2015-07-07 14:58 UTC)*So, what should I do 
different so that -I flag gets the proper value?





On Monday, July 13, 2015 at 5:15:04 PM UTC+2, Jeff Waller wrote:
>
>
>
> On Monday, July 13, 2015 at 10:54:57 AM UTC-4, Kostas Tavlaridis-Gyparakis 
> wrote:
>>
>> Any ideas on how to fix the compile error: julia.h: No such file or 
>> directory  #include  compilation terminated.?
>>
>
> Yea of course.  This is a result of the -I flag having the wrong value.  
>
> There was a space of time that this command (julia_config.jl) was not 
> working
> as a result of the new use of  sys.so instead of sys.ji, but that has 
> sense been fixed, so
> that's why I'm asking what version it was.  It would be working in the 
> newest version, but
> I am verifying that now.
>
> The cause of libjulia.so not found is the link step is missing -Wl,-rpath, 
> which julia_config gives you
> that's why I keep coming back to it.
>

Re: [julia-users] Re: Embedding Julia with C++

[Jeff Waller]

On Monday, July 13, 2015 at 10:54:57 AM UTC-4, Kostas Tavlaridis-Gyparakis 
wrote:
>
> Any ideas on how to fix the compile error: julia.h: No such file or 
> directory  #include  compilation terminated.?
>

Yea of course.  This is a result of the -I flag having the wrong value.  

There was a space of time that this command (julia_config.jl) was not 
working
as a result of the new use of  sys.so instead of sys.ji, but that has sense 
been fixed, so
that's why I'm asking what version it was.  It would be working in the 
newest version, but
I am verifying that now.

The cause of libjulia.so not found is the link step is missing -Wl,-rpath, 
which julia_config gives you
that's why I keep coming back to it.

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Any ideas on how to fix the compile error: julia.h: No such file or 
directory  #include  compilation terminated.?


This is the problem, or part of it anyway. That file lives under 
>> `julia/contrib` in a source build.
>>
>
> Hmm  this should be bundled into all 0.4, oh oh.
>

Re: [julia-users] Re: Embedding Julia with C++

[Jeff Waller]

Ok this is turning into kind of a debugging session, but 
/home/kostav/julia/contrib/julia-config.jl --cflags

just run it on the command line.  What's the output?

What version of 0.4?  Is it current as of a few days ago?  In the version 
I'm using
all is well. I will obtain/compile the latest

Re: [julia-users] Re: Embedding Julia with C++

[Jeff Waller]

>
> This is the problem, or part of it anyway. That file lives under 
> `julia/contrib` in a source build.
>

Hmm  this should be bundled into all 0.4, oh oh.

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Thanks a lot, that fixed this error, but now it returns me the same error 
that I get when I just run the compile command
in terminal:

fatal error: julia.h: No such file or directory  #include  
compilation terminated.

On Monday, July 13, 2015 at 4:34:24 PM UTC+2, Jeff Waller wrote:
>
> CFLAGS   += $(shell $/home/kostav/julia/contrib/julia-config.jl --cflags)
>>>
>>
> take out the 2nd $
>
> CFLAGS   += $(shell /home/kostav/julia/contrib/julia-config.jl --cflags) 
>
> what results?
>

Re: [julia-users] Re: Embedding Julia with C++

[Jeff Waller]

>
> CFLAGS   += $(shell $/home/kostav/julia/contrib/julia-config.jl --cflags)
>>
>
take out the 2nd $

CFLAGS   += $(shell /home/kostav/julia/contrib/julia-config.jl --cflags) 

what results?

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Thanks a lot for the answer.
I have located the path of julia-config (/home/kostav/julia/contrib) and I 
did try to run it with setting this path.
Both by just writing the command in the terminal: 

/home/kostav/julia/contrib/julia-config.jl --cflags --ldflags --ldlibs | 
xargs gcc embed_example.c

But I do receive error saying that: fatal error: julia.h: No such file or 
directory  #include 


Or via the makefile, which I change accordingly into this:

CFLAGS   += $(shell $/home/kostav/julia/contrib/julia-config.jl --cflags)
CXXFLAGS += $(shell $/home/kostav/julia/contrib/julia-config.jl --cflags)
LDFLAGS  += $(shell $/home/kostav/julia/contrib/julia-config.jl --ldflags)
LDLIBS   += $(shell $/home/kostav/julia/contrib/julia-config.jl --ldlibs)

all: embed_example

And I receive the following errors: 

make: home/kostav/julia/contrib/julia-config.jl: Command not found
make: home/kostav/julia/contrib/julia-config.jl: Command not found
make: home/kostav/julia/contrib/julia-config.jl: Command not found
cc embed_example.c   -o embed_example
embed_example.c:1:19: fatal error: julia.h: No such file or directory
 #include 
   ^
compilation terminated.
: recipe for target 'embed_example' failed
make: *** [embed_example] Error 1

Let me just remind you that in the case where I use jl_init(NULL);
and I run in terminal this command:

gcc -o test main.c -I /home/kostav/julia/src -I 
/home/kostav/julia/usr/include -I /home/kostav/julia/src/support 
-L/home/kostav/julia/usr/lib -ljulia -lLLVM-3.7svn

Program does compile and the error comes when I try to run the program 
where I receive msg saying that:

error while loading shared libraries: libjulia.so: cannot open shared 
object file: No such file or directory

So, maybe it would be simpler to try to solve this one?
I don't know, again any suggestions would be really welcome!



On Monday, July 13, 2015 at 3:56:23 PM UTC+2, Isaiah wrote:
>
> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command 
>> not found
>
>
> This is the problem, or part of it anyway. That file lives under 
> `julia/contrib` in a source build.
>
> The shell is your friend:
> http://www.cyberciti.biz/faq/search-for-files-in-bash/
>
> On Mon, Jul 13, 2015 at 6:46 AM, Kostas Tavlaridis-Gyparakis <
> kostas.t...@gmail.com > wrote:
>
>> Hello thanks a lot for your answer.
>> You assumed correctly I do use version 0.4.
>> If I got right your proposal about the linking error is to use
>> the command jl_inti(JULIA_INIT_DIR) as shown in this 
>>  
>> example and use a makefile where I just copy paste the
>> commands shown in the example, so the makefile looks like that:
>>
>> JL_SHARE = $(shell julia -e 
>> 'print(joinpath(JULIA_HOME,Base.DATAROOTDIR,"julia"))')
>> CFLAGS   += $(shell $(JL_SHARE)/julia-config.jl --cflags)
>> CXXFLAGS += $(shell $(JL_SHARE)/julia-config.jl --cflags)
>> LDFLAGS  += $(shell $(JL_SHARE)/julia-config.jl --ldflags)
>> LDLIBS   += $(shell $(JL_SHARE)/julia-config.jl --ldlibs)
>>
>> all: main
>>
>>
>> and my source code looks like that:
>>
>> #include 
>>
>> int main(int argc, char *argv[])
>> {
>> /* required: setup the julia context */
>> jl_init(JULIA_INIT_DIR);
>>
>> /* run julia commands */
>> jl_eval_string("print(sqrt(2.0))");
>>
>> /* strongly recommended: notify julia that the
>>  program is about to terminate. this allows
>>  julia time to cleanup pending write requests
>>  and run all finalizers
>> */
>> jl_atexit_hook();
>> return 0;
>> }
>>
>> Yet again when I try to compile I receive the following errors:
>>
>> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command 
>> not found
>> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command 
>> not found
>> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command 
>> not found
>> cc main.c   -o main
>> main.c:1:19: fatal error: julia.h: No such file or directory
>>  #include 
>>^
>> compilation terminated.
>> : recipe for target 'main' failed
>> make: *** [main] Error 1
>>
>>
>> Note that I have really no experience with makefiles so I can not really 
>> handle them
>> properly, but I assumed that I should be working if I did all it was 
>> saying in the example.
>> Yet again I receive the above errors.
>>
>>
>>
>>
>>
>> On Monday, July 13, 2015 at 9:30:33 AM UTC+2, Jeff Waller wrote:
>>
>> It's not clear to me which version you are using?  Depending on the 
>>> version, It is referred
>>> to in the URL you linked...  
>>>
>>> I'll just cut to the chase use 0.4 and julia_config.jl as described in 
>>> the doc, create a
>>> Makefile just cut-and-paste the example, and augment with your source.  
>>> All but
>>> one of your errors is a result of the wrong compile/link flags.
>>>
>>> The last error is that main() is either not being compiled or linked, 
>>> that's just straight-up
>>> C prog

Re: [julia-users] Re: Embedding Julia with C++

[Isaiah Norton]

>
> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command
> not found


This is the problem, or part of it anyway. That file lives under
`julia/contrib` in a source build.

The shell is your friend:
http://www.cyberciti.biz/faq/search-for-files-in-bash/

On Mon, Jul 13, 2015 at 6:46 AM, Kostas Tavlaridis-Gyparakis <
kostas.tavlari...@gmail.com> wrote:

> Hello thanks a lot for your answer.
> You assumed correctly I do use version 0.4.
> If I got right your proposal about the linking error is to use
> the command jl_inti(JULIA_INIT_DIR) as shown in this
> 
> example and use a makefile where I just copy paste the
> commands shown in the example, so the makefile looks like that:
>
> JL_SHARE = $(shell julia -e
> 'print(joinpath(JULIA_HOME,Base.DATAROOTDIR,"julia"))')
> CFLAGS   += $(shell $(JL_SHARE)/julia-config.jl --cflags)
> CXXFLAGS += $(shell $(JL_SHARE)/julia-config.jl --cflags)
> LDFLAGS  += $(shell $(JL_SHARE)/julia-config.jl --ldflags)
> LDLIBS   += $(shell $(JL_SHARE)/julia-config.jl --ldlibs)
>
> all: main
>
>
> and my source code looks like that:
>
> #include 
>
> int main(int argc, char *argv[])
> {
> /* required: setup the julia context */
> jl_init(JULIA_INIT_DIR);
>
> /* run julia commands */
> jl_eval_string("print(sqrt(2.0))");
>
> /* strongly recommended: notify julia that the
>  program is about to terminate. this allows
>  julia time to cleanup pending write requests
>  and run all finalizers
> */
> jl_atexit_hook();
> return 0;
> }
>
> Yet again when I try to compile I receive the following errors:
>
> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command
> not found
> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command
> not found
> make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command
> not found
> cc main.c   -o main
> main.c:1:19: fatal error: julia.h: No such file or directory
>  #include 
>^
> compilation terminated.
> : recipe for target 'main' failed
> make: *** [main] Error 1
>
>
> Note that I have really no experience with makefiles so I can not really
> handle them
> properly, but I assumed that I should be working if I did all it was
> saying in the example.
> Yet again I receive the above errors.
>
>
>
>
>
> On Monday, July 13, 2015 at 9:30:33 AM UTC+2, Jeff Waller wrote:
>
> It's not clear to me which version you are using?  Depending on the
>> version, It is referred
>> to in the URL you linked...
>>
>> I'll just cut to the chase use 0.4 and julia_config.jl as described in
>> the doc, create a
>> Makefile just cut-and-paste the example, and augment with your source.
>> All but
>> one of your errors is a result of the wrong compile/link flags.
>>
>> The last error is that main() is either not being compiled or linked,
>> that's just straight-up
>> C programming, and has nothing to do with Julia.
>>
>> As far as eclipse goes, I'm confident it's possible, I can't imagine
>> eclipse not supporting
>> compilation using Makefiles, but even if it doesn't you can still
>> automate things, but just
>> get something working first and you can embellish later.
>>
>> TL;DR
>>
>> 0.4,  julia_config, cut-paste Makefile, add your source, done
>>
>

[julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Hello thanks a lot for your answer.
You assumed correctly I do use version 0.4.
If I got right your proposal about the linking error is to use
the command jl_inti(JULIA_INIT_DIR) as shown in this 
 
example and use a makefile where I just copy paste the
commands shown in the example, so the makefile looks like that:

JL_SHARE = $(shell julia -e 
'print(joinpath(JULIA_HOME,Base.DATAROOTDIR,"julia"))')
CFLAGS   += $(shell $(JL_SHARE)/julia-config.jl --cflags)
CXXFLAGS += $(shell $(JL_SHARE)/julia-config.jl --cflags)
LDFLAGS  += $(shell $(JL_SHARE)/julia-config.jl --ldflags)
LDLIBS   += $(shell $(JL_SHARE)/julia-config.jl --ldlibs)

all: main


and my source code looks like that:

#include 

int main(int argc, char *argv[])
{
/* required: setup the julia context */
jl_init(JULIA_INIT_DIR);

/* run julia commands */
jl_eval_string("print(sqrt(2.0))");

/* strongly recommended: notify julia that the
 program is about to terminate. this allows
 julia time to cleanup pending write requests
 and run all finalizers
*/
jl_atexit_hook();
return 0;
}

Yet again when I try to compile I receive the following errors:

make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command 
not found
make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command 
not found
make: /home/kostav/julia/usr/bin/../share/julia/julia-config.jl: Command 
not found
cc main.c   -o main
main.c:1:19: fatal error: julia.h: No such file or directory
 #include 
   ^
compilation terminated.
: recipe for target 'main' failed
make: *** [main] Error 1


Note that I have really no experience with makefiles so I can not really 
handle them
properly, but I assumed that I should be working if I did all it was saying 
in the example.
Yet again I receive the above errors.





On Monday, July 13, 2015 at 9:30:33 AM UTC+2, Jeff Waller wrote:

It's not clear to me which version you are using?  Depending on the 
> version, It is referred
> to in the URL you linked...  
>
> I'll just cut to the chase use 0.4 and julia_config.jl as described in the 
> doc, create a
> Makefile just cut-and-paste the example, and augment with your source. 
>  All but
> one of your errors is a result of the wrong compile/link flags.
>
> The last error is that main() is either not being compiled or linked, 
> that's just straight-up
> C programming, and has nothing to do with Julia.
>
> As far as eclipse goes, I'm confident it's possible, I can't imagine 
> eclipse not supporting
> compilation using Makefiles, but even if it doesn't you can still automate 
> things, but just
> get something working first and you can embellish later.
>
> TL;DR
>
> 0.4,  julia_config, cut-paste Makefile, add your source, done
>

[julia-users] Re: Embedding Julia with C++

[Jeff Waller]

It's not clear to me which version you are using?  Depending on the 
version, It is referred
to in the URL you linked...  

I'll just cut to the chase use 0.4 and julia_config.jl as described in the 
doc, create a
Makefile just cut-and-paste the example, and augment with your source.  All 
but
one of your errors is a result of the wrong compile/link flags.

The last error is that main() is either not being compiled or linked, 
that's just straight-up
C programming, and has nothing to do with Julia.

As far as eclipse goes, I'm confident it's possible, I can't imagine 
eclipse not supporting
compilation using Makefiles, but even if it doesn't you can still automate 
things, but just
get something working first and you can embellish later.

TL;DR

0.4,  julia_config, cut-paste Makefile, add your source, done

[julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Hello again,
I am writing to this post, as I face some more problems with trying to link 
Julia functions with C++ code.
The thing is that I changed my current Julia version, I installed Julia 
running the source code as I wanted 
to install the Cxx package as well.
So, I just went to run the first smallest example with some c code and c++ 
code that uses a julia function
as presented here , 
so I only try to run the following file:

#include 
int main(int argc, char *argv[]){
/* required: setup the julia context */
jl_init(NULL);

/* run julia commands */
jl_eval_string("print(sqrt(2.0))");

/* strongly recommended: notify julia that the program is about to 
terminate. this allows julia time to cleanup pending write requests 
and run all finalizers*/
jl_atexit_hook();
return 0;}



The first thing that was different was that when I was including just the 
path of julia.h and libjulia.so and I
run the command like this:

gcc -o test main.c -I /home/kostav/julia/src -L/home/kostav/julia/usr/lib 
-ljulia

I receive an error saying: 

*In file included from main.c:1:0: /home/kostav/julia/src/julia.h:12:24: 
fatal error: libsupport.h: No such file or directory  #include 
"libsupport.h" compilation terminated.*

Then when I add the path of libsupport.h I receive a similar error msg 
saying that uv.h is missing so I have 
to add its path as well, and as a result I finally run the following 
command:

gcc -o test main.c -I /home/kostav/julia/src -I 
/home/kostav/julia/usr/include -I /home/kostav/julia/src/support 
-L/home/kostav/julia/usr/lib -ljulia

In that case I receive various errors about undefined references regarding 
llvm functions and as a result I include
as well the equivelant library and finally run the following command:

gcc -o test main.c -I /home/kostav/julia/src -I 
/home/kostav/julia/usr/include -I /home/kostav/julia/src/support 
-L/home/kostav/julia/usr/lib -ljulia -lLLVM-3.7svn

On this case the program does compile but when I try to run it, I receive 
the following error:




*error while loading shared libraries: libjulia.so: cannot open shared 
object file: No such file or directory*The exact same implies for the 
equivalent program in c++. Note that when I try to call a julia function 
inside a c++ more complicated 
structure (namely in a class) I receive a different error. More 
specifically just for the very simple class that exists
in this Cxx example 
 
for just using the same simple julia function inside the class that leads 
to the following slighltly different cpp file

#include "ArrayMaker.h"
#include 

using namespace std;

ArrayMaker::ArrayMaker(int iNum, float fNum) {

jl_init(NULL);
jl_eval_string("print(sqrt(2.0))");

cout << "Got arguments: " << iNum << ", and " << fNum << endl;
iNumber = iNum;
fNumber = fNum;
fArr = new float[iNumber];
jl_atexit_hook();
}

float* ArrayMaker::fillArr() {
cout << "Filling the array" << endl;
for (int i=0; i < iNumber; i++) {
fArr[i] = fNumber;
fNumber *= 2;
} 
return fArr;
}

With the header file being almost the same:

#ifndef ARRAYMAKER_H
#define ARRAYMAKER_H

#include 

class ArrayMaker
{
private:
int iNumber;
float fNumber;
float* fArr;
public:
ArrayMaker(int, float);
float* fillArr();
};

#endif

When I try to compile in terminal using the following command:

g++ -o test ArrayMaker.cpp -I /home/kostav/julia/src -I 
/home/kostav/julia/usr/include -I /home/kostav/julia/src/support 
-L/home/kostav/julia/usr/lib -ljulia -lLLVM-3.7svn

I do receive the following error: 

/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crt1.o: In 
function `_start': 
/build/buildd/glibc-2.21/csu/../sysdeps/x86_64/start.S:114: undefined 
reference to `main'
collect2: error: ld returned 1 exit status



I am really not sure how to resolve any of the two errors and in general 
the second one is also pretty important to me, as in general my end goal
is starting from a julia file to use my self-written c++ code, where inside 
the c++ code I call some other self-written julia functions, I know it does
sound kind twisted, but that's what I am interested to do, as I am trying 
to tackle a big Mathematical Problem by builing the original problem in Jump
then decompose it and use a solver that is written in c++ (that's why I 
need to call c++ inside julia) which then needs again to send back 
information
to the original model and probably solve some subproblems with CPLEX 
(that's why I will need inside the c++ code to call julia functions again). 
That
with as much as few words as possible in order not to bother you with a lot 
of unnecessary information.

[julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

So, finally issue was solved by this answer here 

.

On Thursday, June 25, 2015 at 3:33:45 PM UTC+2, Kostas Tavlaridis-Gyparakis 
wrote:
>
> But, sys.ji does exist in my folder of the path "
> /home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/"
>
> On Thursday, June 25, 2015 at 3:18:17 PM UTC+2, Scott Jones wrote:
>>
>>  There is no .ji file anymore, although there is a command line option to 
>> produce it, 
>> --output-ji 
>>
>>
>> On Monday, June 22, 2015 at 9:03:31 AM UTC-4, Kostas Tavlaridis-Gyparakis 
>> wrote:
>>>
>>> Hello,
>>> I am trying to embed Julia in C++ but I currently face some sort of 
>>> issues.
>>> I am trying to follow the instructions shown here 
>>> .
>>> First things first, I run Ubuntu 15.04 and my Julia version is v. 0.3.2 
>>> (it's the 
>>> version that is automatic installed when installing julia from ubuntu 
>>> center).
>>> I use eclipse for my C++ projects, yet again I have the following 
>>> issues, ac-
>>> cording to the instructions before trying to write any julia code in C 
>>> or C++ you
>>> need first to:
>>> 1) link the julia library (assuming I undersand correctly this refers 
>>> to  libjulia.so),
>>> which should be located in "Julia_DIR/usr/lib", yet again in my julia 
>>> directory
>>> there is no folder under the name usr. I did though find a libjulia.so 
>>> file in an
>>> other directory of my pc ("/usr/lib/x86_64-linux-gnu/julia") and added 
>>> this one
>>> instead.
>>> 2) include the path of julia.h which should be located in 
>>> "Julia_DIR/inclue/julia"
>>> now again in my julia directory there are no such folders and in general 
>>> there
>>> is nowhere in my pc any file such as julia.h. I did sth that is probably 
>>> wrong 
>>> and stupid but couldn't come up with anything else I downloaded this 
>>>  and I
>>> included the location of where julia.h is located to eclipse as well 
>>> with the direc-
>>> tions of all the other header files that were inculuded inside julia.h.
>>>
>>> Now when in Eclipse I am trying to compile and run a few simple julia 
>>> commands
>>> having included julia.h i receive an error saying that there is no uv.h 
>>> file in my
>>> system which is needed in one of the julia header files.
>>> I know that my whole approach is wrong, but yet again I couldn't find 
>>> anywhere
>>> in my pc the proper folders or files in order to follow the steps that 
>>> were sugges-
>>> ted in the julia website for running julia code inside C++.
>>> Any help would be much appreciated.
>>>
>>> Also, one more thing I wanted to ask is the following, in general 
>>> writing Julia
>>> code inside a C++ code is limited?
>>> What I want to do in general is write a JuMP model inside C++, so in 
>>> general
>>> is this possible, in the sense that by embedding Julia inside C++, will 
>>> I be able
>>> to use all of the tools and code of Julia language or is this only 
>>> limited to a cer-
>>> tain amount of commands and packages?
>>>
>>

[julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

But, sys.ji does exist in my folder of the path "
/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/"

On Thursday, June 25, 2015 at 3:18:17 PM UTC+2, Scott Jones wrote:
>
>  There is no .ji file anymore, although there is a command line option to 
> produce it, 
> --output-ji 
>
>
> On Monday, June 22, 2015 at 9:03:31 AM UTC-4, Kostas Tavlaridis-Gyparakis 
> wrote:
>>
>> Hello,
>> I am trying to embed Julia in C++ but I currently face some sort of 
>> issues.
>> I am trying to follow the instructions shown here 
>> .
>> First things first, I run Ubuntu 15.04 and my Julia version is v. 0.3.2 
>> (it's the 
>> version that is automatic installed when installing julia from ubuntu 
>> center).
>> I use eclipse for my C++ projects, yet again I have the following issues, 
>> ac-
>> cording to the instructions before trying to write any julia code in C or 
>> C++ you
>> need first to:
>> 1) link the julia library (assuming I undersand correctly this refers to  
>> libjulia.so),
>> which should be located in "Julia_DIR/usr/lib", yet again in my julia 
>> directory
>> there is no folder under the name usr. I did though find a libjulia.so 
>> file in an
>> other directory of my pc ("/usr/lib/x86_64-linux-gnu/julia") and added 
>> this one
>> instead.
>> 2) include the path of julia.h which should be located in 
>> "Julia_DIR/inclue/julia"
>> now again in my julia directory there are no such folders and in general 
>> there
>> is nowhere in my pc any file such as julia.h. I did sth that is probably 
>> wrong 
>> and stupid but couldn't come up with anything else I downloaded this 
>>  and I
>> included the location of where julia.h is located to eclipse as well with 
>> the direc-
>> tions of all the other header files that were inculuded inside julia.h.
>>
>> Now when in Eclipse I am trying to compile and run a few simple julia 
>> commands
>> having included julia.h i receive an error saying that there is no uv.h 
>> file in my
>> system which is needed in one of the julia header files.
>> I know that my whole approach is wrong, but yet again I couldn't find 
>> anywhere
>> in my pc the proper folders or files in order to follow the steps that 
>> were sugges-
>> ted in the julia website for running julia code inside C++.
>> Any help would be much appreciated.
>>
>> Also, one more thing I wanted to ask is the following, in general writing 
>> Julia
>> code inside a C++ code is limited?
>> What I want to do in general is write a JuMP model inside C++, so in 
>> general
>> is this possible, in the sense that by embedding Julia inside C++, will I 
>> be able
>> to use all of the tools and code of Julia language or is this only 
>> limited to a cer-
>> tain amount of commands and packages?
>>
>

[julia-users] Re: Embedding Julia with C++

[Scott Jones]

 There is no .ji file anymore, although there is a command line option to 
produce it, 
--output-ji 


On Monday, June 22, 2015 at 9:03:31 AM UTC-4, Kostas Tavlaridis-Gyparakis 
wrote:
>
> Hello,
> I am trying to embed Julia in C++ but I currently face some sort of issues.
> I am trying to follow the instructions shown here 
> .
> First things first, I run Ubuntu 15.04 and my Julia version is v. 0.3.2 
> (it's the 
> version that is automatic installed when installing julia from ubuntu 
> center).
> I use eclipse for my C++ projects, yet again I have the following issues, 
> ac-
> cording to the instructions before trying to write any julia code in C or 
> C++ you
> need first to:
> 1) link the julia library (assuming I undersand correctly this refers to  
> libjulia.so),
> which should be located in "Julia_DIR/usr/lib", yet again in my julia 
> directory
> there is no folder under the name usr. I did though find a libjulia.so 
> file in an
> other directory of my pc ("/usr/lib/x86_64-linux-gnu/julia") and added 
> this one
> instead.
> 2) include the path of julia.h which should be located in 
> "Julia_DIR/inclue/julia"
> now again in my julia directory there are no such folders and in general 
> there
> is nowhere in my pc any file such as julia.h. I did sth that is probably 
> wrong 
> and stupid but couldn't come up with anything else I downloaded this 
>  and I
> included the location of where julia.h is located to eclipse as well with 
> the direc-
> tions of all the other header files that were inculuded inside julia.h.
>
> Now when in Eclipse I am trying to compile and run a few simple julia 
> commands
> having included julia.h i receive an error saying that there is no uv.h 
> file in my
> system which is needed in one of the julia header files.
> I know that my whole approach is wrong, but yet again I couldn't find 
> anywhere
> in my pc the proper folders or files in order to follow the steps that 
> were sugges-
> ted in the julia website for running julia code inside C++.
> Any help would be much appreciated.
>
> Also, one more thing I wanted to ask is the following, in general writing 
> Julia
> code inside a C++ code is limited?
> What I want to do in general is write a JuMP model inside C++, so in 
> general
> is this possible, in the sense that by embedding Julia inside C++, will I 
> be able
> to use all of the tools and code of Julia language or is this only limited 
> to a cer-
> tain amount of commands and packages?
>

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

Didn't manage to make the code run. I am really wondering what I am missing 
here...

On Wednesday, June 24, 2015 at 3:59:47 PM UTC+2, Isaiah wrote:
>
> I guess this is still a distro path issue. The following suggestion is not 
> very general, but to at least get going, you could try:
>
> jl_init("/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/
> julia/")
>
> On Wed, Jun 24, 2015 at 9:38 AM, Kostas Tavlaridis-Gyparakis <
> kostas.t...@gmail.com > wrote:
>
>> I am simply trying to run the first example attached in the embedding 
>> documantation which is the following block of code:
>>
>> #include 
>> #include 
>> using namespace std;
>>
>> int main() {
>>   /* required: setup the julia context */
>> jl_init(NULL);
>>
>> /* run julia commands */
>> jl_eval_string("print(sqrt(2.0))");
>>
>> /* strongly recommended: notify julia that the
>>  program is about to terminate. this allows
>>  julia time to cleanup pending write requests
>>  and run all finalizers
>> */
>> jl_atexit_hook();
>>
>> return 0;
>> }
>>
>> And when I try to run the program in eclipse (after having linked the 
>> library and defined the path of the header file) the above mentioned
>> error message appeas which says:
>>
>> - System image file 
>> "/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji" 
>> not found 
>>
>> On Wednesday, June 24, 2015 at 3:31:50 PM UTC+2, Isaiah wrote:
>>>
>>> You probably need to call `jl_init(NULL)` at the beginning of the 
>>> program. If you have not done so yet, I would suggest to read the embedding 
>>> documentation:
>>>
>>> http://docs.julialang.org/en/release-0.3/manual/embedding/
>>>
>>> and start with the embedding example in the source:
>>>
>>> https://github.com/JuliaLang/julia/blob/master/examples/embedding.c
>>>
>>>
>>>
>>>
>>> On Wed, Jun 24, 2015 at 9:05 AM, Kostas Tavlaridis-Gyparakis <
>>> kostas.t...@gmail.com> wrote:
>>>
 I did download the 0.4 nightbuilt which includes the above mentioned 
 files in the proper location, but now Eclipse is throwing me a different
 error I can not sort out how to overcome. When I try to run a small cpp 
 file with a few julia comands Eclipse is compiling the file but when I
 try to run it it throws me the following message:

 "System image file 
 "/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji" 
 not found "

 Futhermore since I am really new to Julia I am not sure and I don't 
 know a lot of the existing tools, is it possible to write a function in 
 julia
 that takes as an argument some data creates a model and solves it and 
 call this function from inside my c++ project?
 I am asking this as in the example in the link 
 
  
 attached by Isaiah with the qsort, the whole process is done inside julia 
 framework.
 Whereas in my case I would be interested to write a julia program, like 
 the one described above that I would be able to call as a function 
 (I want it to solve a subproblem actually) inside my c++ project in 
 eclipse.
 Is this relatively easy to be done?
 Because I think this would be the best approach for my case.

 On Tuesday, June 23, 2015 at 8:20:56 AM UTC+2, Jeff Waller wrote:
>
> Embedded Julia is of particular interest to me. To answer your 
> question, everything in Julia is available via embedded Julia.
>
> I would very much discourage use of version 0.3.2; avoid it if you 
> can.  I think that particular version has the uv.h problem which is fixed 
> in later versions. Can you gain root on this host?  If so you can get 
> 0.3.9 
> via PPA.  Or even better if you can get ahold of one of the nightly 
> builds, 
> then 0.4.x comes with julia_config.jl, which figures out all of the right 
> compile flags automatically.  You just have to cut and paste in a 
> Makefile.  But if no makefile, you can run it and know the necessary 
> compile time flags.
>
>
>>>
>

Re: [julia-users] Re: Embedding Julia with C++

[Isaiah Norton]

I guess this is still a distro path issue. The following suggestion is not
very general, but to at least get going, you could try:

jl_init("/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/")

On Wed, Jun 24, 2015 at 9:38 AM, Kostas Tavlaridis-Gyparakis <
kostas.tavlari...@gmail.com> wrote:

> I am simply trying to run the first example attached in the embedding
> documantation which is the following block of code:
>
> #include 
> #include 
> using namespace std;
>
> int main() {
>   /* required: setup the julia context */
> jl_init(NULL);
>
> /* run julia commands */
> jl_eval_string("print(sqrt(2.0))");
>
> /* strongly recommended: notify julia that the
>  program is about to terminate. this allows
>  julia time to cleanup pending write requests
>  and run all finalizers
> */
> jl_atexit_hook();
>
> return 0;
> }
>
> And when I try to run the program in eclipse (after having linked the
> library and defined the path of the header file) the above mentioned
> error message appeas which says:
>
> - System image file
> "/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji"
> not found
>
> On Wednesday, June 24, 2015 at 3:31:50 PM UTC+2, Isaiah wrote:
>>
>> You probably need to call `jl_init(NULL)` at the beginning of the
>> program. If you have not done so yet, I would suggest to read the embedding
>> documentation:
>>
>> http://docs.julialang.org/en/release-0.3/manual/embedding/
>>
>> and start with the embedding example in the source:
>>
>> https://github.com/JuliaLang/julia/blob/master/examples/embedding.c
>>
>>
>>
>>
>> On Wed, Jun 24, 2015 at 9:05 AM, Kostas Tavlaridis-Gyparakis <
>> kostas.t...@gmail.com> wrote:
>>
>>> I did download the 0.4 nightbuilt which includes the above mentioned
>>> files in the proper location, but now Eclipse is throwing me a different
>>> error I can not sort out how to overcome. When I try to run a small cpp
>>> file with a few julia comands Eclipse is compiling the file but when I
>>> try to run it it throws me the following message:
>>>
>>> "System image file
>>> "/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji"
>>> not found "
>>>
>>> Futhermore since I am really new to Julia I am not sure and I don't know
>>> a lot of the existing tools, is it possible to write a function in julia
>>> that takes as an argument some data creates a model and solves it and
>>> call this function from inside my c++ project?
>>> I am asking this as in the example in the link
>>> 
>>> attached by Isaiah with the qsort, the whole process is done inside julia
>>> framework.
>>> Whereas in my case I would be interested to write a julia program, like
>>> the one described above that I would be able to call as a function
>>> (I want it to solve a subproblem actually) inside my c++ project in
>>> eclipse.
>>> Is this relatively easy to be done?
>>> Because I think this would be the best approach for my case.
>>>
>>> On Tuesday, June 23, 2015 at 8:20:56 AM UTC+2, Jeff Waller wrote:

 Embedded Julia is of particular interest to me. To answer your
 question, everything in Julia is available via embedded Julia.

 I would very much discourage use of version 0.3.2; avoid it if you
 can.  I think that particular version has the uv.h problem which is fixed
 in later versions. Can you gain root on this host?  If so you can get 0.3.9
 via PPA.  Or even better if you can get ahold of one of the nightly builds,
 then 0.4.x comes with julia_config.jl, which figures out all of the right
 compile flags automatically.  You just have to cut and paste in a
 Makefile.  But if no makefile, you can run it and know the necessary
 compile time flags.


>>

Re: [julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

I am simply trying to run the first example attached in the embedding 
documantation which is the following block of code:

#include 
#include 
using namespace std;

int main() {
  /* required: setup the julia context */
jl_init(NULL);

/* run julia commands */
jl_eval_string("print(sqrt(2.0))");

/* strongly recommended: notify julia that the
 program is about to terminate. this allows
 julia time to cleanup pending write requests
 and run all finalizers
*/
jl_atexit_hook();

return 0;
}

And when I try to run the program in eclipse (after having linked the 
library and defined the path of the header file) the above mentioned
error message appeas which says:

- System image file 
"/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji" 
not found 

On Wednesday, June 24, 2015 at 3:31:50 PM UTC+2, Isaiah wrote:
>
> You probably need to call `jl_init(NULL)` at the beginning of the program. 
> If you have not done so yet, I would suggest to read the embedding 
> documentation:
>
> http://docs.julialang.org/en/release-0.3/manual/embedding/
>
> and start with the embedding example in the source:
>
> https://github.com/JuliaLang/julia/blob/master/examples/embedding.c
>
>
>
>
> On Wed, Jun 24, 2015 at 9:05 AM, Kostas Tavlaridis-Gyparakis <
> kostas.t...@gmail.com > wrote:
>
>> I did download the 0.4 nightbuilt which includes the above mentioned 
>> files in the proper location, but now Eclipse is throwing me a different
>> error I can not sort out how to overcome. When I try to run a small cpp 
>> file with a few julia comands Eclipse is compiling the file but when I
>> try to run it it throws me the following message:
>>
>> "System image file 
>> "/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji" 
>> not found "
>>
>> Futhermore since I am really new to Julia I am not sure and I don't know 
>> a lot of the existing tools, is it possible to write a function in julia
>> that takes as an argument some data creates a model and solves it and 
>> call this function from inside my c++ project?
>> I am asking this as in the example in the link 
>> 
>>  
>> attached by Isaiah with the qsort, the whole process is done inside julia 
>> framework.
>> Whereas in my case I would be interested to write a julia program, like 
>> the one described above that I would be able to call as a function 
>> (I want it to solve a subproblem actually) inside my c++ project in 
>> eclipse.
>> Is this relatively easy to be done?
>> Because I think this would be the best approach for my case.
>>
>> On Tuesday, June 23, 2015 at 8:20:56 AM UTC+2, Jeff Waller wrote:
>>>
>>> Embedded Julia is of particular interest to me. To answer your question, 
>>> everything in Julia is available via embedded Julia.
>>>
>>> I would very much discourage use of version 0.3.2; avoid it if you can.  
>>> I think that particular version has the uv.h problem which is fixed in 
>>> later versions. Can you gain root on this host?  If so you can get 0.3.9 
>>> via PPA.  Or even better if you can get ahold of one of the nightly builds, 
>>> then 0.4.x comes with julia_config.jl, which figures out all of the right 
>>> compile flags automatically.  You just have to cut and paste in a 
>>> Makefile.  But if no makefile, you can run it and know the necessary 
>>> compile time flags.
>>>
>>>
>

Re: [julia-users] Re: Embedding Julia with C++

[Isaiah Norton]

You probably need to call `jl_init(NULL)` at the beginning of the program.
If you have not done so yet, I would suggest to read the embedding
documentation:

http://docs.julialang.org/en/release-0.3/manual/embedding/

and start with the embedding example in the source:

https://github.com/JuliaLang/julia/blob/master/examples/embedding.c




On Wed, Jun 24, 2015 at 9:05 AM, Kostas Tavlaridis-Gyparakis <
kostas.tavlari...@gmail.com> wrote:

> I did download the 0.4 nightbuilt which includes the above mentioned files
> in the proper location, but now Eclipse is throwing me a different
> error I can not sort out how to overcome. When I try to run a small cpp
> file with a few julia comands Eclipse is compiling the file but when I
> try to run it it throws me the following message:
>
> "System image file
> "/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji"
> not found "
>
> Futhermore since I am really new to Julia I am not sure and I don't know a
> lot of the existing tools, is it possible to write a function in julia
> that takes as an argument some data creates a model and solves it and call
> this function from inside my c++ project?
> I am asking this as in the example in the link
> 
> attached by Isaiah with the qsort, the whole process is done inside julia
> framework.
> Whereas in my case I would be interested to write a julia program, like
> the one described above that I would be able to call as a function
> (I want it to solve a subproblem actually) inside my c++ project in
> eclipse.
> Is this relatively easy to be done?
> Because I think this would be the best approach for my case.
>
> On Tuesday, June 23, 2015 at 8:20:56 AM UTC+2, Jeff Waller wrote:
>>
>> Embedded Julia is of particular interest to me. To answer your question,
>> everything in Julia is available via embedded Julia.
>>
>> I would very much discourage use of version 0.3.2; avoid it if you can.
>> I think that particular version has the uv.h problem which is fixed in
>> later versions. Can you gain root on this host?  If so you can get 0.3.9
>> via PPA.  Or even better if you can get ahold of one of the nightly builds,
>> then 0.4.x comes with julia_config.jl, which figures out all of the right
>> compile flags automatically.  You just have to cut and paste in a
>> Makefile.  But if no makefile, you can run it and know the necessary
>> compile time flags.
>>
>>

[julia-users] Re: Embedding Julia with C++

[Kostas Tavlaridis-Gyparakis]

I did download the 0.4 nightbuilt which includes the above mentioned files 
in the proper location, but now Eclipse is throwing me a different
error I can not sort out how to overcome. When I try to run a small cpp 
file with a few julia comands Eclipse is compiling the file but when I
try to run it it throws me the following message:

"System image file 
"/home/kostas/workspace/juli/Debug/../lib/x86_64-linux-gnu/julia/sys.ji" 
not found "

Futhermore since I am really new to Julia I am not sure and I don't know a 
lot of the existing tools, is it possible to write a function in julia
that takes as an argument some data creates a model and solves it and call 
this function from inside my c++ project?
I am asking this as in the example in the link 

 
attached by Isaiah with the qsort, the whole process is done inside julia 
framework.
Whereas in my case I would be interested to write a julia program, like the 
one described above that I would be able to call as a function 
(I want it to solve a subproblem actually) inside my c++ project in eclipse.
Is this relatively easy to be done?
Because I think this would be the best approach for my case.

On Tuesday, June 23, 2015 at 8:20:56 AM UTC+2, Jeff Waller wrote:
>
> Embedded Julia is of particular interest to me. To answer your question, 
> everything in Julia is available via embedded Julia.
>
> I would very much discourage use of version 0.3.2; avoid it if you can.  I 
> think that particular version has the uv.h problem which is fixed in later 
> versions. Can you gain root on this host?  If so you can get 0.3.9 via PPA. 
>  Or even better if you can get ahold of one of the nightly builds, then 
> 0.4.x comes with julia_config.jl, which figures out all of the right 
> compile flags automatically.  You just have to cut and paste in a Makefile. 
>  But if no makefile, you can run it and know the necessary compile time 
> flags.
>
>

[julia-users] Re: Embedding Julia with C++

[Jeff Waller]

Embedded Julia is of particular interest to me. To answer your question, 
everything in Julia is available via embedded Julia.

I would very much discourage use of version 0.3.2; avoid it if you can.  I 
think that particular version has the uv.h problem which is fixed in later 
versions. Can you gain root on this host?  If so you can get 0.3.9 via PPA. 
 Or even better if you can get ahold of one of the nightly builds, then 
0.4.x comes with julia_config.jl, which figures out all of the right 
compile flags automatically.  You just have to cut and paste in a Makefile. 
 But if no makefile, you can run it and know the necessary compile time 
flags.