Should I use a shared library?

Hi,
This is the setup. I am working in two different applications, one to be compiled for desktop use (AIR) and one to be compiled for the web. They are part of the same project and use the same visual components, but they are completely different apps. When a visual component is changed in one application then it should also change in the other one.
Is this a good situation to use a shared library fla?
I am new to the concept of shared libraries and I am considering the options.
On one had I would not have to update 2 applications everytime I change something, on the other, I would always have to recompile the library folder when I do the smallest changes to a component.
Could you give me your opinion in this?
Regards,
Ana G. Pino

Thanks for answering.
I have been trying to look for the best set up and I am not a fan of RSLs either. Do you have a recommendation of another way that I could set this up? Could you tell me your reasons for not liking RSL? And if you have worked with them any advice on how to approach them?
I know... too many questions, but I am really lost.
Thanks in advance.
Regards,
Ana

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How can I use a shared library made with the application builder?

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I am using LabVIEW 7.1 running on Slackware 10.1 (kernel 2.4.29) and I am trying to call a graph display from a C program that I use for debugging VME access from a VMIVME controler. So using the application builder I built the VI as a shared library (graph.vi -> graph.so) containing a function called "graph". In my main program the call to the dlopen fails with the error: "graph.so: undefined symbol: UninitLVClient". When I examin graph.so with nm I see that UninitLVClient and other LabVIEW functions are indeed undefined and using ldd shows that graph.so has dependencies only on libc.so.* and *linux*.so.* but not on LabVIEW related stuff. Those functions are defined in the liblv.so that's in the cintools directory but I have no idea if the user is supposed to use that.
So I think I am missing an important concept here. Can somebody help or direct me to some documentation (I found lots of information about how to link external code to LabVIEW but nothing about how to link LabVIEW code to an external program)?

Thanks Watermann,
your message has been very useful so now I am linking to the proper library but I still have problems when trying to load dynamically the shared library produced with LabVIEW. It is strange that I could successfully load the lvrt library at loading time but it does not work when I am loading the library at execution time.
I made a small LabVIEW program that prints a hello window and I am calling it from a C program. In the first program main.c I am linking to the lvrt library at loading time and it works but in the second one I am linking dynamically at execution time and it does not work. For my work I need to be able to load code done in LabVIEW at execution time. Any help is appreciated!
Program main.c:
// small program to call a LabVIEW shared library
#include
#include
#include "hello.h" // got this from the LabVIEW builder, i.e. when I made the hello.so
int main(void)
printf("Hello from C!\nLets call LabVIEW now\n");
hello();
printf("Bye ... \n");
return 0;
The command to compile main.c, i.e. linking shared library lvrt when loading main program:
gcc -Wall -I /usr/local/lv71/cintools/ -o main main.c hello.so -l lvrt
The LD_LIBRARY_PATH has been defined and exported:
$ LD_LIBRARY_PATH=$PWD
$ export LD_LIBRARY_PATH
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// small program to call a LabVIEW shared library
#include
#include
#include
int main(void)
void * h_lvrt;
void * h_hello;
void (* hello)(void);
char * error;
printf("Hello from C!\nLets call LabVIEW now\n");
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// check for error
error = dlerror();
if (error) {
printf("error : could not open LabVIEW RunTime library\n");
printf("%s\n", error);
return 1;
// open hello shared library
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h_hello = dlopen("hello.so", RTLD_NOW);
// check for error
error = dlerror();
if (error) {
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printf("%s\n", error);
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hello = dlsym(h_hello, "hello");
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error = dlerror();
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// close LabVIEW RunTime shared library
dlclose(h_lvrt);
printf("error : could not get the hello function\n");
printf("%s\n", error);
return 1;
// call hello function
hello();
// close hello shared library
dlclose(h_hello);
// close LabVIEW RunTime shared library
dlclose(h_lvrt);
printf("Bye ... \n");
return 0;
The command to compile main2.c, i.e. dynamically linking library lvrt at execution of main2 program:
gcc -Wall -o main2 main2.c -l dl
The LD_LIBRARY_PATH still defined and exported.
IT DOES NOT WORK!
Program output:
Hello from C!
Lets call LabVIEW now
error : could not open hello library
/home/darss/lv_call/hello.so: undefined symbol: WaitLVDLLReady

How to use J2EE shared library in a team environment? Any help?

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Hello jmcole1,
Welcome to the Apple Support Communities!
I understand that some of your TV Shows are not showing on your iOS devices after updating to the latest iOS version. I also understand that you have performed some great troubleshooting steps already. In this situation, just to make sure all suggested troubleshooting steps for this situation have been completed, I would suggest working through the information in the attached article.
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Segfault when using shared library

Hi,
I have a little problem. I'm using a shared library in my program. It works fine under windows, but when I run my program under linux or solaris I get a segfault.
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This is Java related ?
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If I understand correctly, you have two computers. One of them has an external hard drive connected to it and you want to know how to make that available to another computer, correct?
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b. Under the TCP/IP setting, select "Using DHCP"
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tt2

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- Partha
LabVIEW - Wires that catch bugs!

Here you can find Application Notes and examples:
http://zone.ni.com/devzone/devzone.nsf/webcategories/98D192CDCCDA21EE86256AB7006BECAF
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Coherence Extend shared library is quite large

Hello all,
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Edited by: 952088 on Aug 10, 2012 8:39 AM - specified language

Hi Anthony,
You may want to measure the time it takes to load the Coherence library versus the size of the .so. It's not likely that the entire shared library will need to be loaded into memory. Only the parts that are needed for whatever your program is doing. And on most OS's, when multiple processes are using the same shared library, just one copy of the shared library will be loaded into memory and then will be shared by all of the processes.
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Welcome to the Apple Community Katie.
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Drag it to the computer’s internal drive and then to the library in the open iTunes application window.
(114990)

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