Error while loading shared libraries

Applications Programming
1

I am trying to run a C++ program which uses a static library libprun.a . During compilation, I am loading this library file using a environment variable as below.

LIBDIR =  ${CUSTOM_PATH}/lib

LOADLIBS = $(LIBDIR)/libgqlcomm.a \
	           $(LIBDIR)/libgsml.a \
                   $(LIBDIR)/libprun.a \
                   $(LIBDIR)/libglis.a

I am not getting any errors during compilation or during running the binary in the same environment in which I compiled the binary but I am getting below error when running in a different environment as $CUSTOM_PATH is set to a different path.

I am getting errors only with libprun.a but not with other libraries.

Please suggest

2

You haven't given us much to go on here...

  1. What "below error" are you getting?
  2. What different environment are you talking about? Are you talking about just using a different setting for CUSTOM_PATH ? Are you talking about different operating systems? ???
  3. How is CUSTOM_PATH set when your code works?
  4. How is CUSTOM_PATH set when your code does not work?
  5. Does the file $CUSTOM_PATH/lib/libprun.a exist in the environment when your code does not work?
  6. What operating system are you using?
3

1) What "below error" are you getting?

error while loading shared libraries: /home/dev/lib/libprun.a: cannot open shared object file: No such file or directory.

2) What different environment are you talking about? Are you talking about just using a different setting for CUSTOM_PATH ? Are you talking about different operating systems? ???

3) How is CUSTOM_PATH set when your code works?

5) Does the file $CUSTOM_PATH/lib/libprun.a exist in the environment when your code does not work?

5) What operating system are you using?

4

By convention, a shared library would have the extension .so instead of .a .

What command do you use to build your program (in both environments)?

What output do you get from the commands:

for dir in /home/test/lib /home/dev/lib
do	echo "$dir:"
	ls -ld "$dir/"libprun.*
	file "$dir/"libprun.*
done
5

Here is the output which I am getting for the above piece of code.

6

You didn't my answer question about what command(s) you use to build your program, but it seems pretty obvious to me that you either need to:

  1. copy or link /home/test/lib/libprun.a to /home/dev/lib/libprun.a or
  2. change the way you build your program so that when it runs it loads /home/test/lib/libprun.a instead of /home/dev/lib/libprun.a .
7

Seems like all you need to do is modify the value of the CUSTOM_PATH environment variable...

8

Hi,

Attaching makefile for reference.

$INFINYS_ROOT in above makefile is different across different environments.

Thank you