Specifying dynamic library path to linker at compile time


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Programming Specifying dynamic library path to linker at compile time
# 1  
Specifying dynamic library path to linker at compile time

I would like to compile a binary that doesnot depend on LD_LIBRARY_PATH as this binary will be setuid to owner and used by other users and since setuid doesnot support LD_LIBRARY_PATH making it independent of LD_LIBRARY_PATH would be great.

But I am not able to specify the path of the shared libraries to the linker at compile time. I am using gcc compiler 4.1.2 and on Linux OS Red Hat 5.8. I am using the following compile command where /aaa/bbb/lib is the path of the shared library that is used by the binary waitdb.ORACLE called within the binary simple:

Code:
gcc simple.c -Wl,-rpath=/aaa/bbb/lib -o simple

simple.c has nothing but an execvp call to another binary 'waitdb.ORACLE' which uses libuidata.so that is located in /aaa/bbb/lib directory
Contents of simple.c are as follows:

Code:
#include <stdio.h>
int main(int argc, char* argv[])
{
        char* args[3];
        args[0]="/aaa/bbb/bin/waitdb.ORACLE";
        args[1]=NULL;
        printf ("before executing execvp\n");
        execvp (args[0],args);
        printf ("after executing execvp\n");
}

But when I run the executable 'simple' I get the following error

Code:
[acdev2@hostname tmp]$ ./simple
before executing execvp
/aaa/bbb/bin/waitdb.ORACLE: error while loading shared libraries: libuidata.so: cannot open shared object file: No such file or directory

On the other hand if I run at the commandline, the export LD_LIBRARY_PATH command before calling the binary it works FINE.

Code:
[acdev2@hostname tmp]$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/aaa/bbb/lib
[acdev2@hostname1 tmp]$ ./simple
before executing execvp
+++INFO+++ 20140103_13:54:32 @(#)waitdb[6.2/$Revision: 5538 $]: RDBMS DNYASC01 is accepting connections

Please advise how I can specify the /aaa/bbb/lib path to the linker at compile time of binary 'simple' so that when 'simple' binary tries to execvp another c binary 'waitdb.ORACLE' binary within it the linker knows where to find the libuidata.so shared library file that waitdb.ORACLE uses (without using the LD_LIBRARY_PATH variable) ?

thanks

Last edited by bartus11; 01-03-2014 at 04:32 PM.. Reason: Please use code tags
# 2  
-rpath is for the C-program ("simple") itself, not passed to the "exec"ed program.
But you can define the LD_LIBRARY_PATH environment variable in the C-program:
Code:
putenv ("LD_LIBRARY_PATH=/aaa/bbb/bin/waitdb.ORACLE");
execvp ...

Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #927
Difficulty: Medium
32-bit versions of the Unix time stamp will cease to work at 03:14:08 UTC on Tuesday, 19 January 2038.
True or False?

10 More Discussions You Might Find Interesting

1. Programming

Gcc linker search path order

I have a build where I wish to link against and load a specific version of a library and a different version of the same library is installed on the system. I'm using a -L option to point to the version that I wish to link against but gcc still seems to choose the installed version. Is there a way... (4 Replies)
Discussion started by: Richard Johnson
4 Replies

2. Programming

problem in dynamic library*.so

hello I apologize if my question bothers you I work on a code developed in C + + which worked well on mac os, this code will help create libraries *.so from *.cc and *.h I used this as flags:CXXFLAGS = -g -O2 -fPIC -Wall -ldl -D_GNU_SOURCE ,CXX := g++ and $(CXX)-shared -o $(LIBNAME) $(CLIBLIB)... (0 Replies)
Discussion started by: pheapc
0 Replies

3. Programming

C Library reference error using sqrt() - will not compile.

This so basic that it should work.... Any ideas would be appreciared. Using a number directly in the sqrt allows it to compile. primrose > cat a.c #include <stdio.h> #include <math.h> int main(void) { double abcd=9; printf("%f\n",sqrt(abcd)); } primrose > gcc a.c Undefined first... (2 Replies)
Discussion started by: plastichead
2 Replies

4. SCO

SCO openserver Dynamic linker corruption

Hi every body I have a problem like that "Dynamic linker error" message. I can't load many of programs in sco unix openserver 5.0.6. I guess this problem appear after my last effort to install "SCO Development System" package. How can I fix this problem? would you please help me ? (1 Reply)
Discussion started by: javad1_maroofi
1 Replies

5. Programming

Dynamic library load with dlopen

Hi, I created two library libsum.so and libproduct.so. In the libproduct.so is defined function "product" that use function "sum" defined in libsum.so. So libproduct depends on libsum. In main function I called product function by a dlopen request. Unfortunaly, when I execute program I have an... (5 Replies)
Discussion started by: shade82
5 Replies

6. HP-UX

dynamic linker error

Hi All Could anyone help in giving a little background to the following runtime error. /usr/lib/pa20_64/dld.sl: Mmap failed due to errno: 13. Seen when executing a 64-bit ELF executable. Thanks Ed (3 Replies)
Discussion started by: C3000
3 Replies

7. Programming

overriding the dynamic library

Hi, I wonder how can we override the dynamic library loaded by ld on start up.(dynamic linked application). so that linker uses the new library to find symbols. Is it possible to do. Cheers. (4 Replies)
Discussion started by: Raom
4 Replies

8. Programming

loading a dynamic library in linux

is there a way to load a dynamic library in linux? I know tht in AIX u can do it using the loadAndInit() function. Please guide me (2 Replies)
Discussion started by: jacques83
2 Replies

9. Programming

How compile a library on solaris(like dll in windows)

Hi all, how do i compile a c program into a library on solaris Thanks in advance Zing (3 Replies)
Discussion started by: zing
3 Replies

10. Programming

how to auto load a dynamic library

hi, every body. i have in trouble that how to load a dynamic library by hand. for example, i know how to generate a dynamic library and how to link a dynamic library in makefile. generate a dynamic library: add -dy -G behind cc link a dynamic library in makefile: add -dy -Bdynamic behind cc... (0 Replies)
Discussion started by: subrain
0 Replies

Featured Tech Videos