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Full Discussion: Specifying dynamic library path to linker at compile time
Top Forums Programming Specifying dynamic library path to linker at compile time Post 302882013 by waavman on Friday 3rd of January 2014 02:11:33 PM
Old 01-03-2014
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 03:32 PM.. Reason: Please use code tags
 

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LEARN ABOUT SUSE

redland-config

redland-config(1)					      General Commands Manual						 redland-config(1)

NAME

       redland-config - script to get information about the installed version of Redland

SYNOPSIS

       redland-config [--cflags] [--help] [--libs] [--libtool-libs] [--prefix[=DIR]] [--private-libs] [--version-decimal] [--version]

DESCRIPTION

       redland-config  is  a tool that is used to determine the compile and linker flags that should be used to compile and link programs that use
       the Redland RDF library.

OPTIONS

       redland-config accepts the following options:

       --version
	       Print the currently installed version of redland on the standard output.

       --version-decimal
	       Print the currently installed version of redland as a decimal integer.

       --libs  Print the linker flags that are necessary to link a redland program.  This excludes linker  arguments  used  to	build  the  librdf
	       shared library.

       --libtool-libs
	       Print the flags that are necessary to link a redland program with libtool.

       --private-libs
	       Print the linker flags that are necessary to build the librdf shared library.  This option is not usually needed because the librdf
	       shared library has already been dynamically linked against these libs.

       --cflags
	       Print the compiler flags that are necessary to compile a redland program.

       --prefix=PREFIX
	       If specified, use PREFIX instead of the installation prefix that redland was built with when computing the output for the  --cflags
	       and --libs options. This option must be specified before any --libs or --cflags options.

SEE ALSO

       redland(3),

AUTHOR

       Dave Beckett - http://www.dajobe.org/ <http://www.dajobe.org/>

								    2008-09-07							 redland-config(1)
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