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Top Forums Programming Issues with two versions of libstdC++.so Post 302889104 by Praveen_218 on Wednesday 19th of February 2014 01:11:59 AM
Old 02-19-2014
Hi Jim,
Thanks for your response to my query.
No, I don't have the option to re-compile the library (say libxyz.so) and this is a black box to me being a 3rd party library package already compiled for my platform. This library using an older version of libstdc++.so.5; however my platform currently has libstdc++.so.6 (as well as libstdc++.so.5 co-existing) and the g++ compiler by default uses libstdc++.so.6 to link any code compiled on my platform (however gcc picks up libstdc++.so.5 by default).

Hence compiling a program which also uses libxyz.so through g++ is creating an undesired scenario by linking to some function calls using libstdc++.so.6 (by default) and some function calls residing into the library libxyz.so also is linked to my program as their API is called but those API's function definition has already linked to libstdc++.so.5

Hence I get an executable which has function calls linking to two versions of libstdc++.so. This creates problem while execution and dumps code.

All I need is a way to override the library selection behavior by the compiler/linker so that I can choose to link to a particular version of my choice at the link time.

I essentially want to link all my programs to libstdc++.so.5 and NOT with libstdc++.so.6

I tried "ldconfig" utility to change behavior by following (as a root):

Code:
# ldconfig -p > ldconf.conf

The file "ldconf.conf" thus produced had libstdc++.so.6 listed just prior to libstdc++.so.5; so I swapped their positions and did the following:

Code:
# ldconfig -f ldconf.conf

I received errors like (didn't work):
Code:
# ldconfig -f ldconf.conf
...
...
ldconfig: > /usr/lib64/libtag.so.1 is not a known library type
ldconfig: > /usr/lib64/libsysfs.so.2 is not a known library type
ldconfig: > /usr/lib64/libstdc++.so.5 is not a known library type
ldconfig: > /usr/lib/libstdc++.so.5 is not a known library type
ldconfig: > /usr/lib64/libstdc++.so.6 is not a known library type
ldconfig: > /usr/lib/libstdc++.so.6 is not a known library type
ldconfig: > /usr/lib/libstdc++-libc6.2-2.so.3 is not a known library type
ldconfig: > /usr/lib64/libstartup-notification-1.so.0 is not a known library type
ldconfig: > /usr/lib64/libsss_idmap.so.0 is not a known library type
ldconfig: > /usr/lib64/libssl3.so is not a known library type
...
...
ldconfig: > /lib64/ld64.so.1 is not a known library type
ldconfig: > /lib/ld.so.1 is not a known library type
ldconfig: Can't create temporary cache file /etc/ld.so.cache~: Permission denied

 

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

NAME
raptor-config - script to get information about the installed version of Raptor SYNOPSIS
raptor-config [--cflags] [--options] [--help] [--libs] [--libtool-libs] [--private-libs] [--prefix[=DIR]] [--version-decimal] [--version] DESCRIPTION
raptor-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 Raptor RDF parser library. OPTIONS
raptor-config accepts the following options: --cflags Print the compiler flags that are necessary to compile a raptor program. --options Print raptor compiled options such as parsers and serializers available, the XML parser used (if any) and the WWW retrieval library used (if any). --help Print a help message summarising usage. --libs Print the linker flags that are necessary to link a raptor program. This excludes linker arguments used to build the raptor shared library. --libtool-libs Print the path to the libtool file for raptor. --private-libs Print the linker flags that are necessary to build the raptor shared library. This option is not usually needed because the raptor shared library has already been dynamically linked against these flags. --prefix=PREFIX If specified, use PREFIX instead of the installation prefix that raptor was built with when computing the output for the --cflags and --libs options. This option must be specified before any --libs or --cflags options. --version Print the currently installed version of raptor on the standard output. --version-decimal Print the currently installed version of raptor as a decimal integer. SEE ALSO
libraptor(3) AUTHOR
Dave Beckett - http://www.dajobe.org/ <http://www.dajobe.org/> 2008-04-01 raptor-config(1)
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