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Top Forums Programming Issues with two versions of libstdC++.so Post 302889060 by Praveen_218 on Tuesday 18th of February 2014 01:55:21 PM
Old 02-18-2014
Issues with two versions of libstdC++.so

I'm facing an issue in which my program is using a custom library (say, libxyz.so) which is compiled using libstdc++.so.5 and the system I'm using this library to create an executable from my program, has libstdc++so.6 as well as libstdc++.so.5; both available under /usr/lib directory.

There are multiple compilers available with the system (i.e gcc, g++34 and g++ version 4.*, IBM xlc).

When I compile my program, the resultant binary has to link libxyz.so (which has libstdc++.so.5 already) and based on further symbols need, it has to use libstdc++.so, but it by default links with libstdc++.so.6 and these two versions of libstdc++ gets its way into my executable.

This clearly shows up the cross links when done ldd on my executable. The program crashes when run. Because some classes are not compatible in libstdc++.so between versions 5 and 6.

Being C++ program, still I compiled and linked with gcc itself which is by default linking only with libstdc++.so.5 but had to use -fno-use-cxa_exception_ptr as flag to suppress the undefined reference issue on exception handling code. This made my binary having uniform links with libstdc++.so.5 through out and the program runs well. But this is just a work around and not an acceptable solution.

Is there a way, in which we can make g++ (or even g++34) to link explicitly with a particular library version overriding the default behavior to link with the latest version?

In that case I would prefer to link with libstdc++.so.5 through out.

Thanks a lot in advance for your suggestions / insight and for your precious time of course.

Regards,
PraveenK

---------- Post updated at 12:25 AM ---------- Previous update was at 12:05 AM ----------

It would also be great, if you suggest on editing the gcc/g++ compile specs. However that again is not a very open option if this is not an user account specific changes. Although I have the root access but would not be allowed to make system configuration changes.

Last edited by Praveen_218; 02-18-2014 at 02:50 PM.. Reason: Typo errors.
 

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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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