Issues with two versions of libstdC++.so Post: 302889060

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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

02-18-2014

Registered User

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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freealut-config

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

NAME

       freealut-config - script to get information about the installed version of freealut

SYNOPSIS

       freealut-config [ --prefix= DIR] [ --exec-prefix= DIR] [ --version ] [ --libs ] [ --cflags ]

DESCRIPTION

       freealut-config	is  a  tool  that is used to configure and determine the compiler and linker flags that should be used to compile and link
       progams, libraries, and plugins that use freealut.

       The use of freealut-config is deprecated. The more generic tool pkg-config should be used instead.

OPTIONS

       --cflags
	      Print the compiler flags that are necessary to compile a program or library that uses freealut.

       --exec-prefix=DIR
	      If specified, use DIR instead of the installation exec prefix that freealut was  build  with  when  computing  the  output  for  the
	      --cflags and --libs options.  This option must be specified before any of the --cflags and --libs options.

       --libs Print the linker flags that are necessary to link a program or library that uses freealut.

       --prefix=DIR
	      If  specified, use PREFIX instead of the installation prefix that freealut was built with when computing the output for the --cflags
	      and --libs options.  This option is also used for the exec prefix if --exec-prefix was not specified.  This option must be specified
	      before any of the --cflags and --libs options.

       --version
	      Prints the currently installed version of freealut on standard output.

EXAMPLES

       gcc -o main.o $(freealut-config --cflags) -c main.c
	      is how you might use freealut-config to compile a C source file for an executable program.

       gcc -o my_app $(freealut-config --libs) main.o util.o
	      is how you might use freealut-config to link compiled objects into an executable program.

SEE ALSO

       pkg-config(1)

       This manual page was written for sdl-config by Branden Robinson, originally for Progeny Linux Systems, Inc., and the Debian Project. It was
       adapted to freealut by Sam Hocevar.

freealut							    2003-11-22							freealut-config(1)