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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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std::placeholders(3)					     Library Functions Manual					      std::placeholders(3)

NAME
std::placeholders - SYNOPSIS
Variables const _Placeholder< 1 > _1 const _Placeholder< 10 > _10 const _Placeholder< 11 > _11 const _Placeholder< 12 > _12 const _Placeholder< 13 > _13 const _Placeholder< 14 > _14 const _Placeholder< 15 > _15 const _Placeholder< 16 > _16 const _Placeholder< 17 > _17 const _Placeholder< 18 > _18 const _Placeholder< 19 > _19 const _Placeholder< 2 > _2 const _Placeholder< 20 > _20 const _Placeholder< 21 > _21 const _Placeholder< 22 > _22 const _Placeholder< 23 > _23 const _Placeholder< 24 > _24 const _Placeholder< 25 > _25 const _Placeholder< 26 > _26 const _Placeholder< 27 > _27 const _Placeholder< 28 > _28 const _Placeholder< 29 > _29 const _Placeholder< 3 > _3 const _Placeholder< 4 > _4 const _Placeholder< 5 > _5 const _Placeholder< 6 > _6 const _Placeholder< 7 > _7 const _Placeholder< 8 > _8 const _Placeholder< 9 > _9 Detailed Description ISO C++11 entities sub-namespace for functional. Author Generated automatically by Doxygen for libstdc++ from the source code. libstdc++ Tue Jun 10 2014 std::placeholders(3)
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