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Top Forums Programming Issues with two versions of libstdC++.so Post 302889233 by Praveen_218 on Wednesday 19th of February 2014 01:26:42 PM
Old 02-19-2014
Quote:
Originally Posted by fpmurphy
Have you tired putting libstdc++.so.5 in a different place and using LD_LIBRARY_PATH to point to that location?
Yes already tried. Even I created a soft link inside my present working directory to point to libstdc++.so.5; didn't work.

Did like this:
Code:
$ ln -s /usr/lib/libstdc++.so.5 libstdc++.so
$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:.

I also did
Code:
 $ strace g++ simpleTrialProgram.cpp -o someExe

Just to understand how g++ is finding libraries by default and found it looks to certain number of pre-defined directories one by one on a decreasing priority (including reaching a level to look inside /usr/lib folder).

But why g++ is choosing version 6 when the same /usr/lib folder has version 5 where as gcc chooses version 5 when the same directory has higher version 6 available to it.



There must be somewhere the information g++ is driving out to select a particular version over other, when multiple available.
 

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cc(1B)						     SunOS/BSD Compatibility Package Commands						    cc(1B)

NAME
cc - C compiler SYNOPSIS
/usr/ucb/cc [options] DESCRIPTION
/usr/ucb/cc is the interface to the BSD Compatibility Package C compiler. It is a script that looks for the link /usr/ccs/bin/ucbcc to the C compiler. The /usr/ccs/bin/ucbcc link is available only with the SPROcc package, whose default location is /opt/SUNWspro. The /usr/ucb/cc interface is identical to /usr/ccs/bin/ucbcc, except that BSD headers are used and BSD libraries are linked before base libraries. The /opt/SUNWspro/man/man1/acc.1 man page is available only with the SPROcc package. OPTIONS
The /usr/ucb/cc interface accepts the same options as /usr/ccs/bin/ucbcc, with the following exceptions: -Idir Search dir for included files whose names do not begin with a slash (/) prior to searching the usual directories. The directo- ries for multiple -I options are searched in the order specified. The preprocessor first searches for #include files in the directory containing sourcefile, and then in directories named with -I options (if any), then /usr/ucbinclude, and finally, in /usr/include. -Ldir Add dir to the list of directories searched for libraries by /usr/ccs/bin/ucbcc. This option is passed to /usr/ccs/bin/ld and /usr/lib. Directories specified with this option are searched before /usr/ucblib and /usr/lib. -Y P, dir Change the default directory used for finding libraries. EXIT STATUS
The following exit values are returned: 0 Successful compilation or link edit. >0 An error occurred. FILES
/usr/ccs/bin/ld link editor /usr/lib/libc C library /usr/ucbinclude BSD Compatibility directory for header files /usr/ucblib BSD Compatibility directory for libraries /usr/ucblib/libucb BSD Compatibility C library /usr/lib/libsocket library containing socket routines /usr/lib/libnsl library containing network functions /usr/lib/libelf library containing routines to process ELF object files /usr/lib/libaio library containing asynchronous I/O routines ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
ld(1), a.out(4), attributes(5) NOTES
The -Y P, dir option may have unexpected results and should not be used. SunOS 5.11 24 Feb 1998 cc(1B)
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