Modify g++ library path

I recently installed gcc 4.9.2 and found a problem when linking with libs.

The output for search path:

install: /usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/
programs: =/usr/libexec/gcc/x86_64-unknown-linux-gnu/4.9.2/:/usr/libexec/gcc/x86_64-unknown-linux-gnu/4.9.2/:/usr/libexec/gcc/x86_64-unknown-linux-gnu/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/:/usr/lib/gcc/x86_64-unknown-linux-gnu/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../x86_64-unknown-linux-gnu/bin/x86_64-unknown-linux-gnu/4.9.2/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../x86_64-unknown-linux-gnu/bin/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../x86_64-unknown-linux-gnu/bin/
libraries: =/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../x86_64-unknown-linux-gnu/lib/x86_64-unknown-linux-gnu/4.9.2/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../x86_64-unknown-linux-gnu/lib/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../x86_64-unknown-linux-gnu/lib/../lib64/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../x86_64-unknown-linux-gnu/4.9.2/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../lib64/:/lib/x86_64-unknown-linux-gnu/4.9.2/:/lib/x86_64-linux-gnu/:/lib/../lib64/:/usr/lib/x86_64-unknown-linux-gnu/4.9.2/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../../x86_64-unknown-linux-gnu/lib/:/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/../../../:/lib/:/usr/lib/

Really, the problematic thing is this:

/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib64/

I need to change the order of these two libs(so that lib64 has higher search priority), because both dirs have the libstdc++.so.6, and I need to use the one in lib64 folder.

How do I do it?

Please don't:

1, suggest that I change LD_LIBRARY_PATH to explicitly include libstdc++.so.6 as I'm sure there are other things in x86_64-linux-gnu folder that are older versions of that in the lib64 folder - I upgraded g++ from an older version.

2, suggest that I explicitly include that lib64/libstdc++.so.6 in the g++ -L option.

Thanks a lot.