&library-config; The instructions given above make compatibility symlinks that pre-compiled packages in BLFS require. You may create additional compatibility links based on your requirements. If you only need the gcc-&gcc2-version; libraries, you may delete /opt/gcc-&gcc2-version;. Whenever you need to use gcc-&gcc2-version; instead of you system installed compiler, add /opt/gcc-&gcc2-version;/bin to the front of your PATH or (preferably) set the CC environment variable before compiling the concerned package.