Tutorial on building whole toolchain on CentOS

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http://stackoverflow.com – I am working on CentOS 6 machines, which has very old GCC/GlibC version. I want to build the whole glibc, binutils, gcc toolchain with latest or at least very recent versions in order to use c++11 support in latest gcc, and ld.gold in recent binutils, and possibly improvements in recent glibc. I want to put the whole toolchain in some separate directory, and not to influence any existing system files. I also want to build gcc with --sys-root so that when using the gcc, I don't need to specify -I/some/directory/include and -L/some/directory/lib or whatever other parameters. Also the generat (HowTos)