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OS is Ubuntu 10.04.
I need to compile some C++ code with -std=c++0x flag. But compiling doesn't work because I need 4.6.1 version.
Now, when I go to Gnu's ftp, I see two different packages: 

gcc-4.6.1   
gcc-g++-4.6.1

Knowing that I need to compile C++0x code, which one should I download, and how do I install it/them?
I already installed these libraries (gmp, mpc and mpfr).

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You'll likely need both of those and then some. Grab gcc-g++ first. Then see what it says it needs in order to install. – David Schwartz Oct 20 '11 at 20:05
GCC originally meant GNU C Compiler. Now it's GNU Compiler Collection. The g++ program is in fact the C++ compiler part of it. The idea is that if you for example only want to use C++ compiler, you don't have to download for example the Ada compiler which is also part of GCC. – AndrejaKo Oct 20 '11 at 22:50
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I googled around for a few minutes, and found quite a few things, mostly involving compiling for some iPhone stuff. It appears that you just need to use GCC 4.6. As said in the comments, you will likely need both though, since it is still experimental.

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