Hi
I want to install and setup new version of GCC on my Debian,so for this work I must compile last version of GCC for install new version be completed
I do not know how can i do this?
Or,Is it true that for setup new version of GCC,I must compile last version?
please help me.

Sorry, but why not just install the package. You can use one of the two commands given below. The commands must be run as root or you can use sudo if you prefer.
Once installed, gcc is ready for use.
jdk

Welcome to LQ.

# apt-get install g++
... to get a fully working gcc.
I.e. the packages { libc-dev, libc-dev-bin, linux-libc-dev, etc.}
that will make gcc work, will be installed as dependencies.

Remark : You cannot compile gcc without the above prerequisites,
and then some https://packages.debian.org/source/wheezy/gcc-4.7

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It is more the opposite of what you said. In order to compile a newer version of GCC, you must first use the package manager in Debian to install some nearly current version of GCC.

Getting GCC source code and compiling it is a bit complicated for a Linux newbie. Are you sure it is something you want to do?

1) Check in your package manager, what is the newest GCC you can install via the package manager. Are you sure that isn't new enough?

2) Maybe you can find a newer GCC in a .deb file (meaning already compiled). That is harder than installing the one offered by the package manager, but easier than compiling.

3) GCC source code does come with pretty clear instructions for compiling it and for making the new one be a version-named alternative to the one installed by the package manager (so the two versions can co exist and you can select which one to use for any specific operation). You do need to be competent at command line Linux and you need to pat attention to details when reading those instructions.

Thanks.
I want to know that I must install all packages?

# 5 .

As post #3 says, the one command # apt-get install g++
.. will take care that you get a fully working gcc.
Just try it, and you can watch the text that shows
all the other packages that will be installed.

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