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gentoo/Setup.md

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General Setup

Follow the Gentoo Handbook for installing Gentoo

Gentoo Handbook

Generally, you can just use the amd64 version of Gentoo, as most servers now are 64-bit compatible

amd64 handbook

  1. When getting the two tarballs for stage3 and portage, I recommend first retrieving the tarball, then retrieving portage, before extracting either. This way you only have to use links once.

    1. run links http://www.gentoo.org/main/en/mirrors.xml
    2. Go to releases -> amd64 -> autobuilds and select an appropriate stage3. Hardened is recommended for a server.
    3. Go up until you reach the first mirror directory. Go to the snapshots folder and download portage-latest.tar.bz2
    4. Extract the stage3 tarball : tar xvjpf stage3-*.tar.bz2
    5. Extract portage tar xvjf /mnt/gentoo/portage-latest.tar.bz2 -C /mnt/gentoo/usr

  2. In your /etc/make.conf file, I recommend the following for compile options:

    • CFLAGS="-0s -pipe -march=native -pthread""
    • Set the MAKEOPTS property to 2x the number of processors/cores, eg, dual core would be MAKEOPTS="-j4"

  3. Set your profile to a server profile, optionally, set it to a hardened server profile.

  4. Compile the kernel using genkernel, as it's less involved than manually configuring everything for the kernel.

Install LLVM/Clang (Optional)

Clang is a faster compiler than the default GCC. It produces binary as fast, or faster than GCC. To set up clang, 

run `emerge llvm clang`

and add these to lines to the top of your `/etc/make.conf` file

	CC=/usr/bin/clang
	CXX=/usr/bin/clang++
	
If a package fails to compile with clang, you can comment out those lines, and recompile the package with GCC.