Make.conf

2009-12-24T00:47:07Z

Licked:

== Make.conf ==
In [[genToo]] your make.conf file located in /etc/make.conf is used by [[portage]] as its primary source of information on how to setup your system. Within your make.conf file you will find a host of options that will determine what and how your system will function.

==Standard Fields==
===CFLAGS===
These flags tell the compiler what type of system you are using along with any optimizations you would like to include. For example a typical AMD64 setup may look like so: 
:CFLAGS="-march=athlon64 -O2 -pipe"

===CHOST===
This variable is set during install and should only be edited if you know what you are doing. It tells the computer what architecture you are running. 
:CHOST="x86_64-pc-linux-gnu"

===CXXFLAGS===
This variable is generally set to mirror your CFLAGS setting, but can be set differently, again, if you know what you are doing. 
:CXXFLAGS="${CFLAGS}"

===MAKEOPTS===
This option tells the complier how many simultaneous threads it can compile at one time. Thus it usually set at your processor plus one. So for a single core processor: 
:MAKEOPTS="-j2"

===GENTOO_MIRRORS===
This setting tells [[portage]] which servers it can search for the programs you wish to install.

===SYNC===
This option tells [[portage]] which server to use in order to sync itself. After syncing [[portage]] will then know what the latest version of each file is and have an update collection of ebuilds to build packages with.

===USE===
This is the variable for which [[Gentoo]] is famous. Here you tell what settings you like to take effect system wide. For a fresh install which will eventually use Gnome, a good example would be: 
:USE="gtk gnome X alsa cdr dvd"

===VIDEO_CARDS===
This variable is used by [[portage]] so when emerging X it knows which drivers to pull in. If you had an nVidia card for example: 
:VIDEO_CARDS="nvidia"

===INPUT_DEVICES===
This variable again is used by [[portage]] in order to know which packages it needs to pull in while emerge X. A typical setup would look like:
:INPUT_DEVICES="keyboard mouse"

==Non-Standard Fields==
The above list only included options that standard to every make.conf file. There are naturally other options that you can include in your make.conf to further refine your system.

===FEATURES===
The variable allows you to enable and disable various features of [[portage]] that are not enabled or disabled by default.
:FEATURES="sandbox ccache"

===EMERGE_DEFAULT_OPS===
This option allows you to set which options you would want [[portage]] to always use when issuing a command. For example if you want [[portage]] to always run in verbose mode:
:EMERGE_DEFAULT_OPTS="--verbose"

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Make.conf