Gentoo Linux AMD64 Handbook

Gentoo Linux AMD64 Handbook
Digest Verification Failures ................................................................... 79
14. USE flags ..................................................................................................... 80
What are USE flags ................................................................................... 80
The ideas behind USE flags .................................................................. 80
Definition of a USE flag ...................................................................... 80
What USE flags exist ......................................................................... 80
Using USE flags ......................................................................................... 80
Declare permanent USE flags ................................................................ 80
Declaring USE flags for individual packages ............................................ 81
Declare temporary USE flags ................................................................ 82
Precedence ......................................................................................... 82
Adapting your Entire System to New USE Flags ....................................... 82
Package specific USE flags ........................................................................... 83
Viewing available USE flags ................................................................. 83
15. Portage Features ............................................................................................ 85
Portage Features .......................................................................................... 85
Distributed Compiling .................................................................................. 85
Using distcc ....................................................................................... 85
Installing distcc ................................................................................... 85
Activating Portage Support ................................................................... 85
Caching Compilation ................................................................................... 86
About ccache ...................................................................................... 86
Installing ccache ................................................................................. 86
Activating Portage Support ................................................................... 86
Using ccache for non-Portage C Compiling .............................................. 87
Binary Package Support ............................................................................... 87
Creating Prebuilt Packages .................................................................... 87
Installing Prebuilt Packages ................................................................... 87
Fetching Files ............................................................................................. 88
Parallel fetch ...................................................................................... 88
Userfetch ........................................................................................... 88
Pulling Validated Portage Tree Snapshots ........................................................ 88
16. Initscripts ...................................................................................................... 90
Runlevels ................................................................................................... 90
Booting your System ........................................................................... 90
Init Scripts ......................................................................................... 90
How Init Works .................................................................................. 90
What is a runlevel .............................................................................. 91
Working with the Init Scripts ................................................................ 92
Working with rc-update ................................................................................ 93
What is rc-update .............................................................................. 93
Adding and Removing Services ............................................................. 93
Configuring Services .................................................................................... 93
Why the Need for Extra Configuration .................................................. 93
The /etc/conf.d Directory ...................................................................... 94
Writing Init Scripts ...................................................................................... 94
Do I Have To ................................................................................... 94
Layout ............................................................................................... 94
Dependencies ...................................................................................... 94
Controlling the Order ........................................................................... 95
Standard Functions .............................................................................. 96
Adding Custom Options ....................................................................... 97
Service Configuration Variables ............................................................. 98
Changing the Runlevel Behaviour .................................................................. 98
Who might benefit from this ................................................................ 98
Using softlevel .................................................................................... 98
Using bootlevel ................................................................................... 99
17. Environment Variables .................................................................................. 100
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