Where did SELinux go?

Question

I am compiling a new kernel, and want to enable SELinux but don't see it in menuconfig anywhere. The only framework under security options is Tomoyo.....so I ask, what happened to SELinux? Both 2.6.33.2 and 2.6.35.11 do not seem to have it present....

Answer 1

[Copying Jace's comment into a full answer]

Auditing must first be enabled from general setup. From Linux Kernel in a Nutshell:

SELinux requires that the networking option be enabled. See the section called “Networking” to enable this.

SELinux also requires that audit be enabled in the kernel configuration. To do this:

 General setup
     [*] Auditing support

Also, the networking security option must be enabled:

 Security options
     [*] Enable different security models
     [*]   Socket and Networking Security Hooks

Now it is possible to select the SELinux option:

Security options
    [*] Enable different security models
    [*] NSA SELinux Support 

There are also a number of individual SELinux options that you might wish to enable. Please see the help for the individual different items for more descriptions on what they do in.

 Security options
     [*] Enable different security models
     [*] NSA SELinux Support
     [ ]   NSA SELinux boot parameter
     [ ]   NSA SELinux runtime disable
     [*]   NSA SELinux Development Support
     [*]   NSA SELinux AVC Statistics
     (1)   NSA SELinux checkreqprot default value