fhs

[Xose Vazquez Perez]

Alan Cox wrote:

> /usr/src/linux is Linus own official building place for kernels and the
> one all documentation uses, so the FHS won't get very far on that other than
> laughed out of existance

README file, of linux-2.4.24-pre2, is very clear here:

--cut--
[...]

INSTALLING the kernel:

 - If you install the full sources, put the kernel tarball in a
   directory where you have permissions (eg. your home directory) and
   unpack it:

                gzip -cd linux-2.4.XX.tar.gz | tar xvf -

   Replace "XX" with the version number of the latest kernel.

   Do NOT use the /usr/src/linux area! This area has a (usually
   incomplete) set of kernel headers that are used by the library header
   files.  They should match the library, and not get messed up by
   whatever the kernel-du-jour happens to be.

[...]
--end--

/usr must be a read only and very static fs.

"/usr is the second major section of the filesystem. /usr is shareable,
read-only data. That means that /usr should be shareable between various
FHS-compliant hosts and must not be written to. Any information that is
host-specific or varies with time is stored elsewhere."

"/usr/src : Source code (optional)
Purpose

Source code may be place placed in this subdirectory, only for reference purposes.*


* Generally, source should not be built within this hierarchy."