depmod man page on YellowDog

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depmod(8)							     depmod(8)

NAME
       depmod — program to generate modules.dep and map files.

SYNOPSIS
       depmod  [-b basedir]  [-e]  [-F System.map]  [-n]  [-v]	[version]  [-A
       ]

       depmod [-e]  [-FSystem.map]  [-n]  [-v]	[version]  [filename ...]

DESCRIPTION
       Linux kernel modules can provide services (called "symbols") for	 other
       modules	to  use (using EXPORT_SYMBOL in the code).  If a second module
       uses this symbol, that second module clearly depends on the first  mod‐
       ule.  These dependencies can get quite complex.

       depmod  creates	a  list of module dependencies, by reading each module
       under /lib/modules/version and determining what symbols it exports, and
       what  symbols it needs.	By default this list is written to modules.dep
       in the same directory.  If filenames are given  on  the	command	 line,
       only  those  modules  are  examined (which is rarely useful, unless all
       modules are listed).

       If a version is provided, then that kernel version's  module  directory
       is  used, rather than the current kernel version (as returned by "uname
       -r").

       depmod will also generate various map files in this directory, for  use
       by the hotplug infrastructure.

OPTIONS
       -b basedir --basedir basedir
		 If  your  modules are not currently in the (normal) directory
		 /lib/modules/version, but in a staging area, you can  specify
		 a  basedir  which  is	prepended to the directory name.  This
		 basedir is stripped from the resulting modules.dep  file,  so
		 it is ready to be moved into the normal location.

       -e --errsyms
		 When  combined	 with  the -F option, this reports any symbols
		 which a module needs which are not supplied by other  modules
		 or the kernel.	 Normally, any symbols not provided by modules
		 are assumed to be provided by the  kernel  (which  should  be
		 true in a perfect world).

       -F --filesyms System.map
		 Supplied  with	 the  System.map  produced when the kernel was
		 built, this allows the -e option to  report  unresolved  sym‐
		 bols.

       -n --dry-run
		 This  sends  the  resulting modules.dep, then the various map
		 files, to standard output, rather than writing them into  the
		 module directory.

       -A --quick
		 This  option  scans  to see if any modules are newer the mod‐
		 ules.dep file before any work is done: if  not,  it  silently
		 exits rather than regenerating the files.

BACKWARDS COMPATIBILITY
       This  version of depmod is for kernels 2.5.48 and above.	 If it detects
       a kernel with support for old-style modules, or the  version  specified
       is before 2.5.48, it will attempt to run depmod.old in its place, so it
       is completely transparent to the user.

COPYRIGHT
       This manual page Copyright 2002, Rusty Russell, IBM Corporation.

SEE ALSO
       modprobe(8), modules.dep(5), depmod.old(8)

								     depmod(8)
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