depmod : generate modules.dep and map files
[SYNOPSIS] depmod OPTION (MODULE)
OPTION
-a Probe all modules. This option is enabled by default if no file names are given in the command-line.
-A This option scans to see if any modules are newer than the modules.dep file before any work is done.
if not, it silently exits rather than regenerating the files.
-b 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.
-C file This option overrides the default configuration file at /etc/depmod.conf (or the /etc/depmod.d/ directory if that is not found).
-e 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 System.map Supplied with the System.map produced when the kernel was built, this allows the -e option to report unresolved symbols.
-h Print the help message and exit.
-n This sends the resulting modules.dep and the various map files to standard output rather than writing them into the module directory.
-v In verbose mode, depmod will print (to stdout) all the symbols each module depends on and the module's file name which provides that symbol.
-V Show version of program and exit. See below for caveats when run on older kernels.