erl boot flags

[Ulf Wiger (AL/EAB)]

I was trying to match the following printout from OTP R10B-2 against the documentation:

Usage: erl [-version] 
           [-sname NAME | -name NAME] 
           [-noshell]
           [-noinput]
           [-env VAR VALUE]
           [-compile file ...]
           [-make]
           [-man [manopts] MANPAGE]
           [-x]
           [-emu_args]
           [+i BOOT_MODULE]
           [+b BOOT_FUN]
           [+s STACK_SIZE]
           [+h HEAP_SIZE]
           [+# ITEMS]
           [+P MAX_PROCS]
           [+A THREADS]
           [+R COMPAT_REL]
           [+K BOOLEAN]
           [+M<SUBSWITCH> <ARGUMENT>]
           [args ...]

The flags above that I don't find documentation for are:

   -x
   +i BOOT_MODULE
   +b BOOT_FUN
   +s STACK_SIZE
   +# ITEMS

(Does that mean that they are not supported?)

The following flags are, I guess, understood to be part of [args ...],
as they all appear in the erl(3) manual as supported:

   -AppName Key Value
   -boot File
   -boot_var Var Directory [Var Directory]
   -config Config
   -connect_all false
   -cookie
   -detached
   -eval Expr
   -extra
   -heart
   -hidden
   -hosts Hosts
   -id Id
   -instr
   -loader Loader
   -mode Mode
   -nostick
   -oldShell
   -pa Directories
   -pz Directories
   -remsh Node
   -rsh Program
   -run Mod [Fun [Args]]
   -s Mod [Fun [Args]]
   -setcookie Cookie
   +B [i]
   +l
   +v
   +V

Were the five options (-x, +i, +b, +s, +#) left out on purpose? 
Are there other flags supported by erl that were listed neither 
in the help message nor in the manual?

I admit I haven't searched the erts source for answers.

I maintain that there should be a section in the documentation briefly 
listing unsupported functions and options.

/Uffe