usage: nasm [-@ response file] [-o outfile] [-f format] [-l listfile]
[options...] [--] filename
or nasm -r for version info (obsolete)
or nasm -v for version info (preferred)

-t Assemble in SciTech TASM compatible mode
-g Generate debug information in selected format.
-e preprocess only (writes output to stdout by default)
-a don't preprocess (assemble only)
-M generate Makefile dependencies on stdout

-E redirect error messages to file
-s redirect error messages to stdout

-F format select a debugging format

-I adds a pathname to the include file path
-O optimize branch offsets (-O0 disables, default)
-P pre-includes a file
-D[=] pre-defines a macro
-U undefines a macro
-X specifies error reporting format (gnu or vc)
-w+foo enables warnings about foo; -w-foo disables them
where foo can be:
macro-params macro calls with wrong no. of params (default off)
macro-selfref cyclic macro self-references (default off)
orphan-labels labels alone on lines without trailing `:' (default off)
number-overflow numeric constants greater than 0xFFFFFFFF (default on)
gnu-elf-extensions using 8- or 16-bit relocation in ELF, a GNU extension (default off)

response files should contain command line parameters, one per line.

For a list of valid output formats, use -hf.
For a list of debug formats, use -f

-y.