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

    -t          assemble in SciTech TASM compatible mode
    -g          generate debug information in selected format.
    -E (or -e)  preprocess only (writes output to stdout by default)
    -a          don't preprocess (assemble only)
    -M          generate Makefile dependencies on stdout
    -MG         d:o, missing files assumed generated

    -Z<file>    redirect error messages to file
    -s          redirect error messages to stdout

    -F format   select a debugging format

    -I<path>    adds a pathname to the include file path
    -O<digit>   optimize branch offsets (-O0 disables, default)
    -P<file>    pre-includes a file
    -D<macro>[=<value>] pre-defines a macro
    -U<macro>   undefines a macro
    -X<format>  specifies error reporting format (gnu or vc)
    -w+foo      enables warning foo (equiv. -Wfoo)
    -w-foo      disable warning foo (equiv. -Wno-foo)
Warnings:
    error                   treat warnings as errors (default off)
    macro-params            macro calls with wrong parameter count (default on)
    macro-selfref           cyclic macro references (default off)
    macro-defaults          macros with more default than optional parameters (default on)
    orphan-labels           labels alone on lines without trailing `:' (default on)
    number-overflow         numeric constants does not fit in 64 bits (default on)
    gnu-elf-extensions      using 8- or 16-bit relocation in ELF32, a GNU extension (default off)
    float-overflow          floating point overflow (default on)
    float-denorm            floating point denormal (default off)
    float-underflow         floating point underflow (default off)
    float-toolong           too many digits in floating-point number (default on)

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 <form> -y.