Create NASMOPT variable, defaulting to -O9999.  Mostly there to test
beta versions of NASM.

A bunch of glibc header files were bogusly included.  We should not
depend on having a 32-bit glibc installed, since we don't use it.

Add the "nopass" option to completely remove the system drives.  This
is a pretty big hammer and is largely for debugging at this stage; it
probably needs more polishing before it can be made official.

Hello all,

I ran across a couple bugs in memdisk concerning hd images the other
day.  With the attached patch I've been able to successfully boot a
32MB gzipped hd image.  (I'll put the image up for a short while at
ftp://ftp.io.com/pub/usr/duanev/fdoshd.img.gz)

The pxelinux.cfg entry I'm using is:

    label fdos
        kernel memdisk
        append keeppxe initrd=fdoshd.img.gz

syslinux/memdisk is great, thanks Peter et. al.!

--
Duane Voth
duanev@io.com

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Small Perl script to postprocess the listfile and show absolute addresses
instead of section-relative.  This only applies to the main address, not
to addresses in bracketed fields.

Compiling as root is highly discouraged, but some people do it anyway.
gcc_ok, however, can clobber /dev/null due to "-o /dev/null"; this is
bad.  Instead, write a temporary file and delete it.