as.info: Comments

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Comments

   There are two ways of rendering comments to `as'.  In both cases the
comment is equivalent to one space.
   Anything from `/*' through the next `*/' is a comment.  This means
you may not nest these comments.
     /*
       The only way to include a newline ('\n') in a comment
       is to use this sort of comment.
     */
     /* This sort of comment does not nest. */
   Anything from the "line comment" character to the next newline is
considered a comment and is ignored.  The line comment character is `;'
for the AMD 29K family; `;' on the ARC; `@' on the ARM; `;' for the
H8/300 family; `!' for the H8/500 family; `;' for the HPPA; `#' on the
i386 and x86-64; `#' on the i960; `;' for picoJava; `!' for the Hitachi
SH; `!' on the SPARC; `#' on the m32r; `|' on the 680x0; `#' on the
68HC11 and 68HC12; `#' on the Vax; `!' for the Z8000; `#' on the V850;
see *Note Machine Dependencies::.
   On some machines there are two different line comment characters.
One character only begins a comment if it is the first non-whitespace
character on a line, while the other always begins a comment.
   The V850 assembler also supports a double dash as starting a comment
that extends to the end of the line.
   `--';
   To be compatible with past assemblers, lines that begin with `#'
have a special interpretation.  Following the `#' should be an absolute
expression (*note Expressions::): the logical line number of the _next_
line.  Then a string (*note Strings: Strings.) is allowed: if present
it is a new logical file name.  The rest of the line, if any, should be
whitespace.
   If the first non-whitespace characters on the line are not numeric,
the line is ignored.  (Just like a comment.)
                               # This is an ordinary comment.
     # 42-6 "new_file_name"    # New logical file name
                               # This is logical line # 36.
   This feature is deprecated, and may disappear from future versions
of `as'.