Conditional compilation

[Kragen Sitaker]

Fernando Pérez <fperez528 at yahoo.com> writes:
> James J. Besemer wrote:
> > This is not as fully general as #ifdef but since even declarations are
> 
> Why not just use #ifdef? ;)

cpp will choke on strings spanning multiple lines; it knows too much
about C syntax.  You could use m4.

My usual way to comment out a block is to highlight it and type
control-C #, which comments out the block.  But I use Emacs.