Text file cbind.c contains a C binding of the IMFORT procedures for UNIX.  A
related article can be found in IRAF Newsletter #6, February 1989, "Calling
IMFORT Procedures from C Programs".  To use this binding, compile an object
module cbind.o and then link this with your C program.  It is convenient to
define a foreign task fcc that runs fc and links with cbind.o.  For example, 
put these lines in your login.cl file:

task    $fcc = ("$" // envget("iraf") // "unix/hlib/fc.csh" //
	    " -h $* /u2/sjacoby/iraf/cdir/cbind.o -limfort -lsys -lvops -los")

10-Nov-90
	Fixed a bug in procedures imakwr and impkwr.  They were not 
	compensating for the fact that C performs float->double type
	conversion on arguments across a function call and were putting
	invalid float values in the image header.  (ShJ)

12-Apr-93
	Note there is a typographical error in the Newsletter article 
	mentioned above.  The example given of calling imopen_ should
	pass the string length by value, not reference.  That is:

		imopen_(image, &mode, &im, &ier, &len_image):	WRONG
		imopen_(image, &mode, &im, &ier, len_image);	RIGHT