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+$! generates options file for vms link
+$! p1 is filename and mode to open file (filename/write or filename/append)
+$! p2 is delimiter separating elements of list in p3
+$! p3 is list of items to be written, one per line, into options file
+$
+$ open file 'p1'
+$ element=0
+$loop:
+$ x=f$element(element,p2,p3)
+$ if x .eqs. p2 then goto out
+$ y=f$edit(x,"COLLAPSE") ! lose spaces
+$ if y .nes. "" then write file y
+$ element=element+1
+$ goto loop
+$
+$out:
+$ close file
+$ exit