The m3 command recognizes files with these extensions.
Arguments that name directories are searched recursively. Any files with recognized suffixes (.i3, .m3, .ic, .mc, .c, .is, .ms, .s, .io, .mo, .o, .a) found in those directories are effectively added to the command line. Any directories containing .i3 files are prepended to the -D search path.
Last modified on Thu Jan 4 11:09:10 PST 1996 by heydon
modified on Thu Apr 21 16:04:27 PDT 1994 by kalsow
modified on Fri Feb 7 00:38:19 PST 1992 by muller
Copyright (C) 1992, 1996, Digital Equipment Corporation. All rights reserved.