
\Su3b5\S:  Example

               if u3b5
                  then cc -Du3b5 format.c -o format.o
               elif pdp11
                  then cc -Dpdp11 format.c -o format.o
               fi

    This shell program compiles the program in the file "format.c".  It
    puts the compiled version in "format.o".  The program checks if the
    computer is an AT&T 3B5 computer or pdp-11/70 or pdp-11/45.  If the
    machine is a 3B5, the first compile command compiles "format.c".  The
    "Du3b5" option to cc(1) causes only the machine-dependent lines that
    pertain to the 3B5 to be executed so that "format.o" is correct for the
    machine it is compiled on.

