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The Plus (+) Construction
The + construction specifies that the files to the right of the plus
sign are combined with the first file you specified. Therefore, all
files you specify become one file in the compilation and not separate
This construction is useful when the first file is a subroutine of the
other files you specified.
When you use the + construction, the compiler produces a single
relocatable binary file from a collection of input source files. To
construct a single program from several input files, you can name one
input file FIRST.MAC, another MIDDLE.MAC, and a third LAST.MAC. You
can then specify the following command line:
After this, the compiler produces one binary file named LAST from the
three source files, FIRST, MIDDLE, and LAST. This construction allows
you to use one input file as part of several different compilations.
For example, you could later use the FIRST.MAC file with SECOND.MAC
and THIRD.MAC to obtain a different binary file. The + construction
permits you to maintain material in a single file that is common to
more than one compilation.
The compiler gives the name of the last input file in the string to
any output file (for example, .REL, .CRF, .LST). Therefore, in the
previous examples, the output files would be called LAST and THIRD,
respectively. Note that you can include device names, extensions, and
project-programmer numbers in any + construction. Therefore, the
following is a valid command string: