Building Cocoa Applications: A Step by Step Guide

Making Evaluator a MathPaper Auxiliary Executable

In the previous chapter, we created and tested Evaluator in a Unix shell. Now we want to add the Evaluator source files (grammar.y and rules.l ) to the MathPaper project and create a second target, so that the MathPaper project can create both the front end and the back end of the MathPaper application. We’ll name this second target “Evaluator”, and we’ll make the MathPaper target dependent on the Evaluator target, which will result in the Evaluator target’s being built before the MathPaper target is built. We’ll also set up the MathPaper target so that the Evaluator executable is automatically copied into the MathPaper application wrapper as an auxiliary executable.

What a lot of work! Until now, the MathPaper application itself has been the only target. Let’s get started on the modifications that we need.

1. Open MathPaper.pbproj in Project Builder.

2. Choose Project → New Target, and a new sheet will drop down in PB’s main window.

3. Scroll to the bottom of the new sheet and select Tool, as shown in Figure 11-1.

Figure 11-1. Selecting a new target for MathPaper

1. Click the Next button and a second new sheet will drop down, prompting for the name of the new target.

2. Enter “Evaluator” in the Target Name field in this second drop-down sheet, as shown in Figure 11-2. Select MathPaper as the project to which to add the new target.

Figure 11-2. Giving ...