Graphics Programs Reference
In-Depth Information
Each target and project has multiple
build configurations
. A build configuration is a set of
build settings. When you create a project, there are two build configurations: debug and
release. The build settings for the debug configuration make it easier to debug your ap-
plication, while the release settings turn on optimizations to speed up execution.
Let's take a look at the build settings and configurations for
TouchTracker
. Select the pro-
ject from the project navigator and the
TouchTracker
project in the editor area. Then, se-
lect
Info
from the tabs on top of the editor area (
Figure 21.26
).
Figure 21.26 Build configurations list
The
Configurations
section shows you the available build configurations in the project
and targets. You can add and remove build configurations with the buttons at the bottom
of this section.
When performing a scheme action, the scheme will use one of these configurations when
building its targets. You can specify the build configuration that the scheme uses in the
scheme editor in the option for
Build Configuration
in the
Info
pane.
Enough talk - time to do something useful. Let's change the value of the target build set-
ting
Preprocessor Macros
. Preprocessor macros allow you to compile code conditionally.
They are either defined or not defined at the start of a build. If you wrap a block of code in
a preprocessor directive, it will only be compiled if that macro has been defined. The
Pre-
processor Macros
setting lists preprocessor macros that are defined when a certain build
configuration is used by a scheme to build a target.
Select the
TouchTracker
target, and in its
Build Settings
pane, search for the
Preprocessor
Macros
build setting. Double-click on the value column for the
Debug
configuration un-
der
Preprocessor Macros
. In the table that appears, add a new item:
VIEW_DEBUG
, as
shown in
Figure 21.27
.
Figure 21.27 Changing a build setting
