On Apr 18, 2005, at 11:16 AM, David Catmull wrote:
I've been working on converting our CodeWarrior application and
library projects to XCode, and have finally come to the conclusion
that we have to use targets instead of build styles. It was a
reluctant decision because we're just doing debug/final builds, and
that's what build styles are supposed to be for, but build styles
don't work the way we need them to.
[...]
I agree that these are annoying problems, they certainly aren't
insurmountable. For OmniOutliner 3 we have the following build styles
(the normal one's are for the Pro version)
- Development
- Deployment
- Development (Standard)
- Deployment (Standard)
All the targets are shared. We add all files that might be copied
into either project into the shared target.
The 'Pro' styles add '-DOO3_PRO' to OTHER_CFLAGS. We can turn off
entire files using this, or just small pieces. If we had libraries
that were only linked by Pro, we could add those to OTHER_LDFLAGS (but
we don't -- ymmv).
The last bit is a Shell Script build phase that is the last thing in
the main app's target (i.e., after the link & resource phases). It
checks the name of the build style and then trims stuff out of the
built bundle that doesn't belong in that version of the app. Finally,
it uses rsync to copy the app to the appropriate name for the build
style.
So, yeah, this is less than ideal, but it is *way* better than having
to ensure that you remembered to add all the right files to two
different targets. With our approach, it is very, very easy to see the
differences between the two build styles (look at the shell script and
search for the #ifdefs). If you are maintaining two targets, you can
easily forget to add a file to one side and then spend a while tracking
it down (more of an issue if you are using a dynamically bound language
like ObjC than C++, obviously :)
-tim
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