28.8. Watch SCons prepare targets for building: the `--debug=prepare` Option
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## 28.8. Watch SCons prepare targets for building: the `--debug=prepare` Option

Sometimes SCons doesn't build the target you want, and it's difficult to figure out why. You can use the `--debug=prepare` option to see all the targets SCons is considering, and whether they are already up-to-date or not. The message is printed before SCons decides whether to build the target.

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28.7. How is SCons Making Its Decisions? the `--taskmastertrace` Option | Home | 28.9. Why is a file disappearing? the `--debug=duplicate` Option