[gs-devel] debugging ghostscript in xcode

[Ralph Giles]

Tim,

Last week you asked about debugging gs from xcode. I got it to work 
again, sort of. Here's a somewhat minimal recipe.

1. Start xcode and open a new project
2. Choose the "Empty Project" template
3. Enter a Project Name like "gs"
4. Set the Project Directory to the top level of your gs source tree
5. Select Project:New Target...
6. Choose the "External Target" template
7. Set Target Name to something like "gs"
8. Double-click on the "gs" target to open its info panel
9. HACK: add 'debug' to the end of the arguments string.
8. Click on the Build button.
   The status bar should now say "Running external build tool..."
   and the warning count will slowly build.
9. Select Project:New Custom Executable...
10. Set Executable Name to "gs-debug"
11. Set Executable Path to "debugobj/gs"
12. In the executable's info panel, Set the working directory to 
    Project directory
13. Open the debugger and click on the "Debug" or "Build and Debug"
    button. It should launch. If you hit "Pause" once the program is
    running it should break and let you debug. It seems smart enough
    to find the source without explicitly adding the files to the
    project.

Issues:

* I haven't figured out how to get at the command line interface, but 
  you can pass arguments in the Executable's info panel, which is enough 
  to debug a file.
* Fix-and-continue, etc. don't work with external targets.
* We should be passing the 'debug' make target through $(ACTION) instead 
  of hacking it onto the external target's arguments list, so the Clean 
  button, and the Build button under the Release config work properly.
* Docs suggest you can add a Debugger() call to trigger a breakpoint
  at a specific execution point, but I didn't try that. Might require
  adding a library to the link line.

Hope that's of some help,
 -r