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HowTo use the CDT to navigate Linux kernel source

Revision as of 18:09, 19 February 2010 by (Talk | contribs) (Added comment about getting the correct kernel source before indexing it.)

Here are some steps that I've found to get the CDT to work well with the Linux kernel source. If you exclude some of these steps, it may still work to a large degree, but some things may not work exactly right; for example it may find the wrong include file for a C file.

Anyway, as you do these steps, I think you may understand how they assist the indexer to do a good job for the Linux kernel source.

Disclaimer: these steps were developed for Eclipse 3.5.1 + CDT 6.0.0.

  1. Download and install Eclipse plus the CDT.
  2. Configure and build your kernel. This can be done before or after downloading and installing Eclipse.
  3. Ensure that you have the right kernel source (e.g. make sure you are on the right git branch). If you check out another branch later, that's ok, but you will need to re-index the source, and that takes about 20 minutes.
  4. Start up Eclipse.
  5. Click File->New->C Project
  6. Fill in a project name like my_kernel
  7. Uncheck the Use default location box and type in the root directory of your kernel into the Location box.
  8. In the Project type: pane, click the Makefile project and select Empty Project
  9. On the right side, select Linux GCC
  10. Click Advanced settings... and a Properties dialog will pop up.
  11. Select Resource on the left, and then in the Text file encoding section, select Other and ISO-8859-1 in the box, then click Apply
  12. Select C/C++ Build on the left.
  13. Open the C/C++ General selection on the left.
  14. Click on Indexer
  15. Checkmark the Enable project specific setttings box.
  16. Uncheck Index source files not included in the build
  17. Clear out the Files to index up-front box.
  18. Click on Paths and Symbols on the left.
  19. Select the Includes tab and then select GNU C
  20. Click Add...
  21. Click Workspace... then select your kernel's include directory
  22. Do another Add, Workspace and add arch/architecture/include, e.g., arch/powerpc/include
  23. Click the # Symbols tab
  24. Click Add...
  25. Set the name to __KERNEL__
  26. Set the value to 1 and click OK
  27. Click the Source Location tab
  28. Click the twisty for your project.
  29. Select the Filter item and click Edit Filter...
  30. Click Add Multiple... and then select all of the arch/* directories in your kernel source that will not be used (i.e. all the ones that are not for the architecture you are using)
  31. Click OK and OK again to dismiss that dialog.
  32. Click OK on the Properties dialog.
  33. Click Finish on the C Project dialog.
  34. Right click on the project and select Index then select Rebuild
  35. It will take about 20 minutes or so to complete.

Corey Ashford

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