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Editorial Team
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Asked: 2026-05-11T23:31:51+00:00

I’m building a custom Ubuntu kernel and have modified one of the source files.

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I’m building a custom Ubuntu kernel and have modified one of the source files. When I issue the build command:

NOEXTRAS=1 skipabi=true skipmodule=true fakeroot debian/rules binary-insp8600

it rebuilds the debs, but none of the modified source files are rebuilt.

What’s up? Do I have to do a completely clean rebuild every time I modify a source file?

That doesn’t make any sense.

The file modified was ./init/main.c.

As a note binary-insp8600 is a custom flavor I created for my Inspiron 8600 laptop.

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1 Answer

  1. Editorial Team

    debian/rules is not the kernel Makefile. It has no way of knowing the file you edited is a dependency of the final kernel, since these dependencies are in the real Makefile.

    In fact, I would expect the debian/rules build target (the one which actually does the compilation) to depend only on a “flag” file it creates after finishing the build. If that is the case, a simple workaround would be to remove that “flag” file; it would then compile everything again (by calling the kernel’s Makefile, which would know how to do a partial rebuild. Of course, that’s assuming the build target does not try to be tidy and do a make clean or equivalent…)

    (I did not look at the debian/rules for the package you are using, so I might be wrong, but at least it is a start.)

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