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This is about common practices. I have a git repository containing the linux kernel. Now I want to build this linux kernel. Should I copy the sources outside the git repository and then build the kernel ? Or, should I run the build inside the git repository itself? My concern is about the many files that are created during a build process that should, I think, be not included in the git repository.

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It's okay to compile in the repository itself. New files are ignored by Git until you add them manually for the first time. (You can use make mrproper or git clean -dfx to get rid of compilation output.)

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can't I do a make clean ? is that the same as make mrproper ? –  AnkurVj Aug 26 '11 at 8:28
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@AnkurVj: make clean usually cleans just the compilation output (object files). make distclean removes everything that shouldn't be included in published tarballs of the source code. make mrproper is specific to Linux source and is something in-between: more aggressive than make clean but less so than make distclean. See Makefile lines 1148 and below. –  grawity Aug 26 '11 at 8:43

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