Книга: Embedded Linux Primer: A Practical, Real-World Approach

4.2.5. Subdirectory Layout

4.2.5. Subdirectory Layout

Now that you've seen how the build system controls the kernel image, let's take a look at a representative kernel subdirectory. Listing 4-4 details the contents of the mach-ixp425 subdirectory. This directory exists under the .../arch/arm architecture-specific branch of the source tree.

Listing 4-4. Kernel Subdirectory

$ ls -l linux-2.6/arch/arm/mach-ixp425
total 92
-rw-rw-r-- 1 chris chris 11892 Oct 10 14:53 built-in.o
-rw-rw-r-- 1 chris chris 6924 Sep 29 15:39 common.c
-rw-rw-r-- 1 chris chris 3525 Oct 10 14:53 common.o
-rw-rw-r-- 1 chris chris 13062 Sep 29 15:39 common-pci.c
-rw-rw-r-- 1 chris chris 7504 Oct 10 14:53 common-pci.o
-rw-rw-r-- 1 chris chris 1728 Sep 29 15:39 coyote-pci.c
-rw-rw-r-- 1 chris chris 1572 Oct 10 14:53 coyote-pci.o
-rw-rw-r-- 1 chris chris 2118 Sep 29 15:39 coyote-setup.c
-rw-rw-r-- 1 chris chris 2180 Oct 10 14:53 coyote-setup.o
-rw-rw-r-- 1 chris chris 2042 Sep 29 15:39 ixdp425-pci.c
-rw-rw-r-- 1 chris chris 3656 Sep 29 15:39 ixdp425-setup.c
-rw-rw-r-- 1 chris chris 2761 Sep 29 15:39 Kconfig
-rw-rw-r-- 1 chris chris 259 Sep 29 15:39 Makefile
-rw-rw-r-- 1 chris chris 3102 Sep 29 15:39 prpmc1100-pci.c

The directory contents in Listing 4-4 have common components found in many kernel source subdirectories: Makefile and Kconfig. These two files drive the kernel configuration-and-build process. Let's look at how that works.

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