BSP and Device Driver Development Guide
The Directory class of Makefiles directs the build process through
a set of subdirectories in a particular order. This order is usually
chosen to insure that build dependencies are properly processed.
Most BSPs only have one Directory class Makefile. The Makefile.am
in the BSP root directory (c/src/lib/libbsp/CPU/BSP) specifies
following Makefile fragment shows how a BSP would specify the
directories to be built and their order:
SUB_DIRS=include start340 startup clock console timer \
network wrapup
BSP and Device Driver Development Guide
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