BSP and Device Driver Development Guide
RTEMS uses the GNU automake and GNU autoconf automatic
configuration package. Consequently, there are a number of
automatically generated files in each directory in the RTEMS
source tree. The bootstrap script found in the top level
directory of the RTEMS source tree is executed to produce the
automatically generated files. That script must be run from
a directory with a configure.ac file in it.
There is a file named Makefile.am in each directory of a BSP.
This file is used by automake to produce the file
named Makefile.in which is also found in each directory of a BSP.
The configure process specializes the Makefile.in files at
the time that RTEMS
is configured for a specific development host and target. Makefiles
are automatically generated from the Makefile.in files. It is
necessary for the BSP developer to provide the Makefile.am
files and generate the Makefile.in files. Most of the
time, it is possible to copy the Makefile.am from another
similar directory and edit it.
The Makefile files generated are processed when configuring
and building RTEMS for a given BSP.
The BSP developer is responsible for generating Makefile.am
files which properly build all the files associated with their BSP.
There are generally three types of Makefiles in a BSP source tree:
BSP and Device Driver Development Guide
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