Makefiles

The Lightfoot SDK provides a set of Makefile templates that make building applications very easy. The majority of Lightfoot makefiles are only 4 lines long, the templates providing all the rules for building the application.

General makefile

All makefiles must include the main template makefile, lfmake.mk

include $(LF_HOME)/inc/lfmake.mk

Java application makefile

The following variables control the building of Java applications.

`jmain`	The name of the main class for the application
`project`	The name of the project. This controls the name of the produced files.
`jfiles`	The name of other classes to build
`java_libs`	The names of java libraries to include
`java_platform`	The name of the Java platform to use. This defaults to `dct_cldc`, but can be changed to `dct_cldc_no_float` to remove floating point support.
`cfiles`	The names of all C files to build
`asmfiles`	The names of all ASM files to build
`JAVA_NATIVE`	Set to 1 to build native method stubs in the `native` subdirectory.

The following line must be added to the end of your makefile to build the java application.



include $(MAKEJAVA)

C application makefile

The following variables control the building of C applications.

`cfiles`	The names of all the C files to build
`asmfiles`	The names of all the ASM files to build
`project`	The name of the project. This controls the name of the produced files.
`libs`	The names of libraries to link with.

The following line must be added to the end of your makefile to build the C application.



include $(MAKEPROG)

Library makefile

The following variables control the building of libraries.

`cfiles`	The names of all the C files to build
`asmfiles`	The names of all the ASM files to build
`jfiles`	The names of all the Java files to build
`java_dir`	The directory where Java files can be found.
`project`	The name of the project. This controls the name of the produced library
`JAVA_NATIVE`	Set to 1 to build native method stubs in the `native` subdirectory.

The following line must be added to the end of your makefile to build the library.



include $(MAKELIB)

Make process

The make process consists of many steps as described below.

The application is configured for the required BSP
Any Java source files are compiled into class files.
All the required class files are converted into assembler files.
All the required C files are compiled to assembler files.
All the assembler files are assembled into object files.
The object files to be put into a library are added to the library. This is the last stage of a library build.
The linker takes all the produced object files, system object files, system libraries and BSP libraries and produces an absolute file.
The object dumper converts the absolute file into a binary file for downloading to the board, or a raw memory image file for storing in FLASH or ROM