------------------------------------------------------------------------------- README ------------------------------------------------------------------------------- This directory contains makefile modular support files, that can be used in your project. Each module is packaged with two inclusion makefiles, <module>-config.mk and <module>-rules.mk. The first one defines some new variables for the make, or appends values to the existing variables for the make. The second defines rules for support building. So in your project, the <module>-config.mk should be included at some place, where you are defining variables (near the beginning of the file), and file <module>-rules.mk should be included in the rules part of makefile (somewhere near to the end of file). Example makefile using gcc compiler module: >>>>>> OBJS += foo.o bar.o CFLAGS += -O0 -g CPPFLAGS += -MD -MP $(@F).d CPPFLAGS += $(DEFS) CPPFLAGS += $(INCS) LDFLAGS += --static --nostartfiles LDLIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group # parameters for gcc module PREFIX = arm-elf include $(OPENCM3_DIR)/mk/gcc-config.mk .PHONY: clean all all: binary.images %.images: %.elf %.hex include $(OPENCM3_DIR)/mk/gcc-rules.mk clean: $(Q)$(RM) -rf binary.* *.o *.d -include $(OBJS:.o=.d) <<<<<< MODULES ======= ------------------------------------------------------------------------------- gcc ------------------------------------------------------------------------------- This module adds an extended support for GCC toolchain. This adds rules, neccessary for compiling C and C++ files into elf binary, and rules for generation of bin, hex, or srec output files for flashing. Variables to control the build process (should be set in your makefile): ------------------------------------------------------------------------ CFLAGS C compiler flags CXXFLAGS C++ compiler flags CPPFLAGS C preprocessor flags (used for C and for C++ compiler) LDFLAGS Linker flags ARCH_FLAGS Architecture specification flags (-mcpu, -march etc ) Variables to tell gcc about project dependencies and input files ---------------------------------------------------------------- LDSCRIPT Linker script file name (can be generated or fixed) LIBDEPS Array of library filenames that shoud be rebuilt if needed LDLIBS Array of libraries to be linked with (array of -l<libname>) OBJS Array of object files to be built