# Aedrix root Makefile # Copyright (C) 2012, Aaron Lindsay # Config options for the code itself (should be separated from the Makefile sometime) ARCH = arm # Config options concerning the build process itself VERBOSE ?= 0 # 1 shows all compiler flags, 0 shows cleaner output V = $(if $(VERBOSE:1=),@) # Use this to prefix commands that should only be shown when VERBOSE==1 # Define the tools to be used TOOL_PREFIX = arm-elf- AS = $(TOOL_PREFIX)as CC = $(TOOL_PREFIX)gcc LD = $(TOOL_PREFIX)ld OBJCOPY = $(TOOL_PREFIX)objcopy OBJDUMP = $(TOOL_PREFIX)objdump # Define the flags we'll need for our tools INCLUDES = -I include KCFLAGS = -g -Wall -Wextra -Werror -nostdlib -nostartfiles -fno-builtin -std=gnu99 -include config.h $(INCLUDES) KLDFLAGS = -T link.ld -L /usr/lib/gcc/arm-elf/4.7.0/ EXTRA_LIBS = -lgcc # Include the config file so we don't compile/link unnecessary objects include config # Define KOBJS as a 'simply expanded' variable KOBJS := # Initialize sub-directory Makefile inclusion BASEDIR = $(shell pwd) SUBDIRS := boot kernel devices ifneq (,$(SUBDIRS)) include $(patsubst %,%/kernel.mk,$(SUBDIRS)) endif .PHONY: all clean boot boot-gdb all: aedrix-kernel.img aedrix-kernel.elf aedrix-kernel.elf: $(KOBJS) @echo ' LD $@' $(V)$(LD) $(KLDFLAGS) -o $@ $(KOBJS) $(EXTRA_LIBS) aedrix-kernel.objdump: aedrix-kernel.elf @echo 'OBJDUMP $@' $(V)$(OBJDUMP) -D $< > $@ aedrix-kernel.img: aedrix-kernel.elf @echo 'OBJCOPY $@' $(V)$(OBJCOPY) $< -O binary $@ %.o: %.c config.h @echo ' CC $@' $(V)$(CC) $(KCFLAGS) -MD -c -o $@ $< @# Automatic dependency generation fixups (http://mad-scientist.net/make/autodep.html) @cp $*.d $(*D)/.$(*F).d; \ sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \ -e '/^$$/ d' -e 's/$$/ :/' < $*.d >> $(*D)/.$(*F).d; \ rm -f $*.d %.o: %.S config.h @echo ' AS $@' $(V)$(CC) $(KCFLAGS) -MD -c -o $@ $< @# Automatic dependency generation fixups (http://mad-scientist.net/make/autodep.html) @cp $*.d $(*D)/.$(*F).d; \ sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \ -e '/^$$/ d' -e 's/$$/ :/' < $*.d >> $(*D)/.$(*F).d; \ rm -f $*.d config.h: config @# Generate config header file from make-style include @echo ' CONFIG config.h' @cp config config.h @sed -i '/^\s*#/d' config.h @sed -i 's/#.*$$//g' config.h @sed -i '/^\s*\(CONFIG_[A-Z0-9_]\+\)\s*=\s*[nN]/d' config.h @sed -i 's/^\s*\(CONFIG_[A-Z0-9_]\+\)\s*=\s*[yY]/#define \1/g' config.h clean: @echo ' CLEAN config.h' $(V)rm -f config.h @echo ' CLEAN *.o' $(V)rm -f $(KOBJS) @echo ' CLEAN .*.d' $(V)rm -f $(DEPENDENCY_FILES) @echo ' CLEAN aedrix-kernel.elf' $(V)rm -f aedrix-kernel.elf @echo ' CLEAN aedrix-kernel.objdump' $(V)rm -f aedrix-kernel.objdump @echo ' CLEAN aedrix-kernel.img' $(V)rm -f aedrix-kernel.img boot: aedrix-kernel.img $(V)qemu-system-arm -m 1024 -M vexpress-a9 -kernel aedrix-kernel.img -serial stdio boot-gdb: aedrix-kernel.img $(V)qemu-system-arm -m 1024 -M vexpress-a9 -kernel aedrix-kernel.img -serial stdio -S -s DEPENDENCY_FILES = $(foreach file,$(KOBJS), $(dir $(file)).$(notdir $(basename $(file))).d) -include $(DEPENDENCY_FILES)