changing Makefile system a bit, again

git-svn-id: svn://anubis/hos/trunk@19 5b3e749e-e535-0410-8002-a9bb6afbdfca

kernel/Makefile

@@ -1,12 +1,10 @@
 
-KERNEL  := hos
-LDFLAGS := -T link.ld
-
 export PLATFORM := $(shell if [[ `uname` =~ "CYGWIN" ]]; then \
                              echo cygwin; \
                            else \
                              echo unix; \
                            fi)
+
 ifeq ($(PLATFORM), cygwin)
 export LD       := i586-elf-ld
 export CC       := i586-elf-gcc
@@ -18,6 +16,16 @@ export CXX     := g++
 endif
 export NASM     := nasm
 
+WD              := $(shell pwd)
+LDSCRIPT        := link.ld
+KERNEL          := hos
+export CPPFLAGS := -I$(WD)/include
+export CFLAGS   := -Wall -O2
+export CXXFLAGS := -Wall -O2
+export LDFLAGS  := -T $(LDSCRIPT)
+
+SUBDIRS         := boot
+SUBDIRS_clean   := $(subdirs:%=%.clean)
 
 .PHONY: all
 all: $(KERNEL).gz
@@ -25,12 +33,16 @@ all: $(KERNEL).gz
 $(KERNEL).gz: $(KERNEL)
 	gzip -c $< > $@
 
-$(KERNEL): boot.o
-	$(LD) $(LDFLAGS) -o $@ $<
+$(KERNEL): $(SUBDIRS)
+	$(LD) $(LDFLAGS) -o $@ $(SUBDIRS:%=%/%.o)
 
-boot.o: boot.asm
-	$(NASM) -f elf -o $@ $<
+.PHONY: $(SUBDIRS)
+$(SUBDIRS):
+	$(MAKE) -C $@
 
 .PHONY: clean
-clean:
-	-rm -f *~ $(KERNEL) $(KERNEL).gz *.o
+clean: $(SUBDIRS_clean)
+	-rm -f *~ $(KERNEL) $(KERNEL).gz
+
+%.clean:
+	$(MAKE) -C $* clean clean=1

kernel/subdir.mak

@@ -0,0 +1,33 @@
+
+ASMOBJS         := $(patsubst %.asm,%.o,$(wildcard *.asm))
+COBJS           := $(patsubst %.c,%.o,$(wildcard *.c))
+CXXOBJS         := $(patsubst %.cc,%.o,$(wildcard *.cc))
+CDEPS           := $(COBJS:.o=.dep)
+CXXDEPS         := $(CXXOBJS:.o=.dep)
+
+all: $(SUBDIR).o
+
+$(SUBDIR).o: $(ASMOBJS) $(COBJS) $(CXXOBJS)
+	$(LD) -r -o $@ $^
+
+%.o: %.asm
+	$(NASM) -f elf -o $@ $<
+
+%.o: %.c
+	$(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $<
+
+%.o: %.cc
+	$(CXX) -c -o $@ $(CPPFLAGS) $(CXXFLAGS) $<
+
+# Make dependency files
+%.dep: %.c
+	@set -e; rm -f $@; \
+	  $(CC) -MM $(CPPFLAGS) $< | sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@
+
+clean:
+	-rm -f *.o *.dep *~
+
+# Include dependency files
+ifndef clean
+-include $(DEPS)
+endif