#
# Common makefile targets.
#
# Define these variables (if desired) in directory makefiles:
#	DIRS_NEEDED
#	INSTALLDIR
#	SRCROOT
#
ifneq "" "$(wildcard /bin/mkdirs)"
  MKDIRS = /bin/mkdirs
else
  MKDIRS = /bin/mkdir -p
endif

# Toggle this as to whether you want a frame pointer (%ebp) to be used. It is
# invaluable for debugging the booter. For example using GDB attached to VMware.
# In fact, it's so invaluable that it's now the default.  Not only that but the
# compiler seems to generate slightly smaller code and the real<->prot code
# clearly handles it appropriately so I have no idea why Apple omitted it.
#OMIT_FRAME_POINTER_CFLAG=-fomit-frame-pointer
OMIT_FRAME_POINTER_CFLAG=
HAVE_MD = YES

##CC = clang
##CC = llvm-gcc
##CC = gcc

installsrc:: $(SRCROOT)
	cp $(ALLSRC) $(SRCROOT)
	cd $(SRCROOT); chmod a-w $(ALLSRC)

install:: installhdrs
	@if [ -z "$(RC_ARCHS)" -o -n "$(RC_i386)" ]; then 	\
		$(MAKE) install_i386 OBJROOT=${OBJROOT}		\
			SYMROOT=${SYMROOT} DSTROOT=${DSTROOT}	\
			SRCROOT=${SRCROOT}; 			\
	else							\
		echo i386 not selected - null build.;		\
	fi

install_i386:: all

installhdrs::

.SUFFIXES: .s .i .c .o

ifeq ($(HAVE_MD),YES)

.c.o .m.o:
	$(CC) $(CPPFLAGS) $(GFLAGS) $(CFLAGS) $(DEFINES) -c $(INC) -Wmissing-prototypes -Wmissing-declarations $< -o $(OBJROOT)/$*.o -MD -dependency-file $(OBJROOT)/$*.d
	$(SYMROOT)/md -u $(OBJROOT)/Makedep -f -d $(OBJROOT)/$*.d

$(OBJROOT)/%.o: %.c
	$(CC) $(CPPFLAGS) $(GFLAGS) $(CFLAGS) $(DEFINES) -c $(INC) -Wmissing-prototypes -Wmissing-declarations $< -o $(OBJROOT)/$*.o -MD -dependency-file $(OBJROOT)/$*.d
	$(SYMROOT)/md -u $(OBJROOT)/Makedep -f -d $(OBJROOT)/$*.d 

$(OBJROOT)/%.o: %.m
	$(CC) $(CPPFLAGS) $(GFLAGS) $(CFLAGS) $(DEFINES) -c $(INC) $< -o $(OBJROOT)/$*.o -MD -dependency-file $(OBJROOT)/$*.d
	$(SYMROOT)/md -u $(OBJROOT)/Makedep -f -d $(OBJROOT)/$*.d

else

.c.o .m.o:
	$(CC) $(CPPFLAGS) $(GFLAGS) $(CFLAGS) $(DEFINES) -c $(INC) $< -o $(OBJROOT)/$*.o 

$(OBJROOT)/%.o: %.c
	$(CC) $(CPPFLAGS) $(GFLAGS) $(CFLAGS) $(DEFINES) -c $(INC) $< -o $(OBJROOT)/$*.o 

$(OBJROOT)/%.o: %.m
	$(CC) $(CPPFLAGS) $(GFLAGS) $(CFLAGS) $(DEFINES) -c $(INC) $< -o $(OBJROOT)/$*.o 
    
endif


# Use GCC or LLVM-GCC for assembly files 
.s.o:
	gcc $(CPPFLAGS) $(GFLAGS) -c $(INC) -arch i386 -o $(OBJROOT)/$(@F) $<

boot2.o:
	gcc $(CPPFLAGS)$(GFLAGS) -Wa,-n -c $(INC) -arch i386 -o $(OBJROOT)/$(@F) boot2.s
	
$(OBJROOT)/%.o: %.s
	gcc $(CPPFLAGS) $(GFLAGS) -c $(INC) -arch i386 -o $(OBJROOT)/$(@F) $<

$(DIRS_NEEDED) $(INSTALLDIR) $(SRCROOT):
	$(MKDIRS) $@