pc-bios/s390-ccw: do not use rules.mak

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

pc-bios/s390-ccw/Makefile

@@ -3,10 +3,26 @@ all: build-all
 	@true
 
 include ../../config-host.mak
-include $(SRC_PATH)/rules.mak
 
+quiet-command = $(if $(V),$1,$(if $(2),@printf "  %-7s %s\n" $2 $3 && $1, @$1))
+cc-option = $(if $(shell $(CC) $1 -S -o /dev/null -xc /dev/null > /dev/null \
+	      2>&1 && echo OK), $1, $2)
+
+VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.sh %.rc Kconfig% %.json.in
+set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
 $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
 
+# Flags for dependency generation
+QEMU_DGFLAGS = -MMD -MP -MT $@ -MF $(@D)/$(*F).d
+
+%.o: %.c
+	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
+	       -c -o $@ $<,"CC","$(TARGET_DIR)$@")
+
+%.o: %.S
+	$(call quiet-command,$(CCAS) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
+	       -c -o $@ $<,"CCAS","$(TARGET_DIR)$@")
+
 .PHONY : all clean build-all
 
 OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \