Makefile: add dependency on scripts/hxtool

Make sure that the various documentation and C code files are rebuilt
whenever there is a change in the script that splits them out of
.hx files.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Makefile

@@ -169,7 +169,7 @@ all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all modules
 
 config-host.h: config-host.h-timestamp
 config-host.h-timestamp: config-host.mak
-qemu-options.def: $(SRC_PATH)/qemu-options.hx
+qemu-options.def: $(SRC_PATH)/qemu-options.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $@")
 
 SUBDIR_RULES=$(patsubst %,subdir-%, $(TARGET_DIRS))
@@ -241,7 +241,7 @@ qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o libqemuutil.a libqemustub.a
 fsdev/virtfs-proxy-helper$(EXESUF): fsdev/virtfs-proxy-helper.o fsdev/9p-marshal.o fsdev/9p-iov-marshal.o libqemuutil.a libqemustub.a
 fsdev/virtfs-proxy-helper$(EXESUF): LIBS += -lcap
 
-qemu-img-cmds.h: $(SRC_PATH)/qemu-img-cmds.hx
+qemu-img-cmds.h: $(SRC_PATH)/qemu-img-cmds.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $@")
 
 qemu-ga$(EXESUF): LIBS = $(LIBS_QGA)
@@ -524,19 +524,19 @@ TEXIFLAG=$(if $(V),,--quiet)
 %.pdf: %.texi
 	$(call quiet-command,texi2pdf $(TEXIFLAG) -I . $<,"  GEN   $@")
 
-qemu-options.texi: $(SRC_PATH)/qemu-options.hx
+qemu-options.texi: $(SRC_PATH)/qemu-options.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"  GEN   $@")
 
-qemu-monitor.texi: $(SRC_PATH)/hmp-commands.hx
+qemu-monitor.texi: $(SRC_PATH)/hmp-commands.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"  GEN   $@")
 
-qemu-monitor-info.texi: $(SRC_PATH)/hmp-commands-info.hx
+qemu-monitor-info.texi: $(SRC_PATH)/hmp-commands-info.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"  GEN   $@")
 
-qmp-commands.txt: $(SRC_PATH)/qmp-commands.hx
+qmp-commands.txt: $(SRC_PATH)/qmp-commands.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -q < $< > $@,"  GEN   $@")
 
-qemu-img-cmds.texi: $(SRC_PATH)/qemu-img-cmds.hx
+qemu-img-cmds.texi: $(SRC_PATH)/qemu-img-cmds.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"  GEN   $@")
 
 qemu.1: qemu-doc.texi qemu-options.texi qemu-monitor.texi qemu-monitor-info.texi

Makefile.target

@@ -206,13 +206,13 @@ endif
 gdbstub-xml.c: $(TARGET_XML_FILES) $(SRC_PATH)/scripts/feature_to_c.sh
 	$(call quiet-command,rm -f $@ && $(SHELL) $(SRC_PATH)/scripts/feature_to_c.sh $@ $(TARGET_XML_FILES),"  GEN   $(TARGET_DIR)$@")
 
-hmp-commands.h: $(SRC_PATH)/hmp-commands.hx
+hmp-commands.h: $(SRC_PATH)/hmp-commands.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $(TARGET_DIR)$@")
 
-hmp-commands-info.h: $(SRC_PATH)/hmp-commands-info.hx
+hmp-commands-info.h: $(SRC_PATH)/hmp-commands-info.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $(TARGET_DIR)$@")
 
-qmp-commands-old.h: $(SRC_PATH)/qmp-commands.hx
+qmp-commands-old.h: $(SRC_PATH)/qmp-commands.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $(TARGET_DIR)$@")
 
 clean: