build: Move tracing objects into libuser on usermode emulation targets

This will apply libuser-specific compilation flags (like the ones added by
--enable-user-pie), but keep softmmu emulation targets "as-is".

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Makefile.objs

@@ -177,6 +177,7 @@ user-obj-y =
 user-obj-y += envlist.o path.o
 user-obj-y += tcg-runtime.o host-utils.o
 user-obj-y += cutils.o cache-utils.o
+user-obj-y += $(trace-obj-y)
 
 ######################################################################
 # libhw
@@ -340,12 +341,12 @@ trace.h: trace.h-timestamp trace-dtrace.h
 else
 trace.h: trace.h-timestamp
 endif
-trace.h-timestamp: $(SRC_PATH)/trace-events config-host.mak
+trace.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
 	$(call quiet-command,sh $(SRC_PATH)/scripts/tracetool --$(TRACE_BACKEND) -h < $< > $@,"  GEN   trace.h")
 	@cmp -s $@ trace.h || cp $@ trace.h
 
 trace.c: trace.c-timestamp
-trace.c-timestamp: $(SRC_PATH)/trace-events config-host.mak
+trace.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
 	$(call quiet-command,sh $(SRC_PATH)/scripts/tracetool --$(TRACE_BACKEND) -c < $< > $@,"  GEN   trace.c")
 	@cmp -s $@ trace.c || cp $@ trace.c
 
@@ -358,7 +359,7 @@ trace-dtrace.h: trace-dtrace.dtrace
 # but that gets picked up by QEMU's Makefile as an external dependency
 # rule file. So we use '.dtrace' instead
 trace-dtrace.dtrace: trace-dtrace.dtrace-timestamp
-trace-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events config-host.mak
+trace-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
 	$(call quiet-command,sh $(SRC_PATH)/scripts/tracetool --$(TRACE_BACKEND) -d < $< > $@,"  GEN   trace-dtrace.dtrace")
 	@cmp -s $@ trace-dtrace.dtrace || cp $@ trace-dtrace.dtrace
 

Makefile.target

@@ -383,6 +383,7 @@ obj-y += $(addprefix ../, $(common-obj-y))
 obj-y += $(addprefix ../libdis/, $(libdis-y))
 obj-y += $(libobj-y)
 obj-y += $(addprefix $(HWDIR)/, $(hw-obj-y))
+obj-y += $(addprefix ../, $(trace-obj-y))
 
 endif # CONFIG_SOFTMMU
 
@@ -394,7 +395,6 @@ obj-$(CONFIG_SMARTCARD_NSS) += $(addprefix ../libcacard/, $(libcacard-y))
 endif # CONFIG_BSD_USER
 endif # CONFIG_LINUX_USER
 
-obj-y += $(addprefix ../, $(trace-obj-y))
 obj-$(CONFIG_GDBSTUB_XML) += gdbstub-xml.o
 
 $(QEMU_PROG): $(obj-y) $(obj-$(TARGET_BASE_ARCH)-y)

Makefile.user

@@ -17,7 +17,9 @@ all: $(user-obj-y)
 	@true
 
 clean:
-	rm -f *.o *.d *.a *~
+	for d in . trace; do \
+	rm -f $$d/*.o $$d/*.d $$d/*.a $$d/*~; \
+	done
 
 # Include automatically generated dependency files
 -include $(wildcard *.d */*.d)

configure

@@ -3669,6 +3669,7 @@ fi
 
 d=libuser
 mkdir -p $d
+mkdir -p $d/trace
 symlink $source_path/Makefile.user $d/Makefile
 if test "$static" = "no" -a "$user_pie" = "yes" ; then
   echo "QEMU_CFLAGS+=-fpie" > $d/config.mak