build system: Further improve quiet mode (Jan Kiszka)

Derived from Stuart Brady's patch: Show the target directory as prefix
to the current module when building in quiet mode. This helps to gain
overview of the current build progress, specifically when running
parallelized builds.

Furthermore, suppress make command echoing when entering subdirs and
replace $(subst subdir-,,$@) with $* in the related rule.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6447 c046a42c-6fe2-441c-8c8c-71466251a162

Makefile

@@ -39,7 +39,7 @@ all: $(TOOLS) $(DOCS) recurse-all
 SUBDIR_RULES=$(patsubst %,subdir-%, $(TARGET_DIRS))
 
 subdir-%:
-	$(MAKE) -C $(subst subdir-,,$@) V="$(V)" all
+	$(call quiet-command,$(MAKE) -C $* V="$(V)" TARGET_DIR="$*/" all,)
 
 $(filter %-softmmu,$(SUBDIR_RULES)): libqemu_common.a
 $(filter %-user,$(SUBDIR_RULES)): libqemu_user.a

rules.mak

 
 %.o: %.c
-	$(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $@")
+	$(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
 
 %.o: %.S
-	$(call quiet-command,$(CC) $(CPPFLAGS) -c -o $@ $<,"  AS    $@")
+	$(call quiet-command,$(CC) $(CPPFLAGS) -c -o $@ $<,"  AS    $(TARGET_DIR)$@")
 
 %.o: %.m
-	$(call quiet-command,$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<,"  OBJC  $@")
+	$(call quiet-command,$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
 
-LINK = $(call quiet-command,$(CC) $(LDFLAGS) -o $@ $^ $(LIBS),"  LINK  $@")
+LINK = $(call quiet-command,$(CC) $(LDFLAGS) -o $@ $^ $(LIBS),"  LINK  $(TARGET_DIR)$@")
 
 %$(EXESUF): %.o
 	$(LINK)
 
 %.a:
-	$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $@")
+	$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
 
-quiet-command = $(if $(V),$1,@echo $2 && $1)
+quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))