kbuild: Indicate building modules in non-verbose mode

When using the abbreviated (non-verbose) output, show [M] when
building modules.

(Peter Samuelson)

scripts/Makefile.build

@@ -53,12 +53,20 @@ __build: $(if $(KBUILD_BUILTIN),$(O_TARGET) $(L_TARGET) $(EXTRA_TARGETS)) \
 
 # Default is built-in, unless we know otherwise
 modkern_cflags := $(CFLAGS_KERNEL)
+quiet_modtag := $(empty)   $(empty)
 
 $(real-objs-m)        : modkern_cflags := $(CFLAGS_MODULE)
 $(real-objs-m:.o=.i)  : modkern_cflags := $(CFLAGS_MODULE)
 $(real-objs-m:.o=.s)  : modkern_cflags := $(CFLAGS_MODULE)
 $(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE)
 
+$(real-objs-m)        : quiet_modtag := [M]
+$(real-objs-m:.o=.i)  : quiet_modtag := [M]
+$(real-objs-m:.o=.s)  : quiet_modtag := [M]
+$(real-objs-m:.o=.lst): quiet_modtag := [M]
+
+$(obj-m)              : quiet_modtag := [M]
+
 $(export-objs)        : export_flags   := $(EXPORT_FLAGS)
 $(export-objs:.o=.i)  : export_flags   := $(EXPORT_FLAGS)
 $(export-objs:.o=.s)  : export_flags   := $(EXPORT_FLAGS)
@@ -76,19 +84,19 @@ $(multi-objs-y:.o=.i)   : modname = $(modname-multi)
 $(multi-objs-y:.o=.s)   : modname = $(modname-multi)
 $(multi-objs-y:.o=.lst) : modname = $(modname-multi)
 
-quiet_cmd_cc_s_c = CC      $@
+quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
 cmd_cc_s_c       = $(CC) $(c_flags) -S -o $@ $< 
 
 %.s: %.c FORCE
 	$(call if_changed_dep,cc_s_c)
 
-quiet_cmd_cc_i_c = CPP     $@
+quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
 cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<
 
 %.i: %.c FORCE
 	$(call if_changed_dep,cc_i_c)
 
-quiet_cmd_cc_o_c = CC      $@
+quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
 cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 
 %.o: %.c FORCE
@@ -111,13 +119,13 @@ $(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)
 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(NOSTDINC_FLAGS) \
 	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
 
-quiet_cmd_as_s_S = CPP     $@
+quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $< 
 
 %.s: %.S FORCE
 	$(call if_changed_dep,as_s_S)
 
-quiet_cmd_as_o_S = AS      $@
+quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 
 %.o: %.S FORCE
@@ -164,7 +172,7 @@ endif
 # Rule to link composite objects
 #
 
-quiet_cmd_link_multi = LD      $@
+quiet_cmd_link_multi = LD $(quiet_modtag)  $@
 cmd_link_multi = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.o=-objs))) $($(subst $(obj)/,,$(@:.o=-y)))),$^)
 
 # We would rather have a list of rules like