- improve building utils

  Either by first compiling objects and linking those or by just passing
  the source to create the desired binary (this patchlet does the latter).
  Fixes cosmetic glitch by just not building individual .o (in pwd, at least).

Makerules

@@ -60,6 +60,7 @@ endif
 show_objs = $(subst ../,,$@)
 
 pur_disp_compile.c = echo "  "CC $(show_objs)
+pur_disp_compile.u = echo "  "CC $(show_objs)
 pur_disp_compile.S = echo "  "AS $(show_objs)
 pur_disp_compile.m = $(pur_disp_compile.c)
 pur_disp_compile-m = echo "  "CC-m $(show_objs)
@@ -69,6 +70,7 @@ pur_disp_ar        = echo "  "AR $(ARFLAGS) $@
 pur_disp_ld        = echo "  "LD $(1)
 
 sil_disp_compile.c = true
+sil_disp_compile.u = true
 sil_disp_compile.S = true
 sil_disp_compile.m = true
 sil_disp_compile-m = true
@@ -78,6 +80,7 @@ sil_disp_ar        = true
 sil_disp_ld        = true
 
 ver_disp_compile.c = echo $(cmd_compile.c)
+ver_disp_compile.u = echo $(cmd_compile.u)
 ver_disp_compile.S = echo $(cmd_compile.S)
 ver_disp_compile.m = echo $(cmd_compile.m)
 ver_disp_compile-m = echo $(cmd_compile-m)
@@ -87,6 +90,7 @@ ver_disp_ar        = echo $(cmd_ar)
 ver_disp_ld        = 
 
 disp_compile.c = $($(DISP)_disp_compile.c)
+disp_compile.u = $($(DISP)_disp_compile.u)
 disp_compile.S = $($(DISP)_disp_compile.S)
 disp_compile.m = $($(DISP)_disp_compile.m)
 disp_compile-m = $($(DISP)_disp_compile-m)
@@ -96,6 +100,7 @@ disp_ar        = $($(DISP)_disp_ar)
 disp_ld        = $($(DISP)_disp_ld)
 
 cmd_compile.c = $(CC) -c $< -o $@ $(CFLAGS) $(ARCH_CFLAGS) $(CFLAGS-$(suffix $@)) $(filter-out $(CFLAGS-OMIT-$(notdir $<)),$(CFLAGS-$(notdir $(^D)))) $(CFLAGS-$(subst $(top_srcdir),,$(dir $<))) $(CFLAGS-$(notdir $<)) $(CFLAGS-$(notdir $@))
+cmd_compile.u = $(CC) $^ $(DEPS-$(notdir $@)) -o $@ $(CFLAGS) $(CFLAGS-$(notdir $(^D))) $(CFLAGS-$(notdir $@))
 cmd_compile.S = $(filter-out -std=gnu99, $(cmd_compile.c)) -D__ASSEMBLER__ $(ASFLAGS) $(ARCH_ASFLAGS) $(ASFLAGS-$(suffix $@)) $(ASFLAGS-$(notdir $<)) $(ASFLAGS-$(notdir $@))
 cmd_compile.m = $(cmd_compile.c) -DL_$(patsubst %$(suffix $(notdir $@)),%,$(notdir $@))
 cmd_compile-m = $(CC) $^ -c -o $@ $(CFLAGS) $(ARCH_CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(notdir $(@D))) $(CFLAGS-$(notdir $@))
@@ -114,8 +119,7 @@ do_t_strip= @$(disp_t_strip)   ; $(cmd_t_strip)
 do_ar     = @$(disp_ar)        ; $(cmd_ar)
 
 define compile.u
-	@$(disp_compile.c)
-	$(Q)$(CC) $^ $(DEPS-$(notdir $@)) -o $@ $(CFLAGS) $(CFLAGS-$(notdir $(^D))) $(CFLAGS-$(notdir $@))
+	@$(disp_compile.u) ; $(cmd_compile.u)
 	@$(disp_strip)
 	$(Q)$(STRIPTOOL) $(STRIP_FLAGS) $@
 endef