uimage 的 quiet_cmd_uimage ...

在找 uImage 的 Makefile 時，最後指向：

 arch/arm/boot/Makefile

其中：

quiet_cmd_uimage = UIMAGE  $@
     cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A arm -O linux -T kernel \
                  -C none -a $(LOADADDR) -e $(LOADADDR) \
                  -n 'Linux-$(KERNELRELEASE)' -d $< $@  

但是我到處都找不到 ref quiet_cmd_uimage 和 cmd_uimage 的地方。 後來找到原來是 .. Kbuild

---

Kbuild 的 instruction:

  quiet_cmd_CMD = 要顯示的
       cmd_CMD = 要執行的

有關Kbuild 在 kernel/Documentation/kbuild/makefile.txt 有說明:

--- 6.7 Custom kbuild commands

        When kbuild is executing with KBUILD_VERBOSE=0, then only a shorthand
        of a command is normally displayed.
        To enable this behaviour for custom commands kbuild requires
        two variables to be set:
        quiet_cmd_<command>     - what shall be echoed
              cmd_<command>     - the command to execute

        Example:
                #
                quiet_cmd_image = BUILD   $@
                      cmd_image = $(obj)/tools/build $(BUILDFLAGS) \
                                                     $(obj)/vmlinux.bin > $@

                targets += bzImage
                $(obj)/bzImage: $(obj)/vmlinux.bin $(obj)/tools/build FORCE
                        $(call if_changed,image)
                        @echo 'Kernel: $@ is ready'

        When updating the $(obj)/bzImage target, the line

        BUILD    arch/i386/boot/bzImage

        will be displayed with "make KBUILD_VERBOSE=0".