2009/8/7 yihect <yihect@xxxxxxx>: > Hi all: > Sorry, everybody. I sent the same mail in HTML-FORMAT, so maybe there presented > disorderly characters in your mail client program. It's time waste to open that mail. > So sorry, and I resend this mail with same content... > > I'm reading top-level makefile of kernel version of 2.6.25, and being confused about > "$(Q)@" in following lines: > > 124 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make > 125 $(Q)@: > > I know what's meaning for line 124, but what about line 125? Is it a command? Are u notice the comment in the Makefile ? u need more carefully to read the Makefile ^_^....... # Beautify output # --------------------------------------------------------------------------- # # Normally, we echo the whole command before executing it. By making # that echo $($(quiet)$(cmd)), we now have the possibility to set # $(quiet) to choose other forms of output instead, e.g. # # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< # # If $(quiet) is empty, the whole command will be printed. # If it is set to "quiet_", only the short version will be printed. # If it is set to "silent_", nothing will be printed at all, since # the variable $(silent_cmd_cc_o_c) doesn't exist. # # A simple variant is to prefix commands with $(Q) - that's useful # for commands that shall be hidden in non-verbose mode. # # $(Q)ln $@ :< # # If KBUILD_VERBOSE equals 0 then the above command will be hidden. # If KBUILD_VERBOSE equals 1 then the above command is displayed. ifeq ($(KBUILD_VERBOSE),1) quiet = Q = else quiet=quiet_ Q = @ endif > I know the "$(Q)@" indicates nothing if KBUILD_VERBOSE==1,and @ if KBUILD_VERBOSE gave other > values. > > Thanks.. > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
