CODEWITHSUNDEEP
makefile
user2122968
user2122968

Reputation:

How to hide print information of Makefile?

when Makefile execute some tasks, il will print many information in console, can we choose to hide them? when I have many .o to generate, these information will be too many to see and they are just meaningless if we don't read them.

The following code

$(obj)environment.o: $(src)environment.c
                      $(CC) $(AFLAGS) -Wa, --no-warn \
                             -DENV_CRC=$(shell $(obj)../tools/envcrc) \
                             -c -o $@ $(src)environment.c

will print heavy information like

arm-linux-gcc -g  -Os   -fno-strict-aliasing  -fno-common -ffixed-r8 -msoft-float  
-D__KERNEL__ -DTEXT_BASE=0x01000000  
-I/home/mingzhao/Documents/bootloader/u-boot-1.2.0/include 
-fno-builtin -ffreestanding -nostdinc -isystem  
/home/mingzhao/Documents/bootloader/arm/4.3.2/bin/../lib/
gcc/arm-none-linux-gnueabi/4.3.2/include -pipe  -DCONFIG_ARM 
-D__ARM__ -march=armv4 -mabi=apcs-gnu -Wall -Wstrict-prototypes  
-c -o environment.o environment.c

Upvotes: 3

Views: 4638

Answers (4)

MadScientist
MadScientist

Reputation: 101041

The "right" way to handle this (IMO) is to add this to your makefile:

$(VERBOSE).SILENT:

Then in your rules where you don't ever want the command printed (for example, an echo statement as in Beta's answer below) you prefix it with @. For all other commands, you don't prefix it with @.

What this does is enable "silent" mode by default (because the variable VERBOSE is not set and so this resolves to the .SILENT pseudo-target).

Then if you want to see everything, you add a VERBOSE=1 (actually you can set it to any non-empty value, so VERBOSE=true if you prefer). When you do that it turns off "silent" mode because the above line expands to 1.SILENT: (or true.SILENT: or whatever) which is meaningless to make.

Upvotes: 4

Junior Dussouillez
Junior Dussouillez

Reputation: 2397

You can use this syntax : @$(CC) $(AFLAGS) -Wa, --no-warn \...

Upvotes: 0

Beta
Beta

Reputation: 99154

I like something like this:

$(obj)environment.o: $(src)environment.c
    @echo building $@
    @$(CC) $(AFLAGS) -Wa, --no-warn \
      -DENV_CRC=$(shell $(obj)../tools/envcrc) \
      -c -o $@ $(src)environment.c

The @echo ... gives a minimal status message, the '@' in front of the $(CC) suppresses standard output (but still allows error messages).

Upvotes: 1

twin
twin

Reputation: 1669

You can use the option make --silent which will suppress output for all targets. If you want to suppress output for some commands, you can prefix them by @

Upvotes: 2

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