makefile:4: *** missing separator. Stop

问题:

This is my makefile:

all:ll

ll:ll.c   
  gcc  -c  -Wall -Werror -02 c.c ll.c  -o  ll  $@  $<

clean :
  \rm -fr ll

When I try to make clean or make make, I get this error:

:makefile:4: *** missing separator.  Stop.

How can I fix it?

回答1:

makefile has a very stupid relation with tabs , all actions of every rule are identified by tabs ...... and No 4 spaces dont make a tab , only a tab makes a tab...

to check i use the command cat -e -t -v makefile_name

it shows the presence of tabs with ^I and line endings with $ both are vital to ensure that dependencies end properly and tabs mark the action for the rules so that they are easily identifiable to the make utility.....

example :

Kaizen ~/so_test $ cat -e -t -v  mk.t
all:ll$      ## here the $ is end of line ...                   
$
ll:ll.c   $
^Igcc  -c  -Wall -Werror -02 c.c ll.c  -o  ll  $@  $<$ 
## the ^I above means a tab was there before the action part, so this line is ok .
 $
clean :$
   \rm -fr ll$
## see here there is no ^I which means , tab is not present .... 
## in this case you need to open the file again and edit/ensure a tab 
## starts the action part

hope this helps !!

回答2:

You should always write command after a "tab" and not white space.

This applies to "gcc" line (line #4) in your case. You need to insert tab before gcc.

Also replace \rm -fr ll with "rm -fr ll". Insert tabs before this command too

回答3:

On VS Code, just click the "Space: 4" on the downright corner and change it to tab when editing your Makefile.

回答4:

Its pretty old question but still I would like say about one more option using vi/vim editor to visualize the tabs. If you have vi/vim installed then open a Makefile (e.g. vim Makefile) and enter :set list. This will show number of tabs inserted as below,

 %-linux: force$
^I@if [ "$(GCC_VERSION)" = "2.96" ] ; then \$
^I^Iecho ===== Generating build tree for legacy $@ architecture =====; \$
^I^I$(CONFIGURE) $(CWD) $@ legacy; \$
^Ielse \$
^I^Iecho ===== Generating build tree for $@ architecture =====; \$
^I^I$(CONFIGURE) $(CWD) $@; \$
^Ifi$
^Icd build-$@;make$

回答5:

The key point was "HARD TAB" 1. Check whether you used TAB instead of whitespace 2. Check your .vimrc for "set tabstop=X"

回答6:

This is because tab is replaced by spaces. To disable this feature go to

gedit->edit->preferences->editor

and remove check for

"replace tab with space"

回答7:

If anyone of you are using a product from Intellij, the solution for this it's the following:

1. Go to Preferences > Editor > Code Style
2. here you need to select the file type related to your problem. But most probably you need to select Other File Types.
3. In the tab opened mark the checkbox for Use tab character and be careful, Tab size and Indent values must be 4.

回答8:

If you are using mcedit for makefile edit. you have to see the following mark.