CODEWITHSUNDEEP
cmakefile
mrQWERTY
mrQWERTY

Reputation: 4149

Makefile issue - No rule to make target 'gcc'

I have just started learning make and I am having some trouble. I want to create an executable called sortfile. Here are the relevant files: sortfile.c fileio.c fileio.h

Both sortfile.c and fileio.c use fileio.h.

Here is my makefile:

  1 CC = gcc                                                                                                                                                                                                                                  
  2 CFLAGS = -g -Wall                                                                                                                                                                                                                         
  3                                                                                                                                                                                                                                           
  4 default: sortfile                                                                                                                                                                                                                         
  5                                                                                                                                                                                                                                           
  6 sortfile: sortfile.o fileio.o $(CC) $(CFLAGS) -o sortfile sortfile.o fileio.o                                                                                                                                                             
  7                                                                                                                                                                                                                                           
  8 sortfile.o: sortfile.c fileio.h $(CC) $(CFLAGS) -c sortfile.c                                                                                                                                                                             
  9                                                                                                                                                                                                                                           
 10 fileio.o: fileio.c fileio.h $(CC) $(CFLAGS) -c fileio.c                                                                                                                                                                                   
 11                                                                                                                                                                                                                                           
 12 clean:                                                                                                                                                                                                                                    
 13         $(RM) sortfile *.o*~

I am getting the following error: 

make: *** No rule to make target `gcc', needed by `sortfile.o'.  Stop.

Upvotes: 1

Views: 2916

Answers (1)

Brian Cain
Brian Cain

Reputation: 14619

Makefiles are of the format:

target: dependency1 dependency2
    rule (command to build)

You listed the command as the set of dependencies, so make wants to try to build gcc before it can expect sortfile.o to be satisfied.

Instead of:

sortfile.o: sortfile.c fileio.h $(CC) $(CFLAGS) -c sortfile.c

you need:

sortfile.o: sortfile.c fileio.h
    $(CC) $(CFLAGS) -c sortfile.c

Note that normally all you really want here is something much simpler:

CFLAGS+=-g -Wall
all: sortfile
sortfile: sortfile.o fileio.o

This brief Makefile will work as expected with GNU Make because of implicit rules (see also).

Upvotes: 3

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