MakeFile not working

[camel-man]

hellomake: hellomake.c hellofunc.c hellomake.h
	gcc -o hellomake hellomake.c hellofunc.c -I.

thats the makefile and here are the files

#include "hellomake.h"
#include<stdio.h>

void myPrintHelloMake(void) {

  printf("Hello makefiles!\n");

  return;
}

hellomake.h

/*
example include file
*/

void myPrintHelloMake(void);

#include <stdio.h>

int main() {
  // call a function in another file
  myPrintHelloMake();

  return(0);
}

last one is hellomake.c



I am typing in make and it says no makefile found

[rmatze]

try make -f <makefile name>

[camel-man]

that compiled my code but now when I type make it still doesnt execute it

[anduril462]

rmatze is right. You probably didn't name your make file with a standard name that make recognizes. The typical name is just "Makefile", if you don't use a standard name, you need to specify what make file you want with the -f command.

Also note:

1. Your organization is a bit backwards. You should rename hellomake.h to hellofunc.h, since it has the prototype for the function in hellofunc.c.
2. You need to include hellofunc.h in hellomake.c, the file where you actually call the function, not hellofunc.c where you define it (see footnote).
3. Since the prototype is included in hellomake.c, but refers to a function in an external .c file (hellofunc.c), you need to use the extern keyword: extern void myPrintHelloMake(void);
4. You should use include guards for every header file you make: Include guard - Wikipedia, the free encyclopedia.

Footnote: If you compile with the warnings set to high, you would have seen a message about this. Add the -Wall option to the gcc command in your make file.

[anduril462]

that compiled my code but now when I type make it still doesnt execute it

Running make wont execute hellomake unless you tell it to. This is normally not done, since make is generally used for building/compiling, not running arbitrary programs. If you really want to run the program via the make file, you need to add it to the make file:

$ cat Makefile
hellomake: hellomake.c hellofunc.c hellomake.h
        gcc -Wall -o hellomake hellomake.c hellofunc.c -I.
        ./hellomake
$ make
gcc -Wall -o hellomake hellomake.c hellofunc.c -I.
./hellomake
Hello makefiles!

If you want to run your program like a normal person, just do:

$ ./hellomake
Hello makefiles!