Flymake for c programs

[andrea]

I love flymake and I use it almost everywhere.

I would like to use it also with c files, but is it possible to use it
also without Makefiles?

Also after I added a simple Makefile it gives me a syntax check error,
this is the code I was trying.
--8<---------------cut here---------------start------------->8---
#include <stdlib.h>

int main(int argc, char *argv[])
{
  printf("hello world");
  return 0;
}

--8<---------------cut here---------------end--------------->8---
And the makefile simply
--8<---------------cut here---------------start------------->8---
all: hello

hello: prova.o
        cc prova.c -o prova

clean:
        rm -v *o

--8<---------------cut here---------------end--------------->8---


Any idea?
Regards,
Andrea