csadev:/home/jmcnama> cc -Ae foo.c
csadev:/home/jmcnama> a.out
you found foo
you found foo
you found foo
you found foo
csadev:/home/jmcnama> lint foo.c


==============
name declared but never used or defined
    __bufendtab         stdio.h(744)
    errno       errno.h(39)
    ___sysconf          signal.h(207)
    __nl_char_size      stdlib.h(79)
    sigwait     signal.h(232)
    pthread_sigmask     signal.h(234)
    pthread_kill        signal.h(235)
    getdate_err         time.h(741)
    __iob       stdio.h(174)
function used with a variable number of arguments
    foo         foo.c(4) :: foo.c(12)
    foo         foo.c(4) :: foo.c(13)
    foo         foo.c(4) :: foo.c(14)
function returns value which is sometimes ignored
    foo

/* C99-(semi)compliant but perverse coding */
#include <stdlib.h>

int foo()
{
	return printf("you found foo\n");
}

int main()
{
	foo();
	foo(2);
	foo("hi there");
	return foo("this code stinks");
}