gistfile1.txt

whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ cat foo.h
#ifndef FOO_H
#define FOO_H

typedef struct foo_int *foo_t;

//foo_t init_foo();
int run_foo(foo_t foo);

#endif //FOO_H
whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ cat foo.c
#include "foo.h"
#include <stdlib.h>

struct foo_int {
  int bar;
};

foo_t init_foo() {
  return malloc(sizeof(struct foo_int));
}

int run_foo(foo_t foo) {
  return ((struct foo_int*)foo)->bar + 20;
}

whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ cat main.c
#include <stdio.h>
#include "foo.h"

int main(void)
{
  foo_t foo = init_foo();
  int res = run_foo(foo);
  printf("%d\n", res);
  return 0;
}
whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ llvm-gcc -c foo.c -Wall
whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ llvm-gcc -c main.c -Wall
main.c: In function ‘main’:
main.c:6: warning: implicit declaration of function ‘init_foo’
main.c:6: warning: initialization makes pointer from integer without a cast
whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ llvm-gcc foo.o main.o
whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ ./a.out 
zsh: segmentation fault  ./a.out
whiter4bbit@mac-mini-pavel ~/dev/objc_fun/llvm-bug $ llvm-gcc --version
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.9.00)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.