$ gcc -c -o mon_foo.o mon_foo.c -I.
$ g++ -c -o sample.o sample.cc
$ g++ -o sample mon_foo.o sample.o -ldl -llttng-ust
sample.o:(__tracepoints+0x0): multiple definition of `__tracepoint_mon___monfoo'
mon_foo.o:(__tracepoints+0x0): first defined here
collect2: ld returned 1 exit status

mon_foo.h
--- 8< ----
#undef TRACEPOINT_PROVIDER
#define TRACEPOINT_PROVIDER mon

#undef TRACEPOINT_INCLUDE_FILE
#define TRACEPOINT_INCLUDE_FILE ./mon_foo.h

#if !defined(_MON_FOO_H) || defined(TRACEPOINT_HEADER_MULTI_READ)
#define _MON_FOO_H

#include <lttng/tracepoint.h>



#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus */

TRACEPOINT_EVENT(
  mon,
  monfoo,
  TP_ARGS(int, s),
  TP_FIELDS(
    ctf_integer(int, state, s)
  )
)

#endif /* _MON_FOO_H */

#include <lttng/tracepoint-event.h>

#ifdef __cplusplus
}
#endif /*__cplusplus */
--- 8< ---

mon_foo.c
--- 8< ---
#define TRACEPOINT_CREATE_PROBES
/*
 * The header containing our TRACEPOINT_EVENTs.
 */
#define TRACEPOINT_DEFINE
#include "mon_foo.h"
--- 8< ---

sample.cc
--- 8< ---
#include <unistd.h>

/*
 * We need to define TRACEPOINT_DEFINE in one C file in the program
 * before including provider headers.
 */
#define TRACEPOINT_DEFINE
#include "mon_foo.h"

int main(int argc, char **argv)
{
  int i = 0;

  for (i = 0; i < 100000; i++) {

    tracepoint(mon, monfoo, i);
    usleep(1);
  }
  return 0;
}
--- 8< ---