Steps to reproduce:
Due the different implementations of g_static_mutex_[un]lock between i386/x86_64 and ppc/ppc64 architectures there are problems when an application is compiled with -Werror.

I have this code (taken from the OpenHPI project):
-----------------------
#include <glib.h>

static GStaticMutex oh_uid_lock = G_STATIC_MUTEX_INIT;

void oh_uid_initialize(void)
{
        g_static_mutex_lock(&oh_uid_lock);
}
-----------------------

and it leads after many simplifications onto:
-----------------------
typedef struct _GStaticMutex GStaticMutex;
struct _GStaticMutex
{
  struct _GMutex *runtime_mutex;
};

typedef void* gpointer;

gpointer g_atomic_pointer_get (volatile gpointer *atomic);

static GStaticMutex oh_uid_lock = { ((void *)0) };

void oh_uid_initialize(void);

void oh_uid_initialize(void)
{
    g_atomic_pointer_get (&((&oh_uid_lock)->runtime_mutex));
}
-----------------------

and the resulting error message is

cc1: warnings being treated as errors
test.c: In function ‘oh_uid_initialize’:
test.c:23: warning: passing argument 1 of ‘g_atomic_pointer_get’ from incompatible pointer type


Stack trace:


Other information: