Hi all,
I hope someone can help me. I am C++ impaired, and I am getting
the following error when trying to bootstrap the current 4.0.2
CVS. The error is coming from include/ext/bitmap_allocator.h
line 111. The relevant code snippet is:
class _Mutex {
__gthread_mutex_t _M_mut;
// Prevent Copying and assignment.
_Mutex(_Mutex const&);
_Mutex& operator=(_Mutex const&);
public:
_Mutex()
{
if (__threads_enabled)
{
#if !defined __GTHREAD_MUTEX_INIT
_GTHREAD_MUTEX_INIT_FUNCTION(&_M_mut);
#else
__gthread_mutex_t __mtemp = __GTHREAD_MUTEX_INIT;
_M_mut = __mtemp; <<<<<<<< THIS CAUSES THE ERROR
#endif
}
}
I get the following error message from the compiler:
error: no match for 'operator=' in
'((__gnu_cxx::_Mutex)this)->__gnu_cxx::_Mutex::_M_Mut = __mtemp'
*/gcc/include/sys/types.h:678: note: candidates are: __pthread_mutex&
__pthread_mutex::operator=(const __pthread_mutex&)
The contents of sys/types.h at that location are:
typedef volatile struct __pthread_mutex {
mutex_t __pt_mutex_mutex;
pid_t __pt_mutex_pid;
thread_t __pt_mutex_owner;
int __pt_mutex_depth;
pthread_mutexattr_t __pt_mutex_attr;
} pthread_mutex_t;
If I remove the 'volatile' keyword, then everything just works.
So, do I adjust fixincludes to remove the 'volatile' keyword,
or is this some weird side effect of the recent discussions on
volatile (which I didn't read).
Any help / advice appreciated.
Oh PS ... if I change that from a simple assignment to:
__builtin_memcpy((void *)&_M_mut, (const void *)&__mtemp,
sizeof(__gthread_mutex_t));
Then it also just works. I could of course adjust the header file
to do that for the platform.
Kean
