Problem compiling libstdc++ is current 4.0.2 cvs (volatile strikes again)

[Kean Johnston]

> The error makes perfect sense. __pthread_mutex has only one
> assignment operator for it (implicitly generated by the compiler):
>    __pthread_mutex & operator=(const __pthread_mutex&).
> When you try to pass a volatile __pthread_mutex (named as
> pthread_mutex_t), the compiler can't pass it to the assignment
> operator - because then `volatile' would be stripped off the
> reference.
> 
> I have created a small test case to demonstrate this:
>   typedef volatile struct A{} Av;
>   void foo()
>   {
>      Av x;
>      x = Av();
>   }
> 
> This test gives an error with any compiler I could tested it with:
>    gcc-2.96, gcc-3.2.1, gcc-4.0.0, xlC-6.0.0
Interestingly enough, it gives an error with the native
compiler too (based on teh EDG front-end).

To fix this for GCC, I will fixincludes the volatile away.

> Do you know why the type itself is defined as volatile, as opposed to
I don't, but I shall ask the person who wrote the header file.

> declaring only relevant variables as volatile? What system is it anyway?
System V Release 5 (UnixWare / OpenServer 6).

Kean