Re: lib/49989: libc++ fails to build with g++ 5.1 due to libpthread volatiles

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

The following reply was made to PR lib/49989; it has been noted by GNATS.

From: Joerg Sonnenberger <joerg%britannica.bec.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: lib/49989: libc++ fails to build with g++ 5.1 due to libpthread
 volatiles
Date: Tue, 23 Jun 2015 12:33:51 +0200

 On Sat, Jun 20, 2015 at 03:05:00PM +0000, pooka%iki.fi@localhost wrote:
 > === snip ===
 > libc++/dist/libcxx/include/__mutex_base:32:69: error: temporary of non-literal type '__pthread_mutex_st' in a constant expression
 >       constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {}
 > [...]
 > include/pthread_types.h:101:8: note: '__pthread_mutex_st' is not literal because:
 >  struct __pthread_mutex_st {
 >         ^
 > include/pthread_types.h:103:17: note:   non-static data member '__pthread_mutex_st::ptm_errorcheck' has volatile type
 >   pthread_spin_t ptm_errorcheck;
 
 This is likely an interaction of GCC not believing this to be a system
 hader and a bug in the C++11 specs when it comes to volatile in nested
 elements.
 
 Joerg