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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/65500] [5 Regression] FAIL: 17_intro/headers/c++2014/all_attributes.cc (test for excess errors)
Date: Sat, 21 Mar 2015 09:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65500

--- Comment #1 from dave.anglin at bell dot net ---
On 2015-03-20, at 5:00 PM, danglin at gcc dot gnu.org wrote:

> FAIL: 17_intro/headers/c++2014/all_attributes.cc (test for excess errors)
> Excess errors:
> /test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/shared_mutex:64:34:
> error: narrowing conversion of '35985' from 'int' to 'short int' inside { }
> 
> The define in sys/pthread.h is:
> #define __LWP_RWLOCK_VALID              0x8c91

It looks like this bug was triggered by this change:

2015-03-18  Jonathan Wakely  <jwakely@redhat.com>
            Torvald Riegel  <triegel@redhat.com>

        * acinclude.m4 (GLIBCXX_CHECK_GTHREADS): Check for pthread_rwlock_t.
        * config.h.in: Regenerate.
        * configure: Regenerate.
        * include/std/shared_mutex: Check _GLIBCXX_USE_PTHREAD_RWLOCK_T.
        (shared_timed_mutex::_M_rwlock): Use PTHREAD_RWLOCK_INITIALIZER.
        (shared_timed_mutex::lock_shared()): Retry on EAGAIN.
        (shared_timed_mutex::try_lock_shared_until()): Retry on EAGAIN and
        EDEADLK.

At one time, GCC was permissive about system header issues, particularly when
they aren't
really a problem.  Is this still the case?

It looks like an include hack would fix but there's probably more issues like
this.

Dave
--
John David Anglin    dave.anglin@bell.net