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document g++ 5.1 + libpthread volatile workaround (PR lib/49989)

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pooka 2015-06-26 10:25:41 +00:00
parent 24bdf1ef99
commit 7088070459
1 changed files with 23 additions and 1 deletions
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@ -1,4 +1,4 @@
# $NetBSD: HACKS,v 1.159 2015/05/08 09:44:45 martin Exp $
# $NetBSD: HACKS,v 1.160 2015/06/26 10:25:41 pooka Exp $
#
# This file is intended to document workarounds for currently unsolved
# (mostly) compiler bugs.
@ -381,6 +381,28 @@ descr
used in the link(2) system call.
kcah
hack g++ 5.1 barfs on volatile in initializers
cdata 26 Jun 2015
who pooka
file src/lib/libpthread/pthread_types.h : 1.14
file src/lib/libpthread/pthread_types.h : 1.15
pr lib/49989
descr
Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER
in C++ results in:
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;
kcah
port vax
hack gcc4/vax ICE