diff options
Diffstat (limited to 'gnulib-m4/lock.m4')
| -rw-r--r-- | gnulib-m4/lock.m4 | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gnulib-m4/lock.m4 b/gnulib-m4/lock.m4 index 1e83e236..cb04a67d 100644 --- a/gnulib-m4/lock.m4 +++ b/gnulib-m4/lock.m4 @@ -1,5 +1,5 @@ -# lock.m4 serial 13 (gettext-0.18.2) -dnl Copyright (C) 2005-2016 Free Software Foundation, Inc. +# lock.m4 serial 14 +dnl Copyright (C) 2005-2017 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -12,11 +12,16 @@ AC_DEFUN([gl_LOCK], if test "$gl_threads_api" = posix; then # OSF/1 4.0 and Mac OS X 10.1 lack the pthread_rwlock_t type and the # pthread_rwlock_* functions. + has_rwlock=false AC_CHECK_TYPE([pthread_rwlock_t], - [AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1], + [has_rwlock=true + AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1], [Define if the POSIX multithreading library has read/write locks.])], [], [#include <pthread.h>]) + if $has_rwlock; then + gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER + fi # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro. AC_COMPILE_IFELSE([ AC_LANG_PROGRAM( |