diff options
Diffstat (limited to 'm4/lock.m4')
| -rw-r--r-- | m4/lock.m4 | 32 |
1 files changed, 21 insertions, 11 deletions
@@ -1,5 +1,5 @@ -# lock.m4 serial 10 (gettext-0.18) -dnl Copyright (C) 2005-2010 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. @@ -10,28 +10,38 @@ AC_DEFUN([gl_LOCK], [ AC_REQUIRE([gl_THREADLIB]) if test "$gl_threads_api" = posix; then - # OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the + # 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_TRY_COMPILE([#include <pthread.h>], - [#if __FreeBSD__ == 4 + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM( + [[#include <pthread.h>]], + [[ +#if __FreeBSD__ == 4 error "No, in FreeBSD 4.0 recursive mutexes actually don't work." +#elif (defined __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ \ + && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070) +error "No, in Mac OS X < 10.7 recursive mutexes actually don't work." #else int x = (int)PTHREAD_MUTEX_RECURSIVE; return !x; -#endif], +#endif + ]])], [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1], [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])]) fi gl_PREREQ_LOCK ]) -# Prerequisites of lib/lock.c. -AC_DEFUN([gl_PREREQ_LOCK], [ - AC_REQUIRE([AC_C_INLINE]) -]) +# Prerequisites of lib/glthread/lock.c. +AC_DEFUN([gl_PREREQ_LOCK], [:]) |