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libiconv v1.14

    1: # lock.m4 serial 11 (gettext-0.18.2)
    2: dnl Copyright (C) 2005-2011 Free Software Foundation, Inc.
    3: dnl This file is free software; the Free Software Foundation
    4: dnl gives unlimited permission to copy and/or distribute it,
    5: dnl with or without modifications, as long as this notice is preserved.
    6: 
    7: dnl From Bruno Haible.
    8: 
    9: AC_DEFUN([gl_LOCK],
   10: [
   11:   AC_REQUIRE([gl_THREADLIB])
   12:   if test "$gl_threads_api" = posix; then
   13:     # OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the
   14:     # pthread_rwlock_* functions.
   15:     AC_CHECK_TYPE([pthread_rwlock_t],
   16:       [AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1],
   17:          [Define if the POSIX multithreading library has read/write locks.])],
   18:       [],
   19:       [#include <pthread.h>])
   20:     # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
   21:     AC_COMPILE_IFELSE([
   22:       AC_LANG_PROGRAM(
   23:         [[#include <pthread.h>]],
   24:         [[
   25: #if __FreeBSD__ == 4
   26: error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
   27: #else
   28: int x = (int)PTHREAD_MUTEX_RECURSIVE;
   29: return !x;
   30: #endif
   31:         ]])],
   32:       [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1],
   33:          [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
   34:   fi
   35:   gl_PREREQ_LOCK
   36: ])
   37: 
   38: # Prerequisites of lib/lock.c.
   39: AC_DEFUN([gl_PREREQ_LOCK], [
   40:   AC_REQUIRE([AC_C_INLINE])
   41: ])