config-scripts/cups-threads.m4

   1 dnl
   2 dnl "$Id: cups-threads.m4 5466 2006-04-26 19:52:27Z mike $"
   3 dnl
   4 dnl   Threading stuff for the Common UNIX Printing System (CUPS).
   5 dnl
   6 dnl   Copyright 1997-2005 by Easy Software Products, all rights reserved.
   7 dnl
   8 dnl   These coded instructions, statements, and computer programs are the
   9 dnl   property of Easy Software Products and are protected by Federal
  10 dnl   copyright law.  Distribution and use rights are outlined in the file
  11 dnl   "LICENSE.txt" which should have been included with this file.  If this
  12 dnl   file is missing or damaged please contact Easy Software Products
  13 dnl   at:
  14 dnl
  15 dnl       Attn: CUPS Licensing Information
  16 dnl       Easy Software Products
  17 dnl       44141 Airport View Drive, Suite 204
  18 dnl       Hollywood, Maryland 20636 USA
  19 dnl
  20 dnl       Voice: (301) 373-9600
  21 dnl       EMail: cups-info@cups.org
  22 dnl         WWW: http://www.cups.org
  23 dnl
  24
  25 AC_ARG_ENABLE(threads, [  --enable-threads        enable multi-threading support])
  26
  27 have_pthread=no
  28 PTHREAD_FLAGS=""
  29
  30 if test "x$enable_threads" != xno; then
  31         AC_CHECK_HEADER(pthread.h, AC_DEFINE(HAVE_PTHREAD_H))
  32
  33         if test x$ac_cv_header_pthread_h = xyes; then
  34                 dnl Check various threading options for the platforms we support
  35                 for flag in -lpthreads -lpthread -pthread; do
  36                         AC_MSG_CHECKING([for pthread_create using $flag])
  37                         SAVELIBS="$LIBS"
  38                         LIBS="$flag $LIBS"
  39                         AC_TRY_LINK([#include <pthread.h>],
  40                                 [pthread_create(0, 0, 0, 0);],
  41                                 have_pthread=yes,
  42                                 LIBS="$SAVELIBS")
  43                         AC_MSG_RESULT([$have_pthread])
  44
  45                         if test $have_pthread = yes; then
  46                                 PTHREAD_FLAGS="-D_THREAD_SAFE -D_REENTRANT"
  47                                 break
  48                         fi
  49                 done
  50         fi
  51 fi
  52
  53 AC_SUBST(PTHREAD_FLAGS)
  54
  55 dnl
  56 dnl End of "$Id: cups-threads.m4 5466 2006-04-26 19:52:27Z mike $".
  57 dnl