external/bsd/bind/dist/config.threads.in

   1 #
   2 # Begin pthreads checking.
   3 #
   4 # First, decide whether to use multithreading or not.
   5 #
   6 # Enable multithreading by default on systems where it is known
   7 # to work well, and where debugging of multithreaded programs
   8 # is supported.
   9 #
  10
  11 AC_MSG_CHECKING(whether to build with thread support)
  12
  13 case $host in
  14 *-dec-osf*)
  15         use_threads=true ;;
  16 [*-solaris2.[0-6]])
  17         # Thread signals are broken on Solaris 2.6; they are sometimes
  18         # delivered to the wrong thread.
  19         use_threads=false ;;
  20 *-solaris*)
  21         use_threads=true ;;
  22 *-ibm-aix*)
  23         use_threads=true ;;
  24 *-hp-hpux10*)
  25         use_threads=false ;;
  26 *-hp-hpux11*)
  27         use_threads=true ;;
  28 *-sgi-irix*)
  29         use_threads=true ;;
  30 *-sco-sysv*uw*|*-*-sysv*UnixWare*)
  31         # UnixWare
  32         use_threads=false ;;
  33 *-*-sysv*OpenUNIX*)
  34         # UnixWare
  35         use_threads=true ;;
  36 *-netbsd*)
  37         if test -r /usr/lib/libpthread.so ; then
  38             use_threads=true
  39         else
  40             # Socket I/O optimizations introduced in 9.2 expose a
  41             # bug in unproven-pthreads; see PR #12650
  42             use_threads=false
  43         fi
  44         ;;
  45 *-openbsd*)
  46         # OpenBSD users have reported that named dumps core on
  47         # startup when built with threads.
  48         use_threads=false ;;
  49 *-freebsd*)
  50         use_threads=false ;;
  51 *-bsdi[234]*)
  52         # Thread signals do not work reliably on some versions of BSD/OS.
  53         use_threads=false ;;
  54 *-bsdi5*)
  55         use_threads=true ;;
  56 *-linux*)
  57         # Threads are disabled on Linux by default because most
  58         # Linux kernels produce unusable core dumps from multithreaded
  59         # programs, and because of limitations in setuid().
  60         use_threads=false ;;
  61 *)
  62         use_threads=false ;;
  63 esac
  64
  65 AC_ARG_ENABLE(threads,
  66         [  --enable-threads     enable multithreading])
  67 case "$enable_threads" in
  68         yes)
  69                 use_threads=true
  70                 ;;
  71         no)
  72                 use_threads=false
  73                 ;;
  74         '')
  75                 # Use system-dependent default
  76                 ;;
  77         *)
  78                 AC_MSG_ERROR([--enable-threads takes yes or no])
  79                 ;;
  80 esac
  81
  82 if $use_threads
  83 then
  84         AC_MSG_RESULT(yes)
  85 else
  86         AC_MSG_RESULT(no)
  87 fi
  88
  89 if $use_threads
  90 then
  91         #
  92         # Search for / configure pthreads in a system-dependent fashion.
  93         #
  94         case "$host" in
  95           *-netbsd*)
  96                 # NetBSD has multiple pthreads implementations.  The
  97                 # recommended one to use is "unproven-pthreads".  The
  98                 # older "mit-pthreads" may also work on some NetBSD
  99                 # versions.  The PTL2 thread library does not
 100                 # currently work with bind9, but can be chosen with
 101                 # the --with-ptl2 option for those who wish to
 102                 # experiment with it.
 103                 CC="gcc"
 104                 AC_MSG_CHECKING(which NetBSD thread library to use)
 105
 106                 AC_ARG_WITH(ptl2,
 107 [  --with-ptl2          on NetBSD, use the ptl2 thread library (experimental)],
 108                     use_ptl2="$withval", use_ptl2="no")
 109
 110                 : ${LOCALBASE:=/usr/pkg}
 111
 112                 if test "X$use_ptl2" = "Xyes"
 113                 then
 114                         AC_MSG_RESULT(PTL2)
 115                         AC_MSG_WARN(
 116 [linking with PTL2 is highly experimental and not expected to work])
 117                         CC=ptlgcc
 118                 else
 119                         if test -r /usr/lib/libpthread.so
 120                         then
 121                                 AC_MSG_RESULT(native)
 122                                 LIBS="-lpthread $LIBS"
 123                         else
 124                                 if test ! -d $LOCALBASE/pthreads
 125                                 then
 126                                         AC_MSG_RESULT(none)
 127                                         AC_MSG_ERROR("could not find thread libraries")
 128                                 fi
 129
 130                                 if $use_threads
 131                                 then
 132                                         AC_MSG_RESULT(mit-pthreads/unproven-pthreads)
 133                                         pkg="$LOCALBASE/pthreads"
 134                                         lib1="-L$pkg/lib -Wl,-R$pkg/lib"
 135                                         lib2="-lpthread -lm -lgcc -lpthread"
 136                                         LIBS="$lib1 $lib2 $LIBS"
 137                                         CPPFLAGS="$CPPFLAGS -I$pkg/include"
 138                                         STD_CINCLUDES="$STD_CINCLUDES -I$pkg/include"
 139                                 fi
 140                         fi
 141                 fi
 142                 ;;
 143                 *-freebsd*)
 144                         # We don't want to set -lpthread as that break
 145                         # the ability to choose threads library at final
 146                         # link time and is not valid for all architectures.
 147
 148                         PTHREAD=
 149                         if test "X$GCC" = "Xyes"; then
 150                                 saved_cc="$CC"
 151                                 CC="$CC -pthread"
 152                                 AC_MSG_CHECKING(for gcc -pthread support);
 153                                 AC_TRY_LINK([#include <pthread.h>],
 154                                             [printf("%x\n", pthread_create);],
 155                                             PTHREAD="yes"
 156                                             AC_MSG_RESULT(yes),
 157                                             AC_MSG_RESULT(no))
 158                                 CC="$saved_cc"
 159                         fi
 160                         if test "X$PTHREAD" != "Xyes"; then
 161                                 AC_CHECK_LIB(pthread, pthread_create,,
 162                                 AC_CHECK_LIB(thr, thread_create,,
 163                                 AC_CHECK_LIB(c_r, pthread_create,,
 164                                 AC_CHECK_LIB(c, pthread_create,,
 165                                 AC_MSG_ERROR("could not find thread libraries")))))
 166                         fi
 167                         ;;
 168                 *)
 169                         AC_CHECK_LIB(pthread, pthread_create,,
 170                                 AC_CHECK_LIB(pthread, __pthread_create,,
 171                                 AC_CHECK_LIB(pthread, __pthread_create_system,,
 172                                 AC_CHECK_LIB(c_r, pthread_create,,
 173                                 AC_CHECK_LIB(c, pthread_create,,
 174                                 AC_MSG_ERROR("could not find thread libraries"))))))
 175                 ;;
 176         esac
 177 fi