contrib/ntp/sntp/m4/ntp_rlimit.m4

   1 dnl ######################################################################
   2 dnl rlimit capabilities checks
   3 AC_DEFUN([NTP_RLIMIT_ITEMS], [
   4
   5 AC_CACHE_CHECK(
   6     [for RLIMIT_MEMLOCK],
   7     [ntp_cv_rlimit_memlock],
   8     [AC_COMPILE_IFELSE(
   9         [AC_LANG_PROGRAM(
  10             [[
  11                 #ifdef HAVE_SYS_TYPES_H
  12                 # include <sys/types.h>
  13                 #endif
  14                 #ifdef HAVE_SYS_TIME_H
  15                 # include <sys/time.h>
  16                 #endif
  17                 #ifdef HAVE_SYS_RESOURCE_H
  18                 # include <sys/resource.h>
  19                 #endif
  20             ]],
  21             [[
  22                 getrlimit(RLIMIT_MEMLOCK, 0);
  23             ]]
  24         )],
  25         [ntp_cv_rlimit_memlock=yes],
  26         [ntp_cv_rlimit_memlock=no]
  27     )]
  28 )
  29 case "$host" in
  30  *-*-*linux*)
  31     ntp_dflt_rlimit_memlock="-1" ;;
  32  *) ntp_dflt_rlimit_memlock="32" ;;
  33 esac
  34 case "$ntp_cv_rlimit_memlock" in
  35  yes)
  36     AC_SUBST([HAVE_RLIMIT_MEMLOCK])
  37     HAVE_RLIMIT_MEMLOCK=" memlock $ntp_dflt_rlimit_memlock"  ;;
  38 esac
  39
  40 AC_CACHE_CHECK(
  41     [for RLIMIT_STACK],
  42     [ntp_cv_rlimit_stack],
  43     [AC_COMPILE_IFELSE(
  44         [AC_LANG_PROGRAM(
  45             [[
  46                 #ifdef HAVE_SYS_TYPES_H
  47                 # include <sys/types.h>
  48                 #endif
  49                 #ifdef HAVE_SYS_TIME_H
  50                 # include <sys/time.h>
  51                 #endif
  52                 #ifdef HAVE_SYS_RESOURCE_H
  53                 # include <sys/resource.h>
  54                 #endif
  55             ]],
  56             [[
  57                 getrlimit(RLIMIT_STACK, 0);
  58             ]]
  59         )],
  60         [ntp_cv_rlimit_stack=yes],
  61         [ntp_cv_rlimit_stack=no]
  62     )]
  63 )
  64 case "$ntp_cv_rlimit_stack" in
  65  yes)
  66     AC_SUBST([HAVE_RLIMIT_STACK])
  67     HAVE_RLIMIT_STACK=" stacksize 50"
  68 esac
  69
  70 # HMS: Only if we are doing the MLOCKALL stuff...
  71 AC_MSG_CHECKING([for the default number of 4k stack pages])
  72 AC_ARG_WITH(
  73     [stack-limit],
  74     [AS_HELP_STRING(
  75         [--with-stack-limit],
  76         [? =50 (200 for openbsd) 4k pages]
  77     )],
  78     [ans=$withval],
  79     [ans=yes]
  80 )
  81 case "$ans" in
  82  yes | no)
  83     case "$host" in
  84      *-*-openbsd*)
  85         ans=200
  86         ;;
  87      *) ans=50
  88         ;;
  89     esac
  90     ;;
  91  [[1-9]][[0-9]]*)
  92     ;;
  93  *) AC_MSG_ERROR(["--with-stack-limit requires an integer argument."])
  94     ;;
  95 esac
  96 AC_MSG_RESULT([$ans])
  97 AC_DEFINE_UNQUOTED([DFLT_RLIMIT_STACK], [$ans],
  98     [Default number of 4k pages for RLIMIT_STACK])
  99
 100 # HMS: only if we have RLIMIT_MEMLOCK
 101 AC_MSG_CHECKING([for the default number of megabytes to MEMLOCK])
 102 AC_ARG_WITH(
 103     [memlock],
 104     [AS_HELP_STRING(
 105         [--with-memlock],
 106         [? =32 (-1 on linux) megabytes]
 107     )],
 108     [ans=$withval],
 109     [ans=yes]
 110 )
 111 case "$ans" in
 112  yes | no)
 113     ans=$ntp_dflt_rlimit_memlock
 114     ;;
 115  [[1-9]][[0-9]]*) ;;
 116  *) AC_MSG_ERROR(["--with-memlock requires an integer argument."])
 117      ;;
 118 esac
 119 AC_MSG_RESULT([$ans])
 120 AC_DEFINE_UNQUOTED([DFLT_RLIMIT_MEMLOCK], [$ans],
 121     [Default number of megabytes for RLIMIT_MEMLOCK])
 122
 123 ])dnl
 124
 125 dnl ======================================================================