ctdb/lib/tevent/libtevent.m4

   1 dnl Check to see if we should use the included tevent
   2
   3 INCLUDED_TEVENT=auto
   4 AC_ARG_WITH(included-tevent,
   5     [AC_HELP_STRING([--with-included-tevent], [use bundled tevent library, not from system])],
   6     [ INCLUDED_TEVENT=$withval ])
   7
   8 AC_SUBST(TEVENT_LIBS)
   9 AC_SUBST(TEVENT_CFLAGS)
  10
  11 if test x"$INCLUDED_TEVENT" != x"yes" ; then
  12     AC_CHECK_HEADERS(tevent.h)
  13     AC_CHECK_LIB(tevent, tevent_context_init, [ TEVENT_LIBS="-ltevent" ])
  14     AC_CHECK_DECLS([TEVENT_TRACE_BEFORE_WAIT],,, [[#include <tevent.h>]])
  15     if test x"$ac_cv_header_tevent_h" = x"no" -o \
  16         x"$ac_cv_lib_tevent_tevent_context_init" = x"no" -o \
  17         x"$ac_cv_have_decl_TEVENT_TRACE_BEFORE_WAIT" = x"no" ; then
  18         INCLUDED_TEVENT=yes
  19         TEVENT_CFLAGS=""
  20     else
  21         INCLUDED_TEVENT=no
  22     fi
  23 fi
  24
  25 AC_MSG_CHECKING(whether to use included tevent)
  26 AC_MSG_RESULT($INCLUDED_TEVENT)
  27 if test x"$INCLUDED_TEVENT" != x"no" ; then
  28     dnl find the tevent sources. This is meant to work both for
  29     dnl standalone builds, and builds of packages using libtevent
  30         teventdir=""
  31         teventpaths="$srcdir $srcdir/lib/tevent $srcdir/tevent $srcdir/../tevent"
  32         for d in $teventpaths; do
  33                 if test -f "$d/tevent.c"; then
  34                         teventdir="$d"
  35             AC_SUBST(teventdir)
  36                         break
  37                 fi
  38         done
  39         if test x"$teventdir" = "x"; then
  40            AC_MSG_ERROR([cannot find tevent source in $teventpaths])
  41         fi
  42     TEVENT_OBJ="tevent.o tevent_debug.o tevent_util.o"
  43     TEVENT_OBJ="$TEVENT_OBJ tevent_fd.o tevent_timed.o tevent_immediate.o tevent_signal.o"
  44     TEVENT_OBJ="$TEVENT_OBJ tevent_req.o tevent_wakeup.o tevent_queue.o"
  45     TEVENT_OBJ="$TEVENT_OBJ tevent_standard.o tevent_select.o tevent_poll.o"
  46     AC_SUBST(TEVENT_OBJ)
  47
  48     TEVENT_CFLAGS="-I$teventdir"
  49     AC_SUBST(TEVENT_CFLAGS)
  50
  51     TEVENT_LIBS=""
  52     AC_SUBST(TEVENT_LIBS)
  53
  54     AC_CHECK_HEADERS(sys/epoll.h)
  55     AC_CHECK_FUNCS(epoll_create)
  56     if test x"$ac_cv_header_sys_epoll_h" = x"yes" -a x"$ac_cv_func_epoll_create" = x"yes"; then
  57         TEVENT_OBJ="$TEVENT_OBJ tevent_epoll.o"
  58         AC_DEFINE(HAVE_EPOLL, 1, [Whether epoll available])
  59     fi
  60
  61     tevent_num_signals_includes="$ac_includes_default
  62     #include <signal.h>
  63     "
  64     tevent_num_signals=64
  65     AC_CHECK_VALUEOF(NSIG, [$tevent_num_signals_includes])
  66     v=$ac_cv_valueof_NSIG
  67     test -n "$v" && test "$v" -gt "$tevent_num_signals" && {
  68             tevent_num_signals=$v
  69     }
  70     AC_CHECK_VALUEOF(_NSIG, [$tevent_num_signals_includes])
  71     v=$ac_cv_valueof__NSIG
  72     test -n "$v" && test "$v" -gt "$tevent_num_signals" && {
  73             tevent_num_signals=$v
  74     }
  75     AC_CHECK_VALUEOF(SIGRTMAX, [$tevent_num_signals_includes])
  76     v=$ac_cv_valueof_SIGRTMAX
  77     test -n "$v" && test "$v" -gt "$tevent_num_signals" && {
  78             tevent_num_signals=$v
  79     }
  80     AC_CHECK_VALUEOF(SIGRTMIN, [$tevent_num_signals_includes])
  81     v=$ac_cv_valueof_SIGRTMIN
  82     test -n "$v" && {
  83             v=`expr $v + $v`
  84     }
  85     test -n "$v" && test "$v" -gt "$tevent_num_signals" && {
  86             tevent_num_signals=$v
  87     }
  88     AC_DEFINE_UNQUOTED(TEVENT_NUM_SIGNALS, $tevent_num_signals, [Max signal number value])
  89
  90     if test x"$VERSIONSCRIPT" != "x"; then
  91         EXPORTSFILE=tevent.exports
  92         AC_SUBST(EXPORTSFILE)
  93     fi
  94 fi