git.m6w6.name Git - awesomized/libmemcached/blob - m4/ax_libevent.m4

   1 # https://github.com/BrianAker/ddm4
   2 # ===========================================================================
   3 #
   4 # SYNOPSIS
   5 #
   6 #   AX_LIBEVENT()
   7 #
   8 # DESCRIPTION
   9 #
  10 #   libevent library
  11 #
  12 # LICENSE
  13 #
  14 #   Copyright (c) 2012 Brian Aker <brian@tangent.org>
  15 #
  16 #   Copying and distribution of this file, with or without modification, are
  17 #   permitted in any medium without royalty provided the copyright notice
  18 #   and this notice are preserved. This file is offered as-is, without any
  19 #   warranty.
  20
  21 #serial 1
  22
  23   AC_DEFUN([AX_LIBEVENT],[
  24       AC_CACHE_CHECK([test for a working libevent], [ax_cv_libevent], [
  25         AX_SAVE_FLAGS
  26         LIBS="-levent $LIBS"
  27         AC_LANG_PUSH([C])
  28         AC_RUN_IFELSE([
  29           AC_LANG_PROGRAM([#include <event.h>], [
  30             struct event_base *tmp_event= event_init();
  31             event_base_free(tmp_event);
  32             ])],
  33           [ax_cv_libevent=yes],
  34           [ax_cv_libevent=no],
  35           [AC_MSG_WARN([test program execution failed])])
  36         AC_LANG_POP
  37         AX_RESTORE_FLAGS
  38         ])
  39
  40       AS_IF([test "x$ax_cv_libevent" = "xyes"],[
  41         LIBEVENT_LDFLAGS="-levent"
  42         AC_SUBST(LIBEVENT_LDFLAGS)
  43         AC_DEFINE([HAVE_LIBEVENT],[1],[Define if event_init is present in event.h.])],[
  44         AC_DEFINE([HAVE_LIBEVENT],[0],[Define if event_init is present in event_init.h.])
  45         ])
  46
  47       AM_CONDITIONAL(HAVE_LIBEVENT, test "x$ax_cv_libevent" = "xyes")
  48       ])
  49