Added ax_event_base.m4 to find and configure libevent
Modified configure.ac to pull in AX_EVENT_BASE
Modified Makefile.am to take EVENT settings from automake.
Reviewed by dcorson
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@664919 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/aclocal/ax_event_base.m4 b/lib/cpp/aclocal/ax_event_base.m4
new file mode 100644
index 0000000..4418350
--- /dev/null
+++ b/lib/cpp/aclocal/ax_event_base.m4
@@ -0,0 +1,84 @@
+dnl @synopsis AX_EVENT([MINIMUM-VERSION])
+dnl
+dnl Test for the libevent libraries of a particular version (or newer)
+dnl
+dnl If no path to the installed event library is given the macro
+dnl searchs under /usr, /usr/local, and /opt, and evaluates the
+dnl $EVENT_ROOT environment variable.
+dnl
+dnl This macro calls:
+dnl
+dnl AC_SUBST(EVENT_CPPFLAGS) / AC_SUBST(EVENT_LDFLAGS)
+dnl
+dnl And sets:
+dnl
+dnl HAVE_EVENT
+dnl
+dnl @category InstalledPackages
+dnl @category Cxx
+dnl @author Marc Kwiatkowski <marc@facebook.com>
+dnl @version 2006-06-15
+dnl @license AllPermissive
+
+AC_DEFUN([AX_EVENT_BASE],
+[
+AC_ARG_WITH([event],
+ AS_HELP_STRING([--with-event@<:@=DIR@:>@], [use event (default is yes) - it is possible to specify an alternate root directory for event]),
+ [
+ if test "$withval" = "no"; then
+ want_event="no"
+ elif test "$withval" = "yes"; then
+ want_event="yes"
+ ac_event_path=""
+ else
+ want_event="yes"
+ ac_event_path="$withval"
+ fi
+ ],
+ [want_event="yes"])
+
+if test "x$want_event" = "xyes"; then
+ event_lib_version_req=ifelse([$1], ,1.2.0,$1)
+ event_lib_version_req_shorten=`expr $event_lib_version_req : '\([[0-9]]*\.[[0-9]]*\)'`
+ event_lib_version_req_major=`expr $event_lib_version_req : '\([[0-9]]*\)'`
+ event_lib_version_req_minor=`expr $event_lib_version_req : '[[0-9]]*\.\([[0-9]]*\)'`
+ event_lib_version_req_sub_minor=`expr $event_lib_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
+ if test "x$event_lib_version_req_sub_minor" = "x" ; then
+ event_lib_version_req_sub_minor="0"
+ fi
+ WANT_EVENT_VERSION=`expr $event_lib_version_req_major \* 10000 \+ $event_lib_version_req_minor \* 100 \+ $event_lib_version_req_sub_minor`
+ WANT_EVENT_MAJOR_VERSION=$event_lib_version_req_major
+ WANT_EVENT_MINOR_VERSION=$event_lib_version_req_minor
+ AC_MSG_CHECKING(for eventlib >= $event_lib_version_req)
+ succeeded=no
+
+ if test "$ac_event_path" != "" && test -f "$ac_event_path/include/event.h"; then
+ ac_event_include_path=$ac_event_path/include
+ EVENT_CPPFLAGS="-I$ac_event_include_path"
+ EVENT_LDFLAGS="-L$ac_event_path/lib -levent"
+ succeeded=yes
+ else
+ for ac_event_path_tmp in /usr /usr/local /opt ; do
+ if test -f "$ac_event_path_tmp/include/event.h"; then
+ ac_event_include_path=$ac_event_path_tmp/include
+ EVENT_CPPFLAGS="-I$ac_event_include_path"
+ EVENT_LDFLAGS="-L$ac_event_path_tmp/lib -levent"
+ succeeded=yes
+ break;
+ fi
+ done
+ fi
+
+ if test "$succeeded" != "yes" ; then
+ AC_MSG_ERROR([[We could not detect the event libraries (version $event_lib_version_req_shorten or higher). If you have a staged event library (still not installed) please specify \$EVENT_ROOT in your environment and do not give a PATH to --with-event option. If you are sure you have event installed, then check your version number looking in <event/version.hpp>. See http://randspringer.de/event for more documentation.]])
+ else
+ AC_SUBST(EVENT_CPPFLAGS)
+ AC_SUBST(EVENT_LDFLAGS)
+ AC_DEFINE(HAVE_EVENT,,[define if the EVENT library is available])
+ fi
+
+ CPPFLAGS="$CPPFLAGS_SAVED"
+ LDFLAGS="$LDFLAGS_SAVED"
+fi
+
+])