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Detect Libevent version at configure time when using bufferevents

This commit is contained in:
Nick Mathewson 2010-09-27 13:24:19 -04:00
parent b7ae108e18
commit 21e5f3c431
1 changed files with 40 additions and 3 deletions
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43
configure.in
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@ -325,13 +325,50 @@ else
fi
AC_SUBST(TOR_LIBEVENT_LIBS)
dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
dnl we can do much better.
if test "$enable_bufferevents" = "yes" && test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
AC_MSG_ERROR([You've asked for bufferevent support, but you're using a version of Libevent without SSL support. This won't work. We need Libevent 2.0.3-alpha or later. If it isn't released yet, use Libevent from SVN, and talk to Nick.])
if test "$enable_bufferevents" = "yes" ; then
if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
AC_MSG_ERROR([You've asked for bufferevent support, but you're using a version of Libevent without SSL support. This won't work. We need Libevent 2.0.7-rc or later, and you don't seem to even have Libevent 2.0.3-alpha.])
else
CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
# Check for the right version. First see if version detection works.
AC_MSG_CHECKING([whether we can detect the Libevent version])
AC_COMPILE_IFELSE([
#include <event2/event.h>
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
#error
int x = y(zz);
#else
int x = 1;
#endif
], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
[event_version_number_works=no; AC_MSG_RESULT([no])])
if test "$event_version_number_works" != 'yes'; then
AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
else
AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
AC_COMPILE_IFELSE([
#include <event2/event.h>
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000700
#error
int x = y(zz);
#else
int x = 1;
#endif
], [ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents. We require 2.0.7-rc or later]) ] )
fi
fi
fi
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"
AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
if test "$enable_bufferevents" = "yes"; then
AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])