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[tor-commits] [tor/master] Attempt to make openbsd compilation happier with libevent2 installed



commit 5dff4ae0ad5e2a1fb93ceae3446f0a315fbd8a3a
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Wed Nov 25 09:43:12 2015 -0500

    Attempt to make openbsd compilation happier with libevent2 installed
    
    Fix for bug 16651; patch from "rubiate".
---
 changes/bug16651 |    5 +++++
 configure.ac     |   21 +++++++++++++++++----
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/changes/bug16651 b/changes/bug16651
new file mode 100644
index 0000000..096daea
--- /dev/null
+++ b/changes/bug16651
@@ -0,0 +1,5 @@
+  o Minor bugfixes (compilation):
+
+    - Fix search for libevent libraries on OpenBSD (and similar systems
+      which install libevent 1 and libevent 2 in parallel). Resolves
+      ticket 16651.  Patch from "rubiate".
diff --git a/configure.ac b/configure.ac
index 868ff55..82b933a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -501,9 +501,6 @@ AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
 AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
 
 LIBS="$save_LIBS"
-LDFLAGS="$save_LDFLAGS"
-CPPFLAGS="$save_CPPFLAGS"
-
 
 AM_CONDITIONAL(USE_EXTERNAL_EVDNS, test x$ac_cv_header_event2_dns_h = xyes)
 
@@ -514,9 +511,25 @@ if test "$enable_static_libevent" = "yes"; then
      TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
    fi
 else
-     TOR_LIBEVENT_LIBS="-levent"
+     if test x$ac_cv_header_event2_event_h = "xyes"; then
+       AC_SEARCH_LIBS(event_new, [event event_core])
+       AC_SEARCH_LIBS(evdns_base_new, [event event_extra])
+
+       if test $ac_cv_search_event_new != "none required"; then
+         TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
+       fi
+       if test $ac_cv_search_evdns_base_new != "none required"; then
+         TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
+       fi
+     else
+       TOR_LIBEVENT_LIBS="-levent"
+     fi
 fi
 
+LIBS="$save_LIBS"
+LDFLAGS="$save_LDFLAGS"
+CPPFLAGS="$save_CPPFLAGS"
+
 dnl This isn't the best test for Libevent 2.0.3-alpha.  Once it's released,
 dnl we can do much better.
 if test "$enable_bufferevents" = "yes" ; then

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