diff -r 7fbec6da8123 -r 066e557ac453 configure.ac
--- a/configure.ac	Mon Nov 17 11:36:20 2014 +0000
+++ b/configure.ac	Fri Apr 15 13:05:48 2016 +0100
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_INIT([plover],[0.5],[ali@juiblex.co.uk])
+AC_INIT([plover],[0.5.1],[ali@juiblex.co.uk])
 AC_PREREQ(2.59)
 AC_CONFIG_AUX_DIR([config])
 AC_CONFIG_SRCDIR([plover/plover.h])
@@ -70,9 +70,9 @@
 #   increment CURRENT and set AGE and REVISION to 0.
 # - If the interface is the same as the previous version, increment REVISION.
 #
-lt_current=3
+lt_current=4
 lt_revision=0
-lt_age=0
+lt_age=1
 LIBPLOVER_LT_VERSION_INFO="$lt_current:$lt_revision:$lt_age"
 AC_SUBST(LIBPLOVER_LT_VERSION_INFO)
 
@@ -88,6 +88,7 @@
 # Checks for programs.
 ##################################################
 AC_PROG_CC
+AC_PROG_CXX
 AC_LIBTOOL_WIN32_DLL
 AC_PROG_LIBTOOL
 PKG_PROG_PKG_CONFIG
@@ -163,6 +164,22 @@
 fi
 AC_SUBST([FETCH_LIBS])
 LIBS="$save_LIBS"
+AC_ARG_WITH([breakpad],
+  [AS_HELP_STRING([--with-breakpad],
+    [produce minidumps on crash @<:@default=check@:>@])],
+  [],[with_breakpad=check])
+if test "$with_breakpad" != no; then
+    PKG_CHECK_MODULES([BREAKPAD],[breakpad-client],
+      [have_breakpad="yes";REQUIREMENTS="$REQUIREMENTS x11"],[have_breakpad="no"])
+    if test "$have_breakpad" = yes; then
+	AC_DEFINE([HAVE_BREAKPAD],[1],[Define if breakpad is available.])
+    elif test "$with_breakpad" = yes; then
+	AC_MSG_ERROR([$BREAKPAD_PKG_ERRORS])
+    fi
+else
+    have_breakpad="no"
+fi
+AM_CONDITIONAL([HAVE_BREAKPAD],[test $have_breakpad = yes])
 
 ##################################################
 # Checks for library functions.