[ekiga] Really stop configure when boost signals aren't found

[Julien Puydt <jpuydt src gnome org>]

commit 86de7f7ebc93b68e65311256b46781c49a49d628
Author: Julien Puydt <jpuydt gnome org>
Date:   Wed Sep 9 14:14:08 2009 +0200

    Really stop configure when boost signals aren't found
    
    Damien noticed that it was still going on!

 configure.ac |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 62f53cf..75367e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -192,6 +192,11 @@ dnl   Mandatory BOOST support
 dnl ###############################
 AX_BOOST_BASE([1.34])
 AX_BOOST_SIGNALS
+
+if test "x${ax_cv_boost_signals}" == "xno"; then
+   AC_MSG_ERROR(You need the boost signals library to compile ekiga)
+fi
+
 BOOST_LIBS="${BOOST_SIGNALS_LIB}"
 AC_SUBST(BOOST_LIBS)