[ekiga] Accept to compile even if ptlib and opal try to disable exceptions

[Julien Puydt <jpuydt src gnome org>]

commit b8ea1fe8c15a4fa6a8bfde5e8b51febc74f8e529
Author: Julien Puydt <jpuydt free fr>
Date:   Sun Sep 15 21:19:59 2013 +0200

    Accept to compile even if ptlib and opal try to disable exceptions

 configure.ac |   24 ++++++------------------
 1 files changed, 6 insertions(+), 18 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index fb561a3..e09f897 100644
--- a/configure.ac
+++ b/configure.ac
@@ -730,24 +730,12 @@ if test "x$PTLIB_VIDEO" != "xyes"; then
   AC_MSG_ERROR([You need ptlib video support to compile ekiga])
 fi
 
-# check ptlib has been compiled with exceptions, which are mandatory
-# for boost's signals2
-AC_MSG_CHECKING([for exceptions in ptlib])
-CPPFLAGS_save="$CPPFLAGS"
-CPPFLAGS="$CPPFLAGS $PTLIB_CFLAGS"
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[try { } catch(...) { }]])],
-                 [
-                   AC_MSG_RESULT([yes])
-                   ptlib_exceptions=yes
-                 ],
-                 [
-                   AC_MSG_RESULT([no])
-                   ptlib_exceptions=no
-                 ])
-CPPFLAGS="$CPPFLAGS_save"
-if test "x$ptlib_exceptions" = "xno"; then
-   AC_MSG_ERROR([Sorry, but you must recompile PTLIB with --enable-exceptions])
-fi
+# Make sure ptlib and opal don't force no-exceptions,
+# as we need them for boost's signals2
+PTLIB_CFLAGS="$PTLIB_CFLAGS -fexceptions"
+AC_SUBST(PTLIB_CFLAGS)
+OPAL_CFLAGS="$OPAL_CFLAGS -fexceptions"
+AC_SUBST(OPAL_CFLAGS)
 
 SUFFIX=
 AC_ARG_ENABLE([opal-debug],