AC_MSG_ERROR([gconftool-2 executable not found in your path - should be installed with GConf])
fi
+dnl ================== portability checks ===========================================
+
+dnl for backtrace()
+AC_CHECK_HEADERS([execinfo.h])
+
dnl ================== ggv checks ===================================================
AC_ARG_WITH(gs-pkg,
[ --with-gs=dir Directory Where GhostScript package is installed.])