diff -up ./configure.in.orig ./configure.in
--- ./configure.in.orig	2013-03-25 11:56:12.588450042 -0400
+++ ./configure.in	2013-03-25 11:56:19.723645454 -0400
@@ -14,6 +14,7 @@ dnl AC_CHECK_YACC
 dnl Checks for programs.
 AC_PROG_INSTALL
 AC_PROG_CC
+AM_PROG_CC_C_O
 AC_EXEEXT
 AM_PROG_LEX
 AM_CONDITIONAL(USING_LEX, test "x$LEX" = "xlex")