Add missing AM_PROG_CC_C_O to configure.ac.

diff --git a/configure.ac b/configure.ac
index 41ddc6c..5cdd642 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -18,6 +18,8 @@ AC_PROG_CC_C99
 AC_PROG_CPP
 AC_PROG_INSTALL
 
+AM_PROG_CC_C_O
+
 dnl Check and set OS
 
 AC_CANONICAL_HOST