http://bugs.gentoo.org/420599

--- configure.ac
+++ configure.ac
@@ -14,6 +14,8 @@
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES])
 
 dnl Checks for programs.
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
+
 AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_LD
@@ -39,7 +41,6 @@
 AC_EXEEXT
 
 dnl more automake stuff
-AM_C_PROTOTYPES
 
 dnl libtool
 AC_DISABLE_STATIC