diff --git a/configure.in b/configure.ac
similarity index 90%
rename from configure.in
rename to configure.ac
index 3ad98ca11da..8fad378faf4 100644
--- a/configure.in
+++ b/configure.ac
@@ -1,13 +1,8 @@
 AC_INIT(interface/interface.c)
 
-cp $srcdir/configure.guess $srcdir/config.guess
-cp $srcdir/configure.sub $srcdir/config.sub
-
 AC_CANONICAL_HOST
 
-if test -z "$CC"; then
-	AC_PROG_CC	
-fi
+AC_PROG_CC
 AC_PROG_RANLIB
 AC_CHECK_PROG(AR,ar,ar)
 AC_CHECK_PROG(INSTALL,install,install)