https://bugs.gentoo.org/375739
--- a/configure.in
+++ b/configure.in
@@ -24,2 +24,3 @@
 AC_PROG_RANLIB
+AM_PROG_AR
 
@@ -37,5 +38,2 @@
 
-CFLAGS=""
-CXXFLAGS=""
-
 if test "x$GCC" = xyes; then
@@ -52,10 +50,2 @@
 fi
-
-AC_ARG_ENABLE(optimize,
-[  --enable-optimize=level      Enable optimization [default=2]],
-        enable_optmize=$enableval, enable_optimize=2)
-if test "x$enable_optimize" != "xno" ; then
-        CFLAGS="$CFLAGS -O$enable_optimize"
-        CXXFLAGS="$CXXFLAGS -O$enable_optimize"
-fi