--- cloog-0.20.0/configure.ac~	2018-09-07 16:04:19.000000000 +0200
+++ cloog-0.20.0/configure.ac	2022-02-16 09:47:30.458783161 +0100
@@ -75,7 +75,6 @@
 AC_CHECK_PROG(TEXI2DVI, texi2dvi, texi2dvi, [])
 AM_CONDITIONAL(HAVE_TEXI2DVI, test -n "$TEXI2DVI")
 
-AX_CC_MAXOPT
 AC_SUBST(CFLAGS_WARN)
 AX_CFLAGS_WARN_ALL(CFLAGS_WARN)