--- a/configure.ac
+++ b/configure.ac
@@ -427,7 +427,7 @@
 AC_CHECK_PROG(PERL, perl, perl)
 
 ## this should come after `AC_PROG_CC'
-set_more_warnings=yes
+set_more_warnings=no
 if test "$GCC" = yes -a "x$set_more_warnings" != xno; then
 	dnl Clang needs this option, or else it will appear to support any
 	dnl warning option, only to spew warnings about them later.
