--- configure.ac.orig	2018-07-15 08:54:28 UTC
+++ configure.ac
@@ -15,7 +15,7 @@ AC_CONFIG_HEADERS([config.h])
 AC_PROG_CC
 AC_PROG_INSTALL
 
-AX_CFLAGS_WARN_ALL
+#AX_CFLAGS_WARN_ALL
 
 ## This PKG_CHECK_MODULES can be replaced by the following three
 ## AC_SEARCH_LIBSs and the non-Cygwin setting of AM_LDFLAGS and