Index: src/Makefile.in
--- src/Makefile.in.orig	2017-05-11 09:32:37.000000000 +0200
+++ src/Makefile.in	2025-11-22 20:20:08.891594000 +0100
@@ -388,7 +388,7 @@
 top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = foreign no-dependencies
 SUBDIRS = mans
-@COMPILER_IS_GCC_TRUE@AM_CFLAGS = -Wall -Werror
+@COMPILER_IS_GCC_TRUE@AM_CFLAGS =
 include_HEADERS = oping.h
 lib_LTLIBRARIES = liboping.la