--- diffutils-3.8/m4/threadlib.m4.orig	2021-12-29 09:21:24.516000000 +0100
+++ diffutils-3.8/m4/threadlib.m4	2021-12-29 09:21:40.882799400 +0100
@@ -101,6 +101,9 @@
 #pragma weak fputs
 int main ()
 {
+#ifdef __CYGWIN__
+  return 1;
+#endif
   return (fputs == NULL);
 }]])],
          [gl_cv_have_weak=yes],