diff -Naur wol-0.7.1-orig/configure.ac wol-0.7.1/configure.ac
--- wol-0.7.1-orig/configure.ac	2024-12-25 13:52:38.209314369 +0900
+++ wol-0.7.1/configure.ac	2024-12-25 14:49:28.351829162 +0900
@@ -60,6 +60,14 @@
 dnl check data types
 AC_CHECK_SIZEOF(unsigned char, 1)
 
+
+dnl config.h.in defines defaults
+AC_DEFINE([HAVE_STRUCT_ETHER_ADDR], 0, [struct ether_addr])
+AC_DEFINE([HAVE_STRUCT_ETHER_ADDR_ETHER_ADDR_OCTET], 0, [struct ether_addr.ether_addr_octet])
+AC_DEFINE([HAVE_STRUCT_ETHER_ADDR_OCTET], 0, [struct ether_addr.octet])
+AC_DEFINE([HAVE_ETHER_HOSTTON], 0, [ether_hostton])
+
+
 ether_includes=""
 AC_CHECK_TYPE([struct ether_addr], , , [#include <netinet/ether.h>]) dnl Linux
 if test "$ac_cv_type_struct_ether_addr" = "yes"; then
@@ -241,13 +249,6 @@
 dnl fi
 
 
-dnl config.h.in defines
-AC_DEFINE([HAVE_STRUCT_ETHER_ADDR], 0, [struct ether_addr])
-AC_DEFINE([HAVE_STRUCT_ETHER_ADDR_ETHER_ADDR_OCTET], 0, [struct ether_addr.ether_addr_octet])
-AC_DEFINE([HAVE_STRUCT_ETHER_ADDR_OCTET], 0, [struct ether_addr.octet])
-AC_DEFINE([HAVE_ETHER_HOSTTON], 0, [ether_hostton])
-
-
 dnl full featured warnings
 CFLAGS="$CFLAGS -W -Wall -Wpointer-arith -Wimplicit-function-declaration"
 
diff -Naur wol-0.7.1-orig/m4/getline.m4 wol-0.7.1/m4/getline.m4
--- wol-0.7.1-orig/m4/getline.m4	2024-12-25 17:22:11.442627544 +0900
+++ wol-0.7.1/m4/getline.m4	2024-12-25 19:50:39.282552640 +0900
@@ -27,7 +27,7 @@
       if (!in)
 	return 1;
       len = getline (&line, &siz, in);
-      exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
+      return (len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1;
     }
     ], am_cv_func_working_getline=yes dnl The library version works.
     , am_cv_func_working_getline=no dnl The library version does NOT work.
diff -Naur wol-0.7.1-orig/m4/malloc.m4 wol-0.7.1/m4/malloc.m4
--- wol-0.7.1-orig/m4/malloc.m4	2024-12-25 13:52:38.182314099 +0900
+++ wol-0.7.1/m4/malloc.m4	2024-12-25 14:31:34.627556193 +0900
@@ -14,7 +14,7 @@
 
  AC_CACHE_CHECK([for working malloc], jm_cv_func_working_malloc,
   [AC_TRY_RUN([
-    char *malloc ();
+    #include <stdlib.h>
     int
     main ()
     {
diff -Naur wol-0.7.1-orig/m4/realloc.m4 wol-0.7.1/m4/realloc.m4
--- wol-0.7.1-orig/m4/realloc.m4	2024-12-25 13:52:38.185314129 +0900
+++ wol-0.7.1/m4/realloc.m4	2024-12-25 14:36:55.421560103 +0900
@@ -14,7 +14,7 @@
 
  AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc,
   [AC_TRY_RUN([
-    char *realloc ();
+    #include <stdlib.h>
     int
     main ()
     {