socket/option.c: accurate condition

* ext/socket/option.c (inspect_tcpi_msec): more accurate condition
  for TCPI msec member inspection function.
  [ruby-core:74388] [Bug #12185]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54139 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Thu Mar 17 11:36:27 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/socket/option.c (inspect_tcpi_msec): more accurate condition
+	  for TCPI msec member inspection function.
+	  [ruby-core:74388] [Bug #12185]
+
 Thu Mar 17 08:13:43 2016  Rei Odaira  <Rei.Odaira@gmail.com>
 
 	* test/-ext-/time/test_new.rb (test_timespec_new): Time#gmtoff values

ext/socket/option.c

@@ -930,7 +930,12 @@ inspect_tcpi_usec(VALUE ret, const char *prefix, uint32_t t)
     rb_str_catf(ret, "%s%u.%06us", prefix, t / 1000000, t % 1000000);
 }
 
-#if defined(__linux__) || defined(__sun)
+#if !defined __FreeBSD__ && ( \
+    defined HAVE_STRUCT_TCP_INFO_TCPI_LAST_DATA_SENT || \
+    defined HAVE_STRUCT_TCP_INFO_TCPI_LAST_DATA_RECV || \
+    defined HAVE_STRUCT_TCP_INFO_TCPI_LAST_ACK_SENT  || \
+    defined HAVE_STRUCT_TCP_INFO_TCPI_LAST_ACK_RECV  || \
+    0)
 static void
 inspect_tcpi_msec(VALUE ret, const char *prefix, uint32_t t)
 {