From c5ffd3b2dff17657cd0c7ab426a972f1fbfbae6c Mon Sep 17 00:00:00 2001
From: shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 25 Feb 2009 06:06:08 +0000
Subject: merge revision(s) 21505: 	* ext/socket/extconf.rb
 (gai_strerror): checks if available and if 	  returns const pointer. 
 * ext/socket/getaddrinfo.c (gai_strerror): defines only if non 	 
 available.  [ruby-core:21328]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@22619 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/socket/extconf.rb    | 13 +++++++++++++
 ext/socket/getaddrinfo.c |  9 +++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)

(limited to 'ext/socket')

diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 8a13ddba73..ece615865f 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -259,6 +259,19 @@ unless getaddr_info_ok and have_func("getnameinfo", "netdb.h") and have_func("ge
   have_func("inet_ntop") or have_func("inet_ntoa")
   have_func("inet_pton") or have_func("inet_aton")
   have_func("getservbyport")
+  if have_func("gai_strerror")
+    unless checking_for("gai_strerror() returns const pointer") {!try_compile(<<EOF)}
+#{cpp_include(headers)}
+#include <stdlib.h>
+void
+conftest_gai_strerror_is_const()
+{
+    *gai_strerror(0) = 0;
+}
+EOF
+      $defs << "-DGAI_STRERROR_CONST"
+    end
+  end
   have_header("arpa/nameser.h")
   have_header("resolv.h")
 end
diff --git a/ext/socket/getaddrinfo.c b/ext/socket/getaddrinfo.c
index 9fb4ebcb06..9b82296dba 100644
--- a/ext/socket/getaddrinfo.c
+++ b/ext/socket/getaddrinfo.c
@@ -39,6 +39,9 @@
  */
 
 #include "config.h"
+#ifdef RUBY_EXTCONF_H
+#include RUBY_EXTCONF_H
+#endif
 #include <sys/types.h>
 #if !defined(_WIN32) && !defined(__VMS)
 #include <sys/param.h>
@@ -199,7 +202,8 @@ if (pai->ai_flags & AI_CANONNAME) {\
 
 #define ERR(err) { error = (err); goto bad; }
 
-#if defined __UCLIBC__
+#ifndef HAVE_GAI_STRERROR
+#ifdef GAI_STRERROR_CONST
 const
 #endif
 char *
@@ -210,6 +214,7 @@ gai_strerror(ecode)
 		ecode = EAI_MAX;
 	return (char *)ai_errlist[ecode];
 }
+#endif
 
 void
 freeaddrinfo(ai)
@@ -388,7 +393,7 @@ getaddrinfo(hostname, servname, hints, res)
 			port = htons((unsigned short)atoi(servname));
 		} else {
 			struct servent *sp;
-			char *proto;
+			const char *proto;
 
 			proto = NULL;
 			switch (pai->ai_socktype) {
-- 
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