From f8d6453704b9b6f45f77aba7a43fb59ead229368 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 17 Apr 2014 23:50:20 +0000
Subject: [PATCH] configure.in: rb_cv_getcwd_malloc

* configure.in (rb_cv_getcwd_malloc): check if getcwd allocates
  buffer if NULL is given [ruby-core:62072] [Bug #9752]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45615 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog    |  5 +++++
 configure.in | 31 +++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 15be522d6a..05c14ea40c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Apr 18 08:50:18 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (rb_cv_getcwd_malloc): check if getcwd allocates
+	  buffer if NULL is given [ruby-core:62072] [Bug #9752]
+
 Thu Apr 17 16:28:10 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* prelude.rb: [DOC] Update Thread::exclusive docs by @stevenharman.
diff --git a/configure.in b/configure.in
index 5fbdb93843..18d58d85ea 100644
--- a/configure.in
+++ b/configure.in
@@ -2008,6 +2008,37 @@ AC_CHECK_FUNCS(utimes)
 AC_CHECK_FUNCS(wait4)
 AC_CHECK_FUNCS(waitpid)
 
+AS_IF([test "$ac_cv_func_getcwd" = yes], [
+    AC_CACHE_CHECK(if getcwd allocates buffer if NULL is given, [rb_cv_getcwd_malloc],
+	[AC_TRY_RUN([
+@%:@include <stddef.h>
+@%:@include <stdio.h>
+@%:@ifdef HAVE_UNISTD_H
+@%:@include <unistd.h>
+@%:@endif
+@%:@ifndef EXIT_SUCCESS
+@%:@define EXIT_SUCCESS 0
+@%:@endif
+@%:@ifndef EXIT_FAILURE
+@%:@define EXIT_FAILURE 1
+@%:@endif
+
+int
+main(int argc, char **argv)
+{
+    if (!getcwd(NULL, 0)) return EXIT_FAILURE;
+    return EXIT_SUCCESS;
+}
+],
+	    rb_cv_getcwd_malloc=yes,
+	    rb_cv_getcwd_malloc=no,
+	    AS_CASE($target_os,
+		[linux*|darwin*|*bsd|cygwin*|mingw*|mswin*],
+		[rb_cv_getcwd_malloc=yes],
+		[rb_cv_getcwd_malloc=no]))])
+    AS_IF([test "$rb_cv_getcwd_malloc" = no], [AC_DEFINE(NO_GETCWD_MALLOC, 1)])
+])
+
 AC_DEFUN([RUBY_CHECK_BUILTIN_FUNC], [dnl
 AC_CACHE_CHECK([for $1], AS_TR_SH(rb_cv_builtin_$1),
   [AC_LINK_IFELSE(