From c3e05262697f64218259b63acfd6933958c62eae Mon Sep 17 00:00:00 2001
From: nari <nari@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 8 Jul 2011 05:39:50 +0000
Subject: [PATCH] * configure.in: can't subtract void *.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32450 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog    |  4 ++++
 configure.in | 10 +++++-----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 7fcc45f3be..11aa0d4721 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Jul  8 14:29:47 2011  Narihiro Nakamura  <authornari@gmail.com>
+
+	* configure.in: can't subtract void *.
+
 Fri Jul  8 14:33:26 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* win32/Makefile.sub (config.h): define GC_MARK_STACKFRAME_WORD.
diff --git a/configure.in b/configure.in
index 81bc57eeb2..5129e7944d 100644
--- a/configure.in
+++ b/configure.in
@@ -1235,7 +1235,7 @@ AC_CACHE_CHECK(for gc_mark and gc_children stack frame approximate size(word), r
 CFLAGS="-O0"
 AC_TRY_RUN([
 int word;
-void *stack_start;
+char *stack_start;
 
 void
 set_stackframe_word()
@@ -1243,11 +1243,11 @@ set_stackframe_word()
     int dumy = 42;
     int diff;
 
-    if (stack_start < (void *)&dumy) {
-        diff = (int)((void *)&dumy - stack_start);
+    if (stack_start < (char *)&dumy) {
+        diff = (int)((char *)&dumy - stack_start);
     }
     else {
-        diff = (int)(stack_start - (void *)&dumy);
+        diff = (int)(stack_start - (char *)&dumy);
     }
     word = (diff/sizeof(void *));
     if ((diff % sizeof(void *)) != 0) {
@@ -1275,7 +1275,7 @@ int
 main() {
   int dumy = 42;
 
-  stack_start = (void *)&dumy;
+  stack_start = (char *)&dumy;
   gc_mark(0, 0, 255);
   return word;
 }