From: Eric Blake <ebb9@byu.net>
Date: Fri, 6 Nov 2009 03:48:01 +0000 (-0700)
Subject: strtod: detect darwin bug
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3bd281de635470875cc6e5887a08bf37f0841890;p=pspp

strtod: detect darwin bug

* m4/strtod.m4 (gl_FUNC_STRTOD): Filter out darwin bug on "nan(".
Reported by Leo Davis.

Signed-off-by: Eric Blake <ebb9@byu.net>
---

diff --git a/ChangeLog b/ChangeLog
index 1635de2da9..23f8426668 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2009-11-05  Eric Blake  <ebb9@byu.net>
 
+	strtod: detect darwin bug
+	* m4/strtod.m4 (gl_FUNC_STRTOD): Filter out darwin bug on "nan(".
+	Reported by Leo Davis.
+
 	freopen-safer: new module
 	* modules/freopen-safer: New module.
 	* m4/stdio-safer.m4 (gl_FREOPEN_SAFER): New macro.
diff --git a/m4/strtod.m4 b/m4/strtod.m4
index 9769436cb2..3bc8770258 100644
--- a/m4/strtod.m4
+++ b/m4/strtod.m4
@@ -1,4 +1,4 @@
-# strtod.m4 serial 12
+# strtod.m4 serial 13
 dnl Copyright (C) 2002-2003, 2006-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -64,6 +64,14 @@ numeric_equal (double x, double y)
     if (numeric_equal (value, value) || term != (string + 5))
       return 1;
   }
+  {
+    /* darwin 10.6.1 misparses "nan(".  */
+    const char *string = "nan(";
+    char *term;
+    double value = strtod (string, &term);
+    if (numeric_equal (value, value) || term != (string + 3))
+      return 1;
+  }
 ]])],
 	[gl_cv_func_strtod_works=yes],
 	[gl_cv_func_strtod_works=no],