pipe: Set errno upon failure.

[gnulib.git] / m4 / strtod.m4

diff --git a/m4/strtod.m4 b/m4/strtod.m4
index 1f301c2..6b2d731 100644 (file)
--- a/m4/strtod.m4
+++ b/m4/strtod.m4
@@ -1,5 +1,5 @@
-# strtod.m4 serial 11
-dnl Copyright (C) 2002-2003, 2006-2009 Free Software Foundation, Inc.
+# strtod.m4 serial 13
+dnl Copyright (C) 2002-2003, 2006-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -50,8 +50,9 @@ numeric_equal (double x, double y)
        but mistakenly sets errno.  */
     const char *string = "inf";
     char *term;
+    double value;
     errno = 0;
-    double value = strtod (string, &term);
+    value = strtod (string, &term);
     if (value != HUGE_VAL || term != (string + 3) || errno)
       return 1;
   }
@@ -63,10 +64,18 @@ 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],
-       [gl_cv_func_strtod_works="guessing no"])])
+        [gl_cv_func_strtod_works=yes],
+        [gl_cv_func_strtod_works=no],
+        [gl_cv_func_strtod_works="guessing no"])])
     if test "$gl_cv_func_strtod_works" != yes; then
       REPLACE_STRTOD=1
       gl_PREREQ_STRTOD