From: Jim Meyering <meyering@redhat.com>
Date: Wed, 31 Aug 2011 15:47:18 +0000 (+0200)
Subject: tests: avoid spurious assertion failure in test-float.c on ppc64
X-Git-Tag: stable/20110908~31
X-Git-Url: http://erislabs.net/gitweb/?p=gnulib.git;a=commitdiff_plain;h=395f9e6a19b504609aa8b0bd7f8cc55d4547d8dd

tests: avoid spurious assertion failure in test-float.c on ppc64

* tests/test-float.c (test_long_double): Comment out an assertion,
LDBL_MIN_EXP <= DBL_MIN_EXP, that is failing at least on PowerPC-64
with gcc-4.4.4.
(cherry picked from commit 9926b90d5159916a539b49359b3589fe89c2d987)
---

diff --git a/ChangeLog b/ChangeLog
index 682105717..eed8394ce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2011-08-31  Jim Meyering  <meyering@redhat.com>
+
+	tests: avoid spurious assertion failure in test-float.c on ppc64
+	* tests/test-float.c (test_long_double): Comment out an assertion,
+	LDBL_MIN_EXP <= DBL_MIN_EXP, that is failing at least on PowerPC-64
+	with gcc-4.4.4.
+
 2011-08-31  Bruno Haible  <bruno@clisp.org>
 
 	freopen: Documentation.
diff --git a/tests/test-float.c b/tests/test-float.c
index 530181306..57a472fae 100644
--- a/tests/test-float.c
+++ b/tests/test-float.c
@@ -298,7 +298,14 @@ test_long_double (void)
 
   /* Check that 'long double' is at least as wide as 'double'.  */
   ASSERT (LDBL_MANT_DIG >= DBL_MANT_DIG);
-  ASSERT (LDBL_MIN_EXP <= DBL_MIN_EXP);
+
+  /* Normally, we would also assert this:
+       ASSERT (LDBL_MIN_EXP <= DBL_MIN_EXP);
+     but at least on powerpc64 with gcc-4.4.4, it would fail:
+     $ :|gcc -dD -E -include stddef.h -|grep -E 'L?DBL_MIN_EXP'
+     #define __DBL_MIN_EXP__ (-1021)
+     #define __LDBL_MIN_EXP__ (-968)
+  */
   ASSERT (LDBL_MAX_EXP >= DBL_MAX_EXP);
 
   /* Check the value of LDBL_DIG.  */