-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
According to Bruno Haible on 9/13/2008 2:52 AM:
>> Meanwhile, I have a question about tests/test-signbit.c - your
>> patch changed most occurrences of -0.0L to -zerol, to work around one HP
>> bug, but there is another comment that states:
>>
>> /* We cannot use the expression '-zerol' here, because on HP-UX/hppa it
>> evaluates to 0.0L, not -0.0L. */
>> long double minus_zerol = -0.0L;
>
> Indeed, we're in a maze of twisty little HP cc compiler bugs:
> <http://lists.gnu.org/archive/html/bug-gnulib/2008-04/msg00179.html>
> <http://lists.gnu.org/archive/html/bug-gnulib/2008-08/msg00000.html>
minus_zerol is miscompiled on at least Irix 6.2. So until we hear
feedback from Jonathan on what DOES allow us to compile -0.0L on
HP-UX/hppa, I'd rather go for consistency in the testsuite by always using
- -zerol as the common idiom. If we later find a way to reliably work
around the HP-UX bug, it will then be a matter of grepping the source for
- -zerol and replacing it with a function call to a helper function (similar
to the NaNl() helper function in tests/nan.h). I'm committing this:
- --
Don't work too hard, make some time for fun as well!
Eric Blake [EMAIL PROTECTED]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (Cygwin)
Comment: Public key at home.comcast.net/~ericblake/eblake.gpg
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iEYEARECAAYFAkjqA60ACgkQ84KuGfSFAYCM6wCbBdZnvB6QuLS3ZREJgR5pvd8j
cT0AoJXK0nOb6AKY31vxcMT5dmhWV7Kq
=+TN4
-----END PGP SIGNATURE-----
>From 9374a8b4bcd3167f3bb4a068d0571dc9ef7b9d6e Mon Sep 17 00:00:00 2001
From: Eric Blake <[EMAIL PROTECTED]>
Date: Mon, 6 Oct 2008 06:23:12 -0600
Subject: [PATCH] test-signbit: avoid tripping Irix cc bug on -0.0L
* tests/test-signbit.c (minus_zerol): Delete, and replace with
'-zerol'. This may break on HP-UX/hppa, but at least makes the
entire testsuite consistent and avoids an Irix 6.2 bug.
Signed-off-by: Eric Blake <[EMAIL PROTECTED]>
---
ChangeLog | 7 +++++++
tests/test-signbit.c | 5 +----
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index e7db985..5345c11 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-10-06 Eric Blake <[EMAIL PROTECTED]>
+
+ test-signbit: avoid tripping Irix cc bug on -0.0L
+ * tests/test-signbit.c (minus_zerol): Delete, and replace with
+ '-zerol'. This may break on HP-UX/hppa, but at least makes the
+ entire testsuite consistent and avoids an Irix 6.2 bug.
+
2008-10-05 Bruno Haible <[EMAIL PROTECTED]>
Jim Meyering <[EMAIL PROTECTED]>
diff --git a/tests/test-signbit.c b/tests/test-signbit.c
index 30ba1b0..95ba613 100644
--- a/tests/test-signbit.c
+++ b/tests/test-signbit.c
@@ -39,9 +39,6 @@
float zerof = 0.0f;
double zerod = 0.0;
long double zerol = 0.0L;
-/* We cannot use the expression '-zerol' here, because on HP-UX/hppa it
- evaluates to 0.0L, not -0.0L. */
-long double minus_zerol = -0.0L;
static void
test_signbitf ()
@@ -143,7 +140,7 @@ test_signbitl ()
ASSERT (signbit (-2.718e-30L));
/* Zeros. */
ASSERT (!signbit (0.0L));
- if (1.0L / minus_zerol < 0)
+ if (1.0L / -zerol < 0)
ASSERT (signbit (-zerol));
else
ASSERT (!signbit (-zerol));
--
1.6.0.2
