From: Jonathan Wakely <jwakely@redhat.com>
To: Tulio Magno Quites Machado Filho <tuliom@ascii.art.br>
Cc: Michael Meissner <meissner@linux.ibm.com>,
libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org,
Bill Schmidt <wschmidt@linux.ibm.com>,
David Edelsohn <dje.gcc@gmail.com>,
Segher Boessenkool <segher@kernel.crashing.org>,
Peter Bergner <bergner@linux.ibm.com>
Subject: Re: [PATCH] libstdc++: Add C++ runtime support for new 128-bit long double format
Date: Thu, 10 Dec 2020 16:14:15 +0000 [thread overview]
Message-ID: <20201210161415.GA2309743@redhat.com> (raw)
In-Reply-To: <20201204003542.GC2309743@redhat.com>
On 04/12/20 00:35 +0000, Jonathan Wakely wrote:
>On 03/12/20 20:07 -0300, Tulio Magno Quites Machado Filho via Libstdc++ wrote:
>>Jonathan Wakely via Libstdc++ <libstdc++@gcc.gnu.org> writes:
>>
>>>diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
>>>index cbfdf4c6bad..d25842fef35 100644
>>>--- a/libstdc++-v3/configure.ac
>>>+++ b/libstdc++-v3/configure.ac
>>>@@ -421,12 +425,43 @@ case "$target" in
>>> port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
>>> case "$target" in
>>> powerpc*-*-linux*)
>>>- LONG_DOUBLE_COMPAT_FLAGS="$LONG_DOUBLE_COMPAT_FLAGS -mno-gnu-attribute" ;;
>>>+ LONG_DOUBLE_COMPAT_FLAGS="$LONG_DOUBLE_COMPAT_FLAGS -mno-gnu-attribute"
>>>+ # Check for IEEE128 support in libm:
>>>+ AC_CHECK_LIB(m, frexpf128,
>>
>>I suggest to replace frexpf128 with __frexpieee128.
>>
>>The former is available on a glibc that support _Float128 (since glibc 2.26).
>>The later is available on a glibc that supports binary128 long double (since
>>glibc 2.32)
>
>Hmm, yes, you pointed me to __frexpieee128 a few months ago, but for
>some reason I either didn't switch to using it, or lost a patch when
>squashing and rebasing branches. Hopefully I just forgot to change it,
>but I'll double check to make sure I haven't left any work on an old
>branch. Thanks for suggesting it (again!)
As expected, it still works with a check for __frexpieee128 instead.
So are you happy for me to push this to master with that change?
(It won't be until Tuesday now, as I have some time off).
next prev parent reply other threads:[~2020-12-10 16:14 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-11 21:50 Jonathan Wakely
2020-11-30 21:30 ` Michael Meissner
2020-12-01 15:10 ` Jonathan Wakely
2020-12-01 16:04 ` Jonathan Wakely
2020-12-01 19:10 ` Michael Meissner
2020-12-01 21:10 ` Jonathan Wakely
2020-12-01 21:41 ` Jonathan Wakely
[not found] ` <20201201222501.GA18971@ibm-toto.the-meissners.org>
2020-12-01 22:36 ` Jonathan Wakely
2020-12-01 23:24 ` Michael Meissner
2020-12-02 15:14 ` Michael Meissner
2020-12-01 23:32 ` Michael Meissner
2020-12-03 23:07 ` Tulio Magno Quites Machado Filho
2020-12-04 0:35 ` Jonathan Wakely
2020-12-10 16:14 ` Jonathan Wakely [this message]
2020-12-10 17:14 ` Peter Bergner
2020-12-10 17:27 ` Jonathan Wakely
2020-12-15 0:57 ` Tulio Magno Quites Machado Filho
2020-11-30 23:29 ` Segher Boessenkool
2020-12-01 15:04 ` Jonathan Wakely
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