From: tg@gmplib.org (Torbjörn Granlund)
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: Guix-devel <Guix-devel@gnu.org>, gmp-bugs@gmplib.org
Subject: Re: GMP 6.1.0 without assembly lacks ‘__gmpn_invert_lib’ on ARM
Date: Wed, 16 Dec 2015 14:02:19 +0100 [thread overview]
Message-ID: <86h9ji1r8k.fsf@shell.gmplib.org> (raw)
In-Reply-To: <877fkeaaxd.fsf@gnu.org> ("Ludovic Courtès"'s message of "Wed\, 16 Dec 2015 12\:29\:50 +0100")
ludo@gnu.org (Ludovic Courtès) writes:
When GMP 6.1.0 is built with --host=none-unknown-linux-gnueabihf on
ARMv7 (the way GCC configures its in-tree GMP, as of GCC 4.9.3),
‘__gmpn_invert_lib’ is missing from the resulting libgmp.a.
--8<---------------cut here---------------start------------->8---
$ nm /gnu/store/v6ipb4br8h6sy9zc82aj464cjcgnv7gl-gmp-6.1.0/lib/libgmp.a |grep __gmpn_invert_limb
nm: mp_clz_tab.o: no symbols
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
U __gmpn_invert_limb
00000000 T __gmpn_invert_limb
nm: repl-vsnprintf.o: no symbols
--8<---------------cut here---------------end--------------->8---
This seems to be expected, but then it looks as though <gmp-impl.h> was
erroneously referring to it, leading to undefined references, as
reported at <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67728>.
I've tried to reproduce this on two different ARM systems, and failed.
I cannot reproduce any link errors, nor can I find the reference or
definitions of the symbol __gmpn_invert_limb.
It also puzzles me that you would get link errors given that
__gmpn_invert_limb is defined in your libgmp.a.
Note also that using "none" as CPU is deprecated and outputs a warning.
Many strange things indeed.
--
Torbjörn
Please encrypt, key id 0xC8601622
next prev parent reply other threads:[~2015-12-16 13:02 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-16 11:29 GMP 6.1.0 without assembly lacks ‘__gmpn_invert_lib’ on ARM Ludovic Courtès
2015-12-16 13:02 ` Torbjörn Granlund [this message]
2015-12-16 22:39 ` Ludovic Courtès
2015-12-17 1:07 ` Torbjörn Granlund
2015-12-17 21:45 ` Christopher Allan Webber
2015-12-17 21:48 ` On being welcoming Ludovic Courtès
2015-12-18 4:25 ` Mike Mohr
2015-12-18 15:51 ` Niels Möller
2015-12-18 19:04 ` Torbjörn Granlund
2015-12-19 17:21 ` Mike Mohr
[not found] ` <nn1tajiwlk.fsf@armitage.lysator.liu.se>
2015-12-18 19:09 ` Christopher Allan Webber
2015-12-18 10:01 ` Niels Möller
[not found] ` <nnlh8shy7c.fsf@armitage.lysator.liu.se>
2015-12-18 14:45 ` Ludovic Courtès
[not found] ` <87mvt7lsrm.fsf@gnu.org>
2015-12-18 15:29 ` Niels Möller
2015-12-18 16:53 ` Christopher Allan Webber
2015-12-18 23:14 ` GMP 6.1.0 without assembly lacks ‘__gmpn_invert_lib’ on ARM Ludovic Courtès
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