From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH 1/2] daemon: Fix '--version'.
Date: Fri, 02 Sep 2016 14:41:37 +0200
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In-Reply-To: <87d1knazeh.fsf@gmail.com> (Alex Vong's message of "Fri, 02 Sep
	2016 09:00:54 +0800")
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To: Alex Vong <alexvong1995@gmail.com>
Cc: guix-devel@gnu.org

Alex Vong <alexvong1995@gmail.com> skribis:

> ludo@gnu.org (Ludovic Court=C3=A8s) writes:
>
>> Alex Vong <alexvong1995@gmail.com> skribis:
>>
> [...]
>>>
>>> I think you have isolated the problem! This test case does not work for
>>> me.
>>>
>>>
>>> I get the following output after building with
>>> (g++ -O2 -flto version.cxx):
>>
>> What if you compile with =E2=80=98gcc=E2=80=99 (and rename to foo.c) ins=
tead of =E2=80=98g++=E2=80=99?
>>
>> It might be a symbol visibility problem, or name mangling issue.
>>
>> Ludo=E2=80=99.
>
> Hmm, I try to build with 'gcc -O2 -flto version.c' and './a.out
> --version' still fails with 'unrecognized option'. I check the symbols
> using 'nm' and they are not mangled. How should I check for the sign of
> a symbol visibility problems?=20

=E2=80=98nm=E2=80=99 shows a capital T for exported symbols, and a lowercas=
e t for
hidden/private symbols.

Maybe you should report a bug against your distro=E2=80=99s package and see=
 what
they think?

Ludo=E2=80=99.