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From: Richard Weinberger <richard@nod.at>
To: Lorenzo Colitti <lorenzo@google.com>,
	Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
Cc: Thomas Meyer <thomas@m3y3r.de>,
	"user-mode-linux-devel@lists.sourceforge.net"
	<user-mode-linux-devel@lists.sourceforge.net>
Subject: Re: [uml-devel] [PATCH v4] um: Switch clocksource to hrtimers
Date: Wed, 18 Nov 2015 09:06:30 +0100	[thread overview]
Message-ID: <564C3186.60803@nod.at> (raw)
In-Reply-To: <CAKD1Yr0uNgTk90J00URiaxaWgeDB6rxUA7+Osy1-macXz3dQ_Q@mail.gmail.com>

Am 18.11.2015 um 08:10 schrieb Lorenzo Colitti:
> On Wed, Nov 18, 2015 at 4:00 PM, Anton Ivanov
> <anton.ivanov@kot-begemot.co.uk> wrote:
>> It is.
>>
>> You need -lrt to link in HR timers. However, the original patch should add
>> that to the library list. I need to understand why it does not in the dm
>> tree.
> 
> I noticed that command already does contain "-lrt", just in a
> different place. It starts off with:
> 
> gcc -Wl,-rpath,/lib64 -m64 -Wl,-rpath,/lib -Wl,--wrap,malloc
> -Wl,--wrap,free -Wl,--wrap,calloc -Wl,-m -Wl,elf_x86_64 -lrt <...>
> 
> That command line doesn't work, but if you remove the -lrt and put it
> at the end of the line, it starts working. Is the order significant?
> Or is it a bug in GCC's command line parsing?

The order matters.
-lrt has to be placed after all object files which need the rt library.
Can you double check whether this is the case?

Thanks,
//richard

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  reply	other threads:[~2015-11-18  8:06 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-02 16:16 [uml-devel] [PATCH v4] um: Switch clocksource to hrtimers Anton Ivanov
2015-11-02 21:50 ` Richard Weinberger
2015-11-02 22:13   ` Anton Ivanov
2015-11-03  7:11     ` Anton Ivanov
2015-11-03  7:58       ` Thomas Meyer
2015-11-06 21:56 ` Richard Weinberger
2015-11-07 10:29   ` Anton Ivanov
2015-11-07 10:32     ` Richard Weinberger
2015-11-18  1:20   ` Lorenzo Colitti
2015-11-18  7:00     ` Anton Ivanov
2015-11-18  7:10       ` Lorenzo Colitti
2015-11-18  8:06         ` Richard Weinberger [this message]
2015-11-18 13:32           ` Lorenzo Colitti
2015-11-18 13:40             ` Richard Weinberger

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