linux-kernel - Re: [PATCH v2] x86, selftests: Add sigreturn

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Date:	Tue, 10 Mar 2015 05:57:25 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	X86 ML <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Shuah Khan <shuah.kh@...sung.com>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH v2] x86, selftests: Add sigreturn_32 selftest


* Andy Lutomirski <luto@...capital.net> wrote:

> On Mon, Mar 9, 2015 at 9:48 AM, Ingo Molnar <mingo@...nel.org> wrote:
> >
> > now I get this build failure:
> >
> > make[1]: Entering directory
> > '/home/mingo/tip/tools/testing/selftests/x86'
> > gcc -m32 -o sigreturn_32 -O2 -g -std=gnu99 -pthread -Wall  sigreturn.c -lrt -ldl
> > In file included from /usr/include/time.h:27:0,
> >                  from sigreturn.c:13:
> > /usr/include/features.h:374:25: fatal error: sys/cdefs.h: No such file or directory
> >  #  include <sys/cdefs.h>
> >                          ^
> > compilation terminated.
> > Makefile:18: recipe for target 'sigreturn_32' failed
> > make[1]: *** [sigreturn_32] Error 1
> 
> It builds for me on Ubuntu.
> 
> It looks like your 32-bit build setup is broken.  The line that's
> failing to compile is:
> 
> #include <time.h>
> 
> Are you missing 32-bit headers?  This test *can't* be run as a 64-bit binary.

Yeah, was a relatively fresh testbox, the magic incantation to get it 
to build there was:

  apt-get install gcc-multilib libc6-i386 libc6-dev-i386

On Fedora it's:

  yum install glibc-devel.*i686

Might make sense to include that in a README or so.

Thanks,

	Ingo
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