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

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Date:	Mon, 9 Mar 2015 10:48:43 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Ingo Molnar <mingo@...nel.org>
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

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.

We could enable it to work as a 64-bit binary by merging this:

http://lkml.iu.edu/hypermail/linux/kernel/1407.1/03739.html

but it would still be nice to build the 32-bit version.  I could try
to rig up some makefile magic to skip building it if 32-bit headers
are missing.

--Andy

>
> :-/
>
> Thanks,
>
>         Ingo



-- 
Andy Lutomirski
AMA Capital Management, LLC
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