Re: [PATCH v2] x86, selftests: Add sigreturn_32 selftest
From: Andy Lutomirski
Date: Tue Mar 10 2015 - 09:18:27 EST
On Mon, Mar 9, 2015 at 9:57 PM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> * Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
>> On Mon, Mar 9, 2015 at 9:48 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>> > now I get this build failure:
>> > make: 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: *** [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.
I could rig up the makefile to give that hint.
Should we just say that selftests/x86 won't work if you can't build
32-bit binaries, or should we try to degrade more gracefully?
AMA Capital Management, LLC
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