[PATCH] ARM: Don't define _SYS_AUXV_H in sysdep.h

[Will Newton]

On 12 September 2014 10:04, Joseph S. Myers <joseph@codesourcery.com> wrote:
> On Fri, 12 Sep 2014, Will Newton wrote:
>
>> sysdep.h was defining _SYS_AUXV_H in order to avoid an include guard check
>> in hwcap.h. Unfortunately it didn't undefine it so it could leak out into
>> code and caused a build failure with -Wimplicit-function-declaration
>> building tst-auxv on ARM.
>>
>> ChangeLog:
>>
>> 2014-09-11  Will Newton  <will.newton@linaro.org>
>>
>>       * sysdeps/unix/sysv/linux/arm/bits/hwcap.h: Check for
>>       _LINUX_ARM_SYSDEP_H include guard too.
>
> Rather than referring to a guard for an internal header in an installed
> header, I think it would be better to test for _LIBC there.

This approach (testing for the sysdep.h guard) is used in sparc and
powerpc at present. Testing _LIBC would work but
stdio-common/scanf15.c and stdio-common/scanf17.c both #undef _LIBC
and break things.

-- 
Will Newton
Toolchain Working Group, Linaro