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Re: ToT build problem with nextafterl/nexttowardl (when using ToT GCC)
- From: Steve Ellcey <sellcey at cavium dot com>
- To: libc-alpha <libc-alpha at sourceware dot org>
- Cc: Martin Sebor <msebor at gmail dot com>
- Date: Fri, 08 Dec 2017 11:22:27 -0800
- Subject: Re: ToT build problem with nextafterl/nexttowardl (when using ToT GCC)
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I have tracked the glibc build problem down to this GCC patch:
+2017-12-07 Martin Sebor <msebor@redhat.com>
+
+ PR c/81544
+ * attribs.c (empty_attribute_table): Initialize new member of
(many more lines)
But I am not sure if this is a bug with the patch or an issue with the
glibc sources where there is an inconsistency in how these two
functions are declared.
Steve Ellcey
sellcey@cavium.com
On Fri, 2017-12-08 at 08:51 -0800, Steve Ellcey wrote:
> Is anyone else seeing this problem when building glibc. I am using
> the
> ToT GCC to build ToT glibc.
>
> Steve Ellcey
> sellcey@cavium.com
>
>
>
> In file included from ../include/bits/mathcalls.h:1,
> from ../math/math.h:350,
> from ../include/math.h:7,
> from ../sysdeps/aarch64/fpu/s_llround.c:19:
> ../math/bits/mathcalls.h:259:1: error: ignoring attribute ‘const’ in
> declaration of a built-in function ‘nextafterl’ because it conflicts
> with attribute ‘pure’ [-Werror=attributes]
> __MATHCALLX (nextafter,, (_Mdouble_ __x, _Mdouble_ __y),
> (__const__));
> ^~~~~~~~~~~
> <built-in>: note: previous declaration here
> ../math/bits/mathcalls.h:261:1: error: ignoring attribute ‘const’ in
> declaration of a built-in function ‘nexttowardl’ because it conflicts
> with attribute ‘pure’ [-Werror=attributes]
> __MATHCALLX (nexttoward,, (_Mdouble_ __x, long double __y),
> (__const__));
> ^~~~~~~~~~~
> <built-in>: note: previous declaration here