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Date: Thu, 26 Feb 2015 17:03:00 -0000
Message-ID: <CADtEn-3Bg+ByB0bWyBodqa6V8QwHCoYsoFY_Eemmh0nNAwwLgw@mail.gmail.com>
Subject: Re: many unused function warnings in gdb 7.9 on darwin
From: Jack Howarth <howarth.mailing.lists@gmail.com>
To: Pedro Alves <palves@redhat.com>
Cc: "gdb@sourceware.org" <gdb@sourceware.org>
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Filed http://llvm.org/bugs/show_bug.cgi?id=22712 on this issue.
            Jack

On Thu, Feb 26, 2015 at 5:17 AM, Pedro Alves <palves@redhat.com> wrote:
> On 02/24/2015 04:33 PM, Jack Howarth wrote:
>>    Building the gdb 7.9 release on x86_64-apple-darwin14 produces many
>> warnings of the form...
>>
>> remote.c:2567:1: warning: unused function
>> 'VEC_thread_item_t_embedded_size' [-Wunused-function]
>> DEF_VEC_O(thread_item_t);
>> ^
>> ./common/vec.h:435:20: note: expanded from macro 'DEF_VEC_O'
>> VEC_T(T);                                                                 \
>>                                                                           ^
>> ./common/vec.h:863:22: note: expanded from macro '\
>> DEF_VEC_FUNC_O'
>> static inline size_t VEC_OP (T,embedded_size)                             \
>>                      ^
>> ./common/vec.h:399:22: note: expanded from macro 'VEC_OP'
>> #define VEC_OP(T,OP) VEC_##T##_##OP
>>                      ^
>> <scratch space>:55:1: note: expanded from here
>> VEC_thread_item_t_embedded_size
>> ^
>>
>> Shouldn't those VEC declarations use a wrapper to avoid them on
>> targets not supporting that code?
>
> AFAIK, -Wunused-function is supposed to be suppressed for
> "static inline" functions:
>
>  -Wunused-function
>      Warn whenever a static function is declared but not defined
>      or a non-inline static function is unused. This warning is
>      enabled by -Wall.
>
> Looks like a clang bug here?
>
> (I suspect marking the function with attribute used would
> work around this.)
>
> Thanks,
> Pedro Alves
>