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Re: GDB 8.1 build error

From: Pedro Alves <palves at redhat dot com>
To: Simon Marchi <simon dot marchi at polymtl dot ca>
Cc: Paul Koning <paulkoning at comcast dot net>, gdb at sourceware dot org
Date: Fri, 27 Apr 2018 21:00:45 +0100
Subject: Re: GDB 8.1 build error
References: <214C80CC-1173-41F6-AAA1-39C9D39E28B2@comcast.net> <454707570722fc0220074c0eca015a8f@polymtl.ca> <D029885B-D093-4416-9957-371E3D08495E@comcast.net> <c744d369-801b-c29f-dd3d-961c57ebec74@redhat.com> <e687057d79e17944e9a77912fd22bac0@polymtl.ca>

On 04/27/2018 08:18 PM, Simon Marchi wrote:
> On 2018-04-27 15:08, Pedro Alves wrote:
>> Oh, wait....  Your build line has no "-W" at all, it has "-w" instead??
>> How did that happen?
> 
> When --disable-build-warnings is used, we don't put any -W/-Wno- flags:
> 
> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=gdb/warning.m4;h=f176a3291aa68acf0122609531abb4652425525b;hb=HEAD#l62

But then, we add "-w", and I'm surprised that "-w" did not disable
all warnings, including "-Wc++11-narrowing".  "-w" is supposed to mean
disable all warnings.  At least, that's how GCC behaves.
Could that be a clang bug?

Thanks,
Pedro Alves

Follow-Ups:
- Re: GDB 8.1 build error
  - From: Simon Marchi

References:
- GDB 8.1 build error
  - From: Paul Koning
- Re: GDB 8.1 build error
  - From: Simon Marchi
- Re: GDB 8.1 build error
  - From: Paul Koning
- Re: GDB 8.1 build error
  - From: Pedro Alves
- Re: GDB 8.1 build error
  - From: Simon Marchi

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