[Buildroot] [PATCH v2] util-linux: fix ncurses/wchar handling (again)

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Fri, 13 Jan 2017 08:03:53 -0200, Carlos Santos wrote:
> util-linux #defines "wchar_t" as "char" when configured without widechar
> support. This conflicts with definition of wchar_t contained in stddef.h,
> so the compilation fails with
> 
>     error: two or more data types in declaration specifiers
>     #define
>      wchar_t char
> 
> The error can be avoided by rearranging the inclusion order in some files
> under the text-utils directory.
> 
> Fixes:
> 
>   http://autobuild.buildroot.net/results/3a2f228e0fa7b5cc28a13d49f48f1a6aef8d9d7a
>   http://autobuild.buildroot.net/results/99e96069f652d511c6212a5bb6be29e68fb1747c
>   http://autobuild.buildroot.net/results/2dc5721aef93b7b410153bafad78248fac3db941
> 
> Signed-off-by: Carlos Santos <casantos@datacom.ind.br>

I tried to fix the same problem in commit
5a18eabdf08564688761a9b2f35892d69d8f9a18, but apparently failed at
taking into account all the possible situations.

So if we are going to merge a different solution, I'd like to see an
investigation of whether commit
5a18eabdf08564688761a9b2f35892d69d8f9a18 is still needed or not. If
it's not, then it should be reverted as well.

I must say I find the fix of playing with the ordering of includes to
be somewhat hackish. Do we have a better solution? Is it really legal
for util-linux to redefine wchar_t? Should it use a better autoconf
check before doing this?

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com