[Buildroot] [PATCH] efibootmgr: backport upstream patch to fix build with gcc 6.x

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

Hello,

On Thu, 11 May 2017 09:48:02 +0200, Thomas Petazzoni wrote:
> efibootmgr was built with -fshort-wchar, which causes gcc to use
> 2-byte wchar_t instead of the normal 4-byte wchar_t. But this doesn't
> work anymore with gcc 6.x, as it causes a build failure:
> 
> /home/test/autobuild/run/instance-3/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-buildroot-linux-gnueabihf/6.3.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: warning: efibootmgr.o uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
> /home/test/autobuild/run/instance-3/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-buildroot-linux-gnueabihf/6.3.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: warning: efi.o uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
> /home/test/autobuild/run/instance-3/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-buildroot-linux-gnueabihf/6.3.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: warning: unparse_path.o uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
> 
> Upstream solution was do simply drop -fshort-wchar:
> 
>   https://github.com/rhinstaller/efibootmgr/commit/3466fd05c8c6f1052e0426d64eed40f8a88fd78f
> 
> So this commit simply backports this upstream patch.
> 
> Fixes:
> 
>   http://autobuild.buildroot.net/results/87c3ff2427331eb9ab31c9eb685fe80954a0a98f/
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> ---
>  package/efibootmgr/efibootmgr.hash | 1 +
>  package/efibootmgr/efibootmgr.mk   | 3 +++
>  2 files changed, 4 insertions(+)

Applied to master, thanks.

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