[Buildroot] [PATCH 6/7] package/gcc: enable float128 on powerpc64le with glibc >= 2.26 toolchains

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

Hello,

On Sun, 27 Aug 2017 19:36:05 +0200, Romain Naour wrote:
> float128 is now required on powerpc64le with glibc >= 2.26 toolchains.
> 
> Fixes:
> running configure fragment for sysdeps/gnu
> running configure fragment for sysdeps/powerpc/powerpc64le
> checking if [...]powerpc64le-buildroot-linux-gnu-gcc supports binary128 floating point type... no
> checking if the target machine is at least POWER8... yes
> configure: error: ***  binary128 floating point type (GCC >= 6.2) is required on powerpc64le.
> 
> In order to prepare the glibc bump to this version, we enable
> binary128 floating point in gcc. This require at least gcc >= 6.2.
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
>  package/gcc/gcc.mk | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk
> index 49ccccf..54ef70c 100644
> --- a/package/gcc/gcc.mk
> +++ b/package/gcc/gcc.mk
> @@ -254,6 +254,14 @@ HOST_GCC_COMMON_CONF_OPTS += \
>  	--without-long-double-128
>  endif
>  
> +# Since glibc >= 2.26, poerpc64le requires double/long double which

Typo: powerpc64le.

> +# requires at least gcc 6.2.
> +# See sysdeps/powerpc/powerpc64le/configure.ac
> +ifeq ($(BR2_TOOLCHAIN_USES_GLIBC)$(BR2_TOOLCHAIN_GCC_AT_LEAST_6)$(BR2_powerpc64le),yyy)

So what happens if I build a gcc 5.x / glibc 2.26 / powerpc64le
toolchain ?

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