[Buildroot] [PATCH] package/gcc: add support for gcc 8.1

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Hello Romain,

Thanks for working on this!

On Sat,  5 May 2018 12:58:44 +0200, Romain Naour wrote:
> Remove 0860-cilk-fix-build-without-wchar.patch since cilk has
> been removed from gcc.
> 
> Rebase 0900-remove-selftests.patch on gcc 8.1.0
> 
> Remove upstream patches 0001-m68k-coldfire-pr68467.patch and
> 0892-microblaze-Revert.patch.
> 
> Use bz2 release tarball only for gcc 4.9 since all other version
> now use xz tarball.
> 
> Runtime tested on x86_64 with binutils 2.30, gcc 8.1.0,
> kernel headers 4.14 and glibc 2.27.
> 
> Buildtime tested with glibc with all supported architectures.
> 
> Buildtime tested on x86_64 with musl and uClibc-ng
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> ---
>  package/gcc/8.1.0/0001-uclibc-conf.patch           |  29 ++++
>  package/gcc/8.1.0/0002-arm-softfloat-libgcc.patch  |  45 +++++++
>  package/gcc/8.1.0/0003-remove-selftests.patch      | 149 +++++++++++++++++++++
>  package/gcc/Config.in.host                         |   7 +
>  package/gcc/gcc.hash                               |   2 +
>  package/gcc/gcc.mk                                 |  10 +-
>  toolchain/Config.in                                |   5 +
>  .../toolchain-external-custom/Config.in.options    |   6 +

Could you split up this patch in several patches:

 - One adding the toolchain/Config.in contents for gcc 8.x

 - One adding support for gcc 8.x in package/gcc

 - One adding support for gcc 8.x in toolchain/toolchain-external

It would be good if you could also add a patch to update our default
gcc version to 7.x.

Maybe it's also time to remove gcc 4.9 and gcc 5.x ? I know when gcc
7.x was added and we changed to gcc 6.x as the default, we should have
removed gcc 4.9, but there was some opposition to this. Hopefully we
can do this removal now ?

> diff --git a/package/gcc/8.1.0/0001-uclibc-conf.patch b/package/gcc/8.1.0/0001-uclibc-conf.patch
> new file mode 100644
> index 0000000000..7d0f710945
> --- /dev/null
> +++ b/package/gcc/8.1.0/0001-uclibc-conf.patch
> @@ -0,0 +1,29 @@
> +From 07475e62626e246df07f35c4427b207c480b1f95 Mon Sep 17 00:00:00 2001
> +From: Romain Naour <romain.naour@gmail.com>
> +Date: Tue, 2 May 2017 22:36:15 +0200
> +Subject: [PATCH 1/3] uclibc-conf

Use "git format-patch -N" when generating patches to not have numbering
inside the patches.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com