[Buildroot] [2020.02.x] package/busybox: fix build with glibc 2.31

[Peter Korsgaard]

>>>>> "Matthew" == Matthew Weber <matthew.weber at rockwellcollins.com> writes:

 > Peter,
 > Would you mind picking over the following commit to add busybox glibc
 > 2.31 support to the 2020.02LTS?

 > commit 13f2d688a24f47446af236829bd6ca194d5aea5b
 > Author: Carlos Santos <unixmania at gmail.com>
 > Date:   Sun Mar 22 14:13:01 2020 -0300
 > package/busybox: fix build with glibc 2.31

 > The known [1,2] issue was found when using a newer external toolchain
 > with the following configuration and the 2020.02.7 tag.
 > BR2_TOOLCHAIN_EXTERNAL_URL="https://toolchains.bootlin.com/downloads/releases/toolchains/aarch64/tarballs/aarch64--glibc--stable-2020.08-1.tar.bz2"
 > BR2_TOOLCHAIN_EXTERNAL_GCC_9=y
 > BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_9=y

But that is a general issue with using "too new" external toolchains
with older Buildroot versions. Is there any specific reason for wanting
to use that toolchain and not E.G. something built from 2020.02.x?

-- 
Bye, Peter Korsgaard