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This patch updates the default toolchain used for runtime tests. The last time this toolchain was updated was in commit0207a653233 years ago. Since then, multiple things have changed: Firstly, it used uclibc-ng as the libc whereas since commit4057e36ca9, glibc is used as the default library. And secondly, since commit531b2a10cd, buildroot dropped the support for gcc 8 and it cannot be built internally anymore. So the testsuite was executed using a toolchain that can't be built by the Buildroot internal toolchain backend anymore. This new Bootlin toolchain stable 2022.08-1 is based on gcc 11.3.0, linux headers 4.9.327, glibc 2.35 and binutils 2.38. The previous toolchain bleeding edge 2018.11-1 is based on gcc 8.2.0, linux headers 4.14.80, uclibc 1.0.30 and binutils 2.31.1 Nowadays Bootlin toolchains are packaged in Buildroot and we can directly select them from BASIC_TOOLCHAIN_CONFIG and avoid setting the toolchain parameters (BR2_TOOLCHAIN_EXTERNAL_CUSTOM...). The switch to Glibc requires to update some tests for the following reasons: - TestPython3Py, TestPython3Pyc and TestPython3PyPyc has been updated since they use the libc binary file name in their test (uClibc: libc.so.1 vs Glibc: libc.so.6). - TestTmux needs at least one locale to pass (as stated in tmux help text "tmux needs a working UTF-8 locale"), so use "C.UTF-8". - TestOpenSsh needs a toolchain >= 5.x due to a openssh issue (Similar to: https://bugs.busybox.net/show_bug.cgi?id=13671) Use the Bootlin toolchain bleeding-edge 2022.08-1 rhat provide kernel headers 5.4 - TestShadow needs a toolchain >= 4.14 Use the Bootlin toolchain bleeding-edge 2022.08-1 rhat provide kernel headers 5.4 Runtime tested on the gcc farm server. Signed-off-by: Sebastian Weyer <sebastian.weyer@smile.fr> Signed-off-by: Romain Naour <romain.naour@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>