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Since at least Linux 6.16, but possibly earlier, host-openssl is now needed on the vast majority of CPU architectures. A common reason to require host-openssl in the Kernel is to enable Wireless Networking. This is now enabled in most defconfigs. - When enabling CONFIG_NET [1] - CONFIG_WIRELESS is enabled by default [2] - For Wireless, CONFIG_CFG80211 is commonly enabled too [3] - CONFIG_CFG80211_REQUIRE_SIGNED_REGDB is enabled by default which selects SYSTEM_DATA_VERIFICATION [4] - CONFIG_SYSTEM_DATA_VERIFICATION select SYSTEM_TRUSTED_KEYRING [5] - CONFIG_SYSTEM_TRUSTED_KEYRING adds system_certificates.o which needs x509_certificate_list and extract-cert [6] - and finally, extract-cert uses host-openssl [7] Even if some architecture defconfigs (such as m68k) are not directly enabling CONFIG_CFG80211 in the Kernel, there is still chances for this option to be enabled by Kernel configuration fixups of selected Buildroot package. This situation can happen in Buildroot autobuilders. Also, in some specific cases, host-openssl might be needed for some other reasons (e.g. s390 arch defconfig enables SYSTEM_DATA_VERIFICATION which ends up the same way). Indeed, in order to fix build issues, we would have to add: armeb, microblaze, loongarch, m68k, mips, mipsel, mips64, mips64el, powerpc, powerpc64, powerpc64el, riscv, s390, and possibly others. So intead, when "latest kernel" is used with the default architecture configuration, always select host-openssl independently of the selected architectures. Fixes: https://autobuild.buildroot.net/results/9a314e759f7640d760003e46f86153300478ec60/ (mipsel) https://autobuild.buildroot.net/results/3bcc674ea5a7cdf031200b0cd2f9f71400ba391c/ (mips64el) https://autobuild.buildroot.net/results/b24983fd91f408de56479b7d7d57fc9fd3333d7d/ (s390) https://autobuild.buildroot.net/results/b262fc6f67a9fed55faffcdd580d89f4664e1e16/ (powerpc64) https://autobuild.buildroot.net/results/45da1538457b18671fa18efe3e1aa57a15561370/ (m68k) https://autobuild.buildroot.net/results/0a457375d2509f1b29a449dfa50f29fc7e56e568/ (armeb) https://autobuild.buildroot.net/results/814ca5f048827a635dea0199878fa82d5012b649/ (loongarch64) https://autobuild.buildroot.net/results/b684d0b37e5187aa9b31693356f8515857d19f7a/ (microblaze) [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/net/Kconfig?h=v6.18.1#n6 [2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/net/Kconfig?h=v6.18.1#n428 [3] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/net/wireless/Kconfig?h=v6.18.1#n17 [4] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/net/wireless/Kconfig?h=v6.18.1#n89 [5] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/init/Kconfig?h=v6.18.1#n2063 [6] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/certs/Makefile?h=v6.18.1#n6 [7] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/certs/extract-cert.c?h=v6.18.1#n21 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Reviewed-by: Romain Naour <romain.naour@smile.fr> [Julien: add extra info in commit log] Signed-off-by: Julien Olivain <ju.o@free.fr>