initial buildroot for linux 5.15

package/mksh/Config.in

@@ -0,0 +1,25 @@
+config BR2_PACKAGE_MKSH
+	bool "mksh"
+	depends on BR2_USE_MMU # fork()
+	help
+	  The MirBSD Korn Shell,
+
+	  mksh is a successor of pdksh but not affiliated with the
+	  pdksh developers or contributors. mksh is not affiliated
+	  with the AT&T Korn Shell, its past or present owners,
+	  other than that both attempt to implement the Korn Shell
+	  programming language.
+
+	  mksh targets users who desire a compact, fast, reliable,
+	  secure shell not cut off modern extensions; a shell with
+	  Unicode support; an actively developed, current, and
+	  portable product; one with developers that listen to
+	  their users' requests and implement them if they
+	  actually make sense.
+
+	  mksh aims to replace pdksh in all but very rare use cases
+	  (such as support for checking the Unix mbox) and in all
+	  operating environments
+	  (thus including patches from pdksh on e.g. Debian).
+
+	  http://www.mirbsd.org/mksh.htm

package/mksh/mksh.hash

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+# From http://www.mirbsd.org/mksh.htm#build
+sha256  77ae1665a337f1c48c61d6b961db3e52119b38e58884d1c89684af31f87bc506  mksh-R59c.tgz
+# Locally computed
+sha256  abf44a61ec777c98f8ae7e08e4fe25fe258e0c470215e2eeb22816f6bae72c80  mksh.1

package/mksh/mksh.mk

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+################################################################################
+#
+# mksh
+#
+################################################################################
+
+MKSH_VERSION = 59c
+MKSH_SOURCE = mksh-R$(MKSH_VERSION).tgz
+MKSH_SITE = http://www.mirbsd.org/MirOS/dist/mir/mksh
+# For MirOS License see http://www.mirbsd.org/TaC-mksh.txt
+MKSH_LICENSE = MirOS, ISC
+MKSH_LICENSE_FILES = mksh.1
+
+define MKSH_BUILD_CMDS
+	cd $(@D) && $(TARGET_MAKE_ENV) \
+		TARGET_OS=Linux $(TARGET_CONFIGURE_OPTS) \
+		sh ./Build.sh
+endef
+
+define MKSH_INSTALL_TARGET_CMDS
+	$(INSTALL) -m 0755 -D $(@D)/mksh $(TARGET_DIR)/bin/mksh
+endef
+
+# Add /bin/mksh to /etc/shells otherwise some login tools like dropbear
+# can reject the user connection. See man shells.
+define MKSH_ADD_MKSH_TO_SHELLS
+	grep -qsE '^/bin/mksh$$' $(TARGET_DIR)/etc/shells \
+		|| echo "/bin/mksh" >> $(TARGET_DIR)/etc/shells
+endef
+MKSH_TARGET_FINALIZE_HOOKS += MKSH_ADD_MKSH_TO_SHELLS
+
+$(eval $(generic-package))