initial buildroot for linux 5.15

package/zsh/Config.in

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+config BR2_PACKAGE_ZSH
+	bool "zsh"
+	depends on BR2_USE_MMU # fork()
+	select BR2_PACKAGE_NCURSES
+	help
+	  zsh is a shell designed for interactive use, although it is
+	  also a powerful scripting language. Many of the useful
+	  features of bash, ksh, and tcsh were incorporated into zsh;
+	  many original features were added.
+
+	  http://www.zsh.org/

package/zsh/zsh.hash

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+# From http://www.zsh.org/pub/MD5SUM
+md5  e02a5428620b3dd268800c7843b3dd4d  zsh-5.8.tar.xz
+# Calculated based on the hash above and after checking signature
+# http://www.zsh.org/pub/zsh-5.8.tar.xz.asc
+sha256  dcc4b54cc5565670a65581760261c163d720991f0d06486da61f8d839b52de27  zsh-5.8.tar.xz
+# Locally calculated
+sha256  d06fdf3ef9b1ec69d6b9e170b0a9516fbad3523261ff1668bde3bfea6e0ef5f5  LICENCE

package/zsh/zsh.mk

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+################################################################################
+#
+# zsh
+#
+################################################################################
+
+ZSH_VERSION = 5.8
+ZSH_SITE = http://www.zsh.org/pub
+ZSH_SOURCE = zsh-$(ZSH_VERSION).tar.xz
+ZSH_DEPENDENCIES = ncurses
+ZSH_CONF_OPTS = --bindir=/bin
+ZSH_CONF_ENV = zsh_cv_sys_nis=no zsh_cv_sys_nis_plus=no
+ZSH_LICENSE = MIT-like
+ZSH_LICENSE_FILES = LICENCE
+ZSH_CPE_ID_VENDOR = zsh
+
+ifeq ($(BR2_PACKAGE_GDBM),y)
+ZSH_CONF_OPTS += --enable-gdbm
+ZSH_DEPENDENCIES += gdbm
+else
+ZSH_CONF_OPTS += --disable-gdbm
+endif
+
+ifeq ($(BR2_PACKAGE_LIBCAP),y)
+ZSH_CONF_OPTS += --enable-cap
+ZSH_DEPENDENCIES += libcap
+else
+ZSH_CONF_OPTS += --disable-cap
+endif
+
+ifeq ($(BR2_PACKAGE_PCRE),y)
+ZSH_CONF_OPTS += --enable-pcre
+ZSH_CONF_ENV += ac_cv_prog_PCRECONF=$(STAGING_DIR)/usr/bin/pcre-config
+ZSH_DEPENDENCIES += pcre
+else
+ZSH_CONF_OPTS += --disable-pcre
+endif
+
+# Add /bin/zsh to /etc/shells otherwise some login tools like dropbear
+# can reject the user connection. See man shells.
+define ZSH_ADD_ZSH_TO_SHELLS
+	grep -qsE '^/bin/zsh$$' $(TARGET_DIR)/etc/shells \
+		|| echo "/bin/zsh" >> $(TARGET_DIR)/etc/shells
+endef
+ZSH_TARGET_FINALIZE_HOOKS += ZSH_ADD_ZSH_TO_SHELLS
+
+# Remove versioned zsh-x.y.z binary taking up space
+define ZSH_TARGET_INSTALL_FIXUPS
+	rm -f $(TARGET_DIR)/bin/zsh-$(ZSH_VERSION)
+endef
+ZSH_POST_INSTALL_TARGET_HOOKS += ZSH_TARGET_INSTALL_FIXUPS
+
+$(eval $(autotools-package))