initial buildroot for linux 5.15

package/nbd/Config.in

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+config BR2_PACKAGE_NBD
+	bool "nbd"
+	depends on BR2_USE_WCHAR
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU
+	select BR2_PACKAGE_LIBGLIB2
+	help
+	  NBD is a set of utilities to configure network block devices,
+	  allowing access to remote block devices over TCP/IP network.
+
+	  http://nbd.sf.net/
+
+if BR2_PACKAGE_NBD
+
+config BR2_PACKAGE_NBD_CLIENT
+	bool "nbd client"
+	default y
+	help
+	  The client part of NBD.
+
+config BR2_PACKAGE_NBD_SERVER
+	bool "nbd server"
+	help
+	  The server part of NBD.
+
+config BR2_PACKAGE_NBD_TRDUMP
+	bool "nbd trdump"
+	help
+	  Utility to dump server logs in human-readable form.
+
+endif
+
+comment "nbd needs a toolchain w/ wchar, threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS

package/nbd/nbd.hash

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+# From http://sourceforge.net/projects/nbd/files/nbd/3.21/
+md5  c51c4c500fe1ed84c3d5d5dd2ca71d23  nbd-3.21.tar.xz
+sha1  88c3296d43d20d7bda97e0f1bab0243a4f6fa880  nbd-3.21.tar.xz
+
+# Locally calculated
+sha256  e7688af39d91733bbcd2db08062c44fe503d004e51528740139c44aff6a6bef9  nbd-3.21.tar.xz
+sha256  8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING

package/nbd/nbd.mk

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+################################################################################
+#
+# nbd
+#
+################################################################################
+
+NBD_VERSION = 3.21
+NBD_SOURCE = nbd-$(NBD_VERSION).tar.xz
+NBD_SITE = http://downloads.sourceforge.net/project/nbd/nbd/$(NBD_VERSION)
+NBD_CONF_OPTS = --enable-lfs
+NBD_DEPENDENCIES = host-pkgconf libglib2
+NBD_LICENSE = GPL-2.0
+NBD_LICENSE_FILES = COPYING
+NBD_CPE_ID_VENDOR = network_block_device_project
+NBD_CPE_ID_PRODUCT = network_block_device
+
+ifeq ($(BR2_TOOLCHAIN_USES_UCLIBC),y)
+# We have linux/falloc.h
+# but uClibc lacks fallocate(2) which is a glibc-ism
+NBD_CONF_ENV = ac_cv_header_linux_falloc_h=no
+endif
+
+ifneq ($(BR2_PACKAGE_NBD_CLIENT),y)
+NBD_TOREMOVE += /usr/sbin/nbd-client
+endif
+ifneq ($(BR2_PACKAGE_NBD_SERVER),y)
+NBD_TOREMOVE += /usr/bin/nbd-server
+endif
+ifneq ($(BR2_PACKAGE_NBD_TRDUMP),y)
+NBD_TOREMOVE += /usr/bin/nbd-trdump
+endif
+
+define NBD_CLEANUP_AFTER_INSTALL
+	rm -f $(addprefix $(TARGET_DIR), $(NBD_TOREMOVE))
+endef
+
+NBD_POST_INSTALL_TARGET_HOOKS += NBD_CLEANUP_AFTER_INSTALL
+
+$(eval $(autotools-package))