initial buildroot for linux 5.15

package/btrfs-progs/Config.in

@@ -0,0 +1,17 @@
+config BR2_PACKAGE_BTRFS_PROGS
+	bool "btrfs-progs"
+	depends on BR2_USE_MMU # util-linux
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	select BR2_PACKAGE_LZO
+	select BR2_PACKAGE_UTIL_LINUX
+	select BR2_PACKAGE_UTIL_LINUX_LIBBLKID
+	select BR2_PACKAGE_UTIL_LINUX_LIBUUID
+	select BR2_PACKAGE_ZLIB
+	help
+	  Btrfs filesystem utilities
+
+	  https://btrfs.wiki.kernel.org/index.php/Main_Page
+
+comment "btrfs-progs needs a toolchain w/ threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/btrfs-progs/Config.in.host

@@ -0,0 +1,6 @@
+config BR2_PACKAGE_HOST_BTRFS_PROGS
+	bool "host btrfs-progs"
+	help
+	  Btrfs filesystem utilities
+
+	  https://btrfs.wiki.kernel.org/index.php/Main_Page

package/btrfs-progs/btrfs-progs.hash

@@ -0,0 +1,6 @@
+# From https://www.kernel.org/pub/linux/kernel/people/kdave/btrfs-progs/sha256sums.asc
+sha256 d41961b0a92160c80f894ad9a1882822889c2e1d084cbf3e08b8c214a5cf0137  btrfs-progs-v5.11.tar.xz
+# Locally computed
+sha256 0d5bf346df9e635a29dcdddf832dc5b002ca6cdc1c5c9c6c567d2a61bb0c5c15  COPYING
+sha256 3972dc9744f6499f0f9b2dbf76696f2ae7ad8af9b23dde66d6af86c9dfb36986  libbtrfsutil/COPYING
+sha256 e3a994d82e644b03a792a930f574002658412f62407f5fee083f2555c5f23118  libbtrfsutil/COPYING.LESSER

package/btrfs-progs/btrfs-progs.mk

@@ -0,0 +1,42 @@
+################################################################################
+#
+# btrfs-progs
+#
+################################################################################
+
+BTRFS_PROGS_VERSION = 5.11
+BTRFS_PROGS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/people/kdave/btrfs-progs
+BTRFS_PROGS_SOURCE = btrfs-progs-v$(BTRFS_PROGS_VERSION).tar.xz
+BTRFS_PROGS_DEPENDENCIES = host-pkgconf lzo util-linux zlib
+BTRFS_PROGS_CONF_OPTS = --disable-backtrace --disable-zstd --disable-python
+BTRFS_PROGS_LICENSE = GPL-2.0, LGPL-3.0+ (libbtrfsutil)
+BTRFS_PROGS_LICENSE_FILES = COPYING libbtrfsutil/COPYING \
+	libbtrfsutil/COPYING.LESSER
+BTRFS_PROGS_INSTALL_STAGING = YES
+
+# Doesn't autodetect static-only and tries to build both
+ifeq ($(BR2_STATIC_LIBS),y)
+BTRFS_PROGS_MAKE_OPTS = static
+BTRFS_PROGS_INSTALL_TARGET_OPTS = DESTDIR=$(TARGET_DIR) install-static
+BTRFS_PROGS_INSTALL_STAGING_OPTS = DESTDIR=$(STAGING_DIR) install-static
+endif
+
+# convert also supports conversion from reiserfs, which needs some
+# reiserfs libraries, but we have no package for them in Buildroot, so
+# we keep things simple and only handle ext2.
+ifeq ($(BR2_PACKAGE_E2FSPROGS),y)
+BTRFS_PROGS_CONF_OPTS += --enable-convert --with-convert=ext2
+BTRFS_PROGS_DEPENDENCIES += e2fsprogs
+else
+BTRFS_PROGS_CONF_OPTS += --disable-convert
+endif
+
+HOST_BTRFS_PROGS_DEPENDENCIES = host-util-linux host-lzo host-zlib
+HOST_BTRFS_PROGS_CONF_OPTS = \
+	--disable-backtrace \
+	--disable-zstd \
+	--disable-python \
+	--disable-convert
+
+$(eval $(autotools-package))
+$(eval $(host-autotools-package))