initial buildroot for linux 5.15

package/cramfs/Config.in

@@ -0,0 +1,8 @@
+config BR2_PACKAGE_CRAMFS
+	bool "cramfs"
+	select BR2_PACKAGE_ZLIB
+	help
+	  cramfs is a compressed read-only filesystem. This package
+	  contains the tools to generate and check a cramfs filesystem.
+
+	  https://github.com/npitre/cramfs-tools

package/cramfs/Config.in.host

@@ -0,0 +1,7 @@
+config BR2_PACKAGE_HOST_CRAMFS
+	bool "host cramfs"
+	help
+	  cramfs is a compressed read-only filesystem. This package
+	  contains the tools to generate and check a cramfs filesystem.
+
+	  https://github.com/npitre/cramfs-tools

package/cramfs/cramfs.hash

@@ -0,0 +1,3 @@
+# Locally computed:
+sha256  cdb7a4ecad034f063b6456b37cdf653ae31758a224c32161e54712a9d7f01cc3  cramfs-2.1.tar.gz
+sha256  204d8eff92f95aac4df6c8122bc1505f468f3a901e5a4cc08940e0ede1938994  COPYING

package/cramfs/cramfs.mk

@@ -0,0 +1,34 @@
+################################################################################
+#
+# cramfs
+#
+################################################################################
+
+CRAMFS_VERSION = 2.1
+CRAMFS_SITE = $(call github,npitre,cramfs-tools,v$(CRAMFS_VERSION))
+CRAMFS_LICENSE = GPL-2.0+
+CRAMFS_LICENSE_FILES = COPYING
+
+CRAMFS_DEPENDENCIES = zlib
+HOST_CRAMFS_DEPENDENCIES = host-zlib
+
+define CRAMFS_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) CC="$(TARGET_CC)" CFLAGS="$(TARGET_CFLAGS)" LDFLAGS="$(TARGET_LDFLAGS)" -C $(@D)
+endef
+
+define CRAMFS_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 755 $(@D)/mkcramfs $(TARGET_DIR)/usr/bin/mkcramfs
+	$(INSTALL) -D -m 755 $(@D)/cramfsck $(TARGET_DIR)/usr/bin/cramfsck
+endef
+
+define HOST_CRAMFS_BUILD_CMDS
+	$(HOST_MAKE_ENV) $(MAKE) CFLAGS="$(HOST_CFLAGS) -Wall -O2 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64" LDFLAGS="$(HOST_LDFLAGS)" -C $(@D)
+endef
+
+define HOST_CRAMFS_INSTALL_CMDS
+	$(INSTALL) -D -m 755 $(@D)/mkcramfs $(HOST_DIR)/bin/mkcramfs
+	$(INSTALL) -D -m 755 $(@D)/cramfsck $(HOST_DIR)/bin/cramfsck
+endef
+
+$(eval $(generic-package))
+$(eval $(host-generic-package))