initial buildroot for linux 5.15

package/udpcast/Config.in

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+comment "udpcast needs a toolchain w/ threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_TOOLCHAIN_HAS_THREADS
+
+config BR2_PACKAGE_UDPCAST
+	bool "udpcast"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
+	help
+	  A multicast protocol implementation which happens to
+	  be very handy for imaging drives over the network.
+
+	  http://www.udpcast.linux.lu/
+
+if BR2_PACKAGE_UDPCAST
+
+config BR2_PACKAGE_UDPCAST_SENDER
+	bool "sender"
+	help
+	  The udpcast transmitter.
+
+config BR2_PACKAGE_UDPCAST_RECEIVER
+	bool "receiver"
+	help
+	  The udpcast receiver.
+
+endif

package/udpcast/udpcast.hash

@@ -0,0 +1,3 @@
+# locally computed hash
+sha256  9c19eebaa6e2f78127f0d59e95d0ce003b687d61e283b5963a1da6b8ac41f21a  udpcast-20200328.tar.gz
+sha256  422befd3503b1f39a6027017f639874c1f274e37ec60ba3174894646b584ccbc  COPYING

package/udpcast/udpcast.mk

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+################################################################################
+#
+# udpcast
+#
+################################################################################
+
+UDPCAST_VERSION = 20200328
+UDPCAST_SITE = http://www.udpcast.linux.lu/download
+UDPCAST_DEPENDENCIES = host-m4
+UDPCAST_LICENSE = BSD-2-Clause, GPL-2.0+
+UDPCAST_LICENSE_FILES = COPYING
+
+define UDPCAST_REMOVE_UDP_SENDER
+	rm -f $(TARGET_DIR)/usr/sbin/udp-sender
+	rm -f $(TARGET_DIR)/usr/sbin/udp-sender.1
+endef
+
+ifneq ($(BR2_PACKAGE_UDPCAST_SENDER),y)
+UDPCAST_POST_INSTALL_TARGET_HOOKS += UDPCAST_REMOVE_UDP_SENDER
+endif
+
+define UDPCAST_REMOVE_UDP_RECEIVER
+	rm -f $(TARGET_DIR)/usr/sbin/udp-receiver
+	rm -f $(TARGET_DIR)/usr/sbin/udp-receiver.1
+endef
+
+ifneq ($(BR2_PACKAGE_UDPCAST_RECEIVER),y)
+UDPCAST_POST_INSTALL_TARGET_HOOKS += UDPCAST_REMOVE_UDP_RECEIVER
+endif
+
+$(eval $(autotools-package))