package: Add U-Boot for at91

Adds u-boot for the at91 platform and a couple of boards.
The build honours COPTS to benefit from fortify source et al.

Signed-off-by: Ben Whitten <ben.whitten@gmail.com>

package/boot/uboot-at91/Makefile

@@ -0,0 +1,102 @@
+#
+# Copyright (C) 2016 Ben Whitten <ben.whitten@gmail.com>
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=u-boot
+PKG_VERSION:=2016.05
+PKG_RELEASE:=1
+
+PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
+PKG_SOURCE_URL:= \
+	http://mirror2.openwrt.org/sources \
+	ftp://ftp.denx.de/pub/u-boot
+PKG_MD5SUM:=3a8613d753dfa707c937991a35404510
+
+PKG_LICENSE:=GPL-2.0 GPL-2.0+
+PKG_LICENSE_FILES:=Licenses/README
+
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define uboot/Default
+  TITLE:=
+endef
+
+define uboot/at91sam9m10g45ek_nandflash
+  TITLE:=U-Boot for the AT91SAM9M10G45-EK board (NandFlash)
+endef
+
+define uboot/at91sam9x5ek_nandflash
+  TITLE:=U-Boot for the AT91SAM9X5-EK board (NandFlash)
+endef
+
+UBOOTS := \
+	at91sam9m10g45ek_nandflash \
+	at91sam9x5ek_nandflash
+
+define Package/uboot/template
+define Package/uboot-at91-$(1)
+  SECTION:=boot
+  CATEGORY:=Boot Loaders
+  DEPENDS:=@TARGET_at91
+  TITLE:=$(2)
+  URL:=http://www.denx.de/wiki/U-Boot
+  VARIANT:=$(1)
+  MAINTAINER:=Ben Whitten <ben.whitten@gmail.com>
+endef
+endef
+
+define BuildUBootPackage
+	$(eval $(uboot/Default))
+	$(eval $(uboot/$(1)))
+	$(call Package/uboot/template,$(1),$(TITLE))
+endef
+
+ifdef BUILD_VARIANT
+$(eval $(call uboot/$(BUILD_VARIANT)))
+UBOOT_CONFIG:=$(if $(CONFIG),$(CONFIG),$(BUILD_VARIANT))
+UBOOT_IMAGE:=$(if $(IMAGE),$(IMAGE),lede-$(BOARD)-$(BUILD_VARIANT)-u-boot.bin)
+endif
+
+define Build/Configure
+	+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) \
+		$(UBOOT_CONFIG)_config
+endef
+
+define Build/Compile
+	+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) \
+		CROSS_COMPILE=$(TARGET_CROSS) \
+		KCFLAGS="$(filter-out -fstack-protector, $(TARGET_CFLAGS))"
+endef
+
+define Package/uboot/install/default
+	$(INSTALL_DIR) $(BIN_DIR)/uboot-$(BOARD)-$(1)
+
+	$(CP) $(PKG_BUILD_DIR)/u-boot.bin \
+		$(BIN_DIR)/uboot-$(BOARD)-$(1)/u-boot.bin
+
+	$(CP) $(PKG_BUILD_DIR)/boot.bin \
+		$(BIN_DIR)/uboot-$(BOARD)-$(1)/boot.bin
+endef
+
+define Package/uboot/install/template
+define Package/uboot-at91-$(1)/install
+	$(call Package/uboot/install/default,$(2))
+endef
+endef
+
+$(foreach u,$(UBOOTS), \
+	$(eval $(call Package/uboot/install/template,$(u),$(u))) \
+)
+
+$(foreach u,$(UBOOTS), \
+	$(eval $(call BuildUBootPackage,$(u))) \
+	$(eval $(call BuildPackage,uboot-at91-$(u))) \
+)