build: add generic build template for u-boot packages

Signed-off-by: Felix Fietkau <nbd@nbd.name>

include/u-boot.mk

@@ -0,0 +1,96 @@
+PKG_NAME ?= u-boot
+
+ifndef PKG_SOURCE_PROTO
+PKG_SOURCE = $(PKG_NAME)-$(PKG_VERSION).tar.bz2
+PKG_SOURCE_URL = \
+	http://sources.lede-project.org \
+	ftp://ftp.denx.de/pub/u-boot
+endif
+
+PKG_BUILD_DIR = $(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
+
+PKG_TARGETS := bin
+PKG_FLAGS:=nonshared
+
+PKG_LICENSE:=GPL-2.0 GPL-2.0+
+PKG_LICENSE_FILES:=Licenses/README
+
+PKG_BUILD_PARALLEL:=1
+
+export GCC_HONOUR_COPTS=s
+
+define Package/u-boot/install/default
+	$(CP) $(patsubst %,$(PKG_BUILD_DIR)/%,$(UBOOT_IMAGE)) $(1)/
+endef
+
+Package/u-boot/install = $(Package/u-boot/install/default)
+
+define U-Boot/Init
+  BUILD_TARGET:=
+  BUILD_SUBTARGET:=
+  BUILD_DEVICES:=
+  NAME:=
+  DEPENDS:=
+  HIDDEN:=
+  VARIANT:=$(1)
+  UBOOT_CONFIG:=$(1)
+  UBOOT_IMAGE:=u-boot.bin
+endef
+
+TARGET_DEP = TARGET_$(BUILD_TARGET)$(if $(BUILD_SUBTARGET),_$(BUILD_SUBTARGET))
+
+define Build/U-Boot/Target
+  $(eval $(call U-Boot/Init,$(1)))
+  $(eval $(call U-Boot/Default,$(1)))
+  $(eval $(call U-Boot/$(1),$(1)))
+
+ define Package/u-boot-$(1)
+    SECTION:=boot
+    CATEGORY:=Boot Loaders
+    TITLE:=U-Boot for $(NAME)
+    VARIANT:=$(VARIANT)
+    DEPENDS:=@!IN_SDK $(DEPENDS)
+    HIDDEN:=$(HIDDEN)
+    ifneq ($(BUILD_TARGET),)
+      DEPENDS += @$(TARGET_DEP)
+      ifneq ($(BUILD_DEVICES),)
+        DEFAULT := y if ($(TARGET_DEP)_Default \
+		$(patsubst %,|| $(TARGET_DEP)_DEVICE_%,$(BUILD_DEVICES)) \
+		$(patsubst %,|| $(patsubst TARGET_%,TARGET_DEVICE_%,$(TARGET_DEP))_DEVICE_%,$(BUILD_DEVICES)))
+      endif
+    endif
+    URL:=http://www.denx.de/wiki/U-Boot
+  endef
+
+  define Package/u-boot-$(1)/install
+	$$(Package/u-boot/install)
+  endef
+endef
+
+define Build/Configure/U-Boot
+	+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) $(UBOOT_CONFIGURE_VARS) $(UBOOT_CONFIG)_config
+endef
+
+DTC=$(wildcard $(LINUX_DIR)/scripts/dtc/dtc)
+
+define Build/Compile/U-Boot
+	+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) \
+		CROSS_COMPILE=$(TARGET_CROSS) \
+		$(if $(DTC),DTC="$(DTC)")
+endef
+
+define BuildPackage/U-Boot/Defaults
+  Build/Configure/Default = $$$$(Build/Configure/U-Boot)
+  Build/Compile/Default = $$$$(Build/Compile/U-Boot)
+endef
+
+define BuildPackage/U-Boot
+  $(eval $(call BuildPackage/U-Boot/Defaults))
+  $(foreach type,$(if $(DUMP),$(UBOOT_TARGETS),$(BUILD_VARIANT)), \
+    $(eval $(call Build/U-Boot/Target,$(type)))
+  )
+  $(eval $(call Build/DefaultTargets))
+  $(foreach type,$(if $(DUMP),$(UBOOT_TARGETS),$(BUILD_VARIANT)), \
+    $(call BuildPackage,u-boot-$(type))
+  )
+endef