syslinux: convert to GENTARGETS

Moreover, the installation of pxelinux and/or isolinux is now handled
as suboptions, like we traditionally do for other packages. This allows
to have a single option (BR2_TARGET_SYSLINUX) that enables the
syslinux package.

[Peter: drop basename in install step]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

boot/syslinux/Config.in

@@ -5,8 +5,12 @@ config BR2_TARGET_SYSLINUX
 	  The syslinux bootloader for x86 systems.
 	  This includes: syslinux, pxelinux, extlinux.
 
-config BR2_TARGET_PXELINUX
-	bool "pxelinux"
-	depends on BR2_i386 || BR2_x86_64
-	help
-	  The pxelinux loader for x86 systems.
+config BR2_TARGET_SYSLINUX_ISOLINUX
+	bool "Install isolinux"
+	depends on BR2_TARGET_SYSLINUX
+	default y
+
+config BR2_TARGET_SYSLINUX_PXELINUX
+	bool "Install pxelinux"
+	depends on BR2_TARGET_SYSLINUX
+	default y

boot/syslinux/syslinux.mk

@@ -4,42 +4,29 @@
 #
 #############################################################
 
-SYSLINUX_VERSION:=3.85
-SYSLINUX_DIR=$(BUILD_DIR)/syslinux-$(SYSLINUX_VERSION)
-SYSLINUX_SOURCE=syslinux-$(SYSLINUX_VERSION).tar.bz2
-SYSLINUX_CAT:=$(BZCAT)
-SYSLINUX_SITE=$(BR2_KERNEL_MIRROR)/linux/utils/boot/syslinux/3.xx/
+SYSLINUX_VERSION = 3.85
+SYSLINUX_SOURCE  = syslinux-$(SYSLINUX_VERSION).tar.bz2
+SYSLINUX_SITE    = $(BR2_KERNEL_MIRROR)/linux/utils/boot/syslinux/3.xx/
 
-$(DL_DIR)/$(SYSLINUX_SOURCE):
-	 $(call DOWNLOAD,$(SYSLINUX_SITE),$(SYSLINUX_SOURCE))
+SYSLINUX_INSTALL_TARGET = NO
+SYSLINUX_INSTALL_IMAGES = YES
 
-syslinux-source: $(DL_DIR)/$(SYSLINUX_SOURCE)
+SYSLINUX_DEPENDENCIES = host-nasm
 
-$(SYSLINUX_DIR)/.unpacked: $(DL_DIR)/$(SYSLINUX_SOURCE) $(SYSLINUX_PATCH)
-	mkdir -p $(@D)
-	$(SYSLINUX_CAT) $(DL_DIR)/$(SYSLINUX_SOURCE) | tar $(TAR_STRIP_COMPONENTS)=1 -C $(@D) $(TAR_OPTIONS) -
-	toolchain/patch-kernel.sh $(@D) boot/syslinux/ \*.patch
-	touch -c $@
+define SYSLINUX_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) CC="$(HOSTCC)" AR="$(HOSTAR)" -C $(@D)
+endef
 
-$(SYSLINUX_DIR)/.compiled: $(SYSLINUX_DIR)/.unpacked
-	$(TARGET_MAKE_ENV) $(MAKE) CC="$(HOSTCC)" AR="$(HOSTAR)" -C $(SYSLINUX_DIR)
-	touch -c $@
+SYSLINUX_IMAGES-$(BR2_TARGET_SYSLINUX_ISOLINUX) += isolinux.bin
+SYSLINUX_IMAGES-$(BR2_TARGET_SYSLINUX_PXELINUX) += pxelinux.bin
 
-$(BINARIES_DIR)/isolinux.bin: $(SYSLINUX_DIR)/.compiled
-	cp -a $(SYSLINUX_DIR)/core/isolinux.bin $@
+define SYSLINUX_INSTALL_IMAGES_CMDS
+	for i in $(SYSLINUX_IMAGES-y); do \
+		$(INSTALL) -D -m 0755 $(@D)/core/$$i $(BINARIES_DIR)/$$i; \
+	done
+endef
 
-$(BINARIES_DIR)/pxelinux.bin: $(SYSLINUX_DIR)/.compiled
-	cp -a $(SYSLINUX_DIR)/core/pxelinux.bin $@
-
-syslinux: host-nasm $(BINARIES_DIR)/isolinux.bin
-pxelinux: host-nasm $(BINARIES_DIR)/pxelinux.bin
-
-pxelinux-clean syslinux-clean:
-	rm -f $(BINARIES_DIR)/isolinux.bin $(BINARIES_DIR)/pxelinux.bin
-	-$(MAKE) -C $(SYSLINUX_DIR) clean
-
-pxelinux-dirclean syslinux-dirclean:
-	rm -rf $(SYSLINUX_DIR)
+$(eval $(call GENTARGETS,boot,syslinux))
 
 #############################################################
 #
@@ -49,6 +36,3 @@ pxelinux-dirclean syslinux-dirclean:
 ifeq ($(BR2_TARGET_SYSLINUX),y)
 TARGETS+=syslinux
 endif
-ifeq ($(BR2_TARGET_PXELINUX),y)
-TARGETS+=pxelinux
-endif