tfa-layerscape: fix fiptool host build

fiptool is a host tool, used in a firmware generation pipeline, but it's
not treated as such, leading to the build breakage on the hosts which
don't have {Open,Libre}SSL dev package installed:

 In file included from fiptool.h:16:0,
                 from fiptool.c:19:
		 fiptool_platform.h:18:27: fatal error: openssl/sha.h:
		 No such file or directory
		  #  include <openssl/sha.h>

So this patch promotes fiptool into the host tool with proper host
include and library paths under STAGING_DIR.

Ref: https://github.com/openwrt/openwrt/pull/2267
Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/boot/tfa-layerscape/Makefile

@@ -16,8 +16,9 @@ PKG_SOURCE_URL:=https://source.codeaurora.org/external/qoriq/qoriq-components/at
 PKG_SOURCE_VERSION:=7e34aebe658c7c3439d2d68b0ce6b9776e8e6996
 PKG_MIRROR_HASH:=9cf0bc32fa589a0ee7c48c87898679e645341f29da1253d0ba5d2e82c6ea074d
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
-PKG_BUILD_DEPENDS:=uboot-layerscape
+PKG_BUILD_DEPENDS:=uboot-layerscape tfa-layerscape/host
 
+include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/package.mk
 
 define Package/tfa-layerscape/Config
@@ -46,7 +47,20 @@ define Build/Compile
 	$(MAKE) -C $(PKG_BUILD_DIR) CROSS_COMPILE=$(TARGET_CROSS) \
 		fip pbl PLAT=$(PLAT) BOOT_MODE=$(BOOT_MODE) \
 		RCW=$(STAGING_DIR_IMAGE)/$(BUILD_VARIANT)-rcw.bin \
-		BL33=$(STAGING_DIR_IMAGE)/$(BUILD_VARIANT)-uboot.bin
+		BL33=$(STAGING_DIR_IMAGE)/$(BUILD_VARIANT)-uboot.bin \
+		FIPTOOL=$(STAGING_DIR_HOST)/bin/fiptool
+endef
+
+HOST_CFLAGS += -Wall -Werror -pedantic -std=c99
+define Host/Compile
+	$(MAKE) -C \
+		$(HOST_BUILD_DIR)/tools/fiptool \
+		CFLAGS="$(HOST_CFLAGS)" \
+		LDFLAGS="$(HOST_LDFLAGS)"
+endef
+
+define Host/Install
+	$(INSTALL_BIN) $(HOST_BUILD_DIR)/tools/fiptool/fiptool $(STAGING_DIR_HOST)/bin/
 endef
 
 define Package/tfa-layerscape/ls1012ardb
@@ -132,6 +146,7 @@ TFAS := \
   ls1088ardb-sdboot \
   ls2088ardb
 
+$(eval $(call HostBuild))
 $(foreach tfa,$(TFAS), \
 	$(eval $(Package/tfa-layerscape/$(tfa))) \
 	$(eval $(call Package/tfa-layerscape/Config,$(tfa),$(TITLE),$(BIN_BL2),$(BIN_FIP))) \

package/boot/tfa-layerscape/patches/001-fiptool-hostbuild-fixes.patch

@@ -0,0 +1,71 @@
+--- a/Makefile
++++ b/Makefile
+@@ -448,10 +448,6 @@ endif
+ CRTTOOLPATH		?=	tools/cert_create
+ CRTTOOL			?=	${CRTTOOLPATH}/cert_create${BIN_EXT}
+ 
+-# Variables for use with Firmware Image Package
+-FIPTOOLPATH		?=	tools/fiptool
+-FIPTOOL			?=	${FIPTOOLPATH}/fiptool${BIN_EXT}
+-
+ ################################################################################
+ # Include BL specific makefiles
+ ################################################################################
+@@ -661,14 +657,12 @@ endif
+ clean:
+ 	@echo "  CLEAN"
+ 	$(call SHELL_REMOVE_DIR,${BUILD_PLAT})
+-	${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
+ 	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
+ 
+ realclean distclean:
+ 	@echo "  REALCLEAN"
+ 	$(call SHELL_REMOVE_DIR,${BUILD_BASE})
+ 	$(call SHELL_DELETE_ALL, ${CURDIR}/cscope.*)
+-	${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
+ 	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
+ 
+ checkcodebase:		locate-checkpatch
+@@ -717,7 +711,7 @@ certificates: ${CRT_DEPS} ${CRTTOOL}
+ 	@${ECHO_BLANK_LINE}
+ endif
+ 
+-${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL}
++${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS}
+ 	${Q}${FIPTOOL} create ${FIP_ARGS} $@
+ 	${Q}${FIPTOOL} info $@
+ 	@${ECHO_BLANK_LINE}
+@@ -733,21 +727,16 @@ fwu_certificates: ${FWU_CRT_DEPS} ${CRTT
+ 	@${ECHO_BLANK_LINE}
+ endif
+ 
+-${BUILD_PLAT}/${FWU_FIP_NAME}: ${FWU_FIP_DEPS} ${FIPTOOL}
++${BUILD_PLAT}/${FWU_FIP_NAME}: ${FWU_FIP_DEPS}
+ 	${Q}${FIPTOOL} create ${FWU_FIP_ARGS} $@
+ 	${Q}${FIPTOOL} info $@
+ 	@${ECHO_BLANK_LINE}
+ 	@echo "Built $@ successfully"
+ 	@${ECHO_BLANK_LINE}
+ 
+-fiptool: ${FIPTOOL}
+ fip: ${BUILD_PLAT}/${FIP_NAME}
+ fwu_fip: ${BUILD_PLAT}/${FWU_FIP_NAME}
+ 
+-.PHONY: ${FIPTOOL}
+-${FIPTOOL}:
+-	${Q}${MAKE} CPPFLAGS="-DVERSION='\"${VERSION_STRING}\"'" --no-print-directory -C ${FIPTOOLPATH}
+-
+ cscope:
+ 	@echo "  CSCOPE"
+ 	${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files
+--- a/tools/fiptool/Makefile
++++ b/tools/fiptool/Makefile
+@@ -37,7 +37,7 @@ all: ${PROJECT} fip_create
+ 
+ ${PROJECT}: ${OBJECTS} Makefile
+ 	@echo "  LD      $@"
+-	${Q}${HOSTCC} ${OBJECTS} -o $@ ${LDLIBS}
++	${Q}${HOSTCC} ${OBJECTS} -o $@ ${LDLIBS} $(LDFLAGS)
+ 	@${ECHO_BLANK_LINE}
+ 	@echo "Built $@ successfully"
+ 	@${ECHO_BLANK_LINE}