Update makefile to build fiptool for Windows

Although support for building fiptool on a Windows host was present,
the binary was not built when the top level makefile was invoked.

This patch makes the necessary changes to the to support building of
fiptool on a Windows host PC from the main makefile.

Change-Id: I0c01ba237fa3010a027a1b324201131210cf4d7c
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>

Makefile

@@ -1157,7 +1157,13 @@ endif
 clean:
 	@echo "  CLEAN"
 	$(call SHELL_REMOVE_DIR,${BUILD_PLAT})
+ifdef UNIX_MK
 	${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
+else
+# Clear the MAKEFLAGS as we do not want
+# to pass the gnumake flags to nmake.
+	${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL)) clean
+endif
 	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
 	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${ENCTOOLPATH} clean
 	${Q}${MAKE} --no-print-directory -C ${ROMLIBPATH} clean
@@ -1166,7 +1172,13 @@ realclean distclean:
 	@echo "  REALCLEAN"
 	$(call SHELL_REMOVE_DIR,${BUILD_BASE})
 	$(call SHELL_DELETE_ALL, ${CURDIR}/cscope.*)
+ifdef UNIX_MK
 	${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
+else
+# Clear the MAKEFLAGS as we do not want
+# to pass the gnumake flags to nmake.
+	${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL)) realclean
+endif
 	${Q}${MAKE} --no-print-directory -C ${SPTOOLPATH} clean
 	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
 	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${ENCTOOLPATH} realclean
@@ -1252,7 +1264,16 @@ fwu_fip: ${BUILD_PLAT}/${FWU_FIP_NAME}
 
 .PHONY: ${FIPTOOL}
 ${FIPTOOL}:
+	@${ECHO_BLANK_LINE}
+	@echo "Building $@"
+ifdef UNIX_MK
 	${Q}${MAKE} CPPFLAGS="-DVERSION='\"${VERSION_STRING}\"'" FIPTOOL=${FIPTOOL} --no-print-directory -C ${FIPTOOLPATH}
+else
+# Clear the MAKEFLAGS as we do not want
+# to pass the gnumake flags to nmake.
+	${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL))
+endif
+	@${ECHO_BLANK_LINE}
 
 sptool: ${SPTOOL}
 .PHONY: ${SPTOOL}

make_helpers/windows.mk

 #
-# Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -86,3 +86,5 @@ define MAKE_BUILD_STRINGS
 		$$(CC) $$(TF_CFLAGS) $$(CFLAGS) -x c -c - -o $1
 endef
 
+MSVC_NMAKE := nmake.exe
+

tools/fiptool/Makefile.msvc

-#
-# Copyright (c) 2019, Arm Limited. All rights reserved.
-#
-# SPDX-License-Identifier: BSD-3-Clause
-#
-
-CC = cl.exe
-LD = link.exe
-
-FIPTOOL = fiptool.exe
-OBJECTS = fiptool.obj tbbr_config.obj win_posix.obj
-
-INC = -I. -I..\..\include\tools_share
-CFLAGS = $(CFLAGS) /nologo /Za /Zi /c /O2 /MT
-
-all: $(FIPTOOL)
-
-$(FIPTOOL): $(OBJECTS)
-	$(LD) /INCREMENTAL:NO /debug /nodefaultlib:libc.lib /out:$@ $(LIBS) $**
-
-.PHONY: clean realclean
-
-clean:
-	del /f /q $(OBJECTS) > nul
-
-realclean:
-	del /f /q $(OBJECTS) $(FIPTOOL) > nul
-
-.c.obj:
-	$(CC) -c $(CFLAGS) $(INC) $< -Fo$@
+#
+# Copyright (c) 2019-2020, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+CC = cl.exe
+LD = link.exe
+
+# FIPTOOLPATH and FIPTOOL are passed from the main makefile.
+
+OBJECTS = $(FIPTOOLPATH)\fiptool.obj     \
+          $(FIPTOOLPATH)\tbbr_config.obj \
+          $(FIPTOOLPATH)\win_posix.obj
+
+INC = -I$(FIPTOOLPATH) -Iinclude\tools_share
+
+CFLAGS = $(CFLAGS) /nologo /Za /Zi /c /O2 /MT
+
+all: $(FIPTOOL)
+
+$(FIPTOOL): $(OBJECTS)
+	$(LD) /nologo /INCREMENTAL:NO /debug /nodefaultlib:libc.lib /out:$@ $(LIBS) $**
+
+.PHONY: clean realclean
+
+clean:
+	-@del /f /q $(OBJECTS) > nul
+	-@del /f /q $(FIPTOOLPATH)\*.pdb > nul
+
+realclean:
+	-@del /f /q $(OBJECTS) > nul
+	-@del /f /q $(FIPTOOLPATH)\*.pdb > nul
+	-@del /f /q $(FIPTOOL) > nul
+
+.c.obj:
+	$(CC) -c $(CFLAGS) $(INC) $< -Fo$@