Merge changes from topics "rcar-tools-fix", "toolchain-cleanup" into integration

* changes:
  build: remove the `NM` variable
  build: prefer `gcc-ar` over `ar`
  build: add `--no-warn-rwx-segments` when linking with GCC
  build: always use the C compiler to assemble
  build: always use the C compiler to preprocess
  fix(rcar): fix implicit rule invocations in tools

Makefile

@@ -100,14 +100,12 @@ HOSTCC			:=	gcc
 export HOSTCC
 
 CC			:=	${CROSS_COMPILE}gcc
-CPP			:=	${CROSS_COMPILE}cpp
+CPP			:=	${CROSS_COMPILE}gcc -E
 AS			:=	${CROSS_COMPILE}gcc
-AR			:=	${CROSS_COMPILE}ar
+AR			:=	${CROSS_COMPILE}gcc-ar
 LINKER			:=	${CROSS_COMPILE}ld
 OC			:=	${CROSS_COMPILE}objcopy
 OD			:=	${CROSS_COMPILE}objdump
-NM			:=	${CROSS_COMPILE}nm
-PP			:=	${CROSS_COMPILE}gcc -E
 DTC			:=	dtc
 
 # Use ${LD}.bfd instead if it exists (as absolute path or together with $PATH).
@@ -187,7 +185,6 @@ ifneq ($(findstring clang,$(notdir $(CC))),)
 	endif
 
 	CPP		:=	$(CC) -E $(TF_CFLAGS_$(ARCH))
-	PP		:=	$(CC) -E $(TF_CFLAGS_$(ARCH))
 	AS		:=	$(CC) -c -x assembler-with-cpp $(TF_CFLAGS_$(ARCH))
 else ifneq ($(findstring gcc,$(notdir $(CC))),)
 	ifeq ($(ENABLE_LTO),1)
@@ -356,6 +353,7 @@ ifneq ($(findstring armlink,$(notdir $(LD))),)
 # LD = gcc (used when GCC LTO is enabled)
 else ifneq ($(findstring gcc,$(notdir $(LD))),)
 	# Pass ld options with Wl or Xlinker switches
+	TF_LDFLAGS		+=	$(call ld_option,-Xlinker --no-warn-rwx-segments)
 	TF_LDFLAGS		+=	-Wl,--fatal-warnings -O1
 	TF_LDFLAGS		+=	-Wl,--gc-sections
 

changelog.yaml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2021-2023, Arm Limited. All rights reserved.
+# Copyright (c) 2021-2024, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -774,6 +774,9 @@ subsections:
       - title: PSCI
         scope: psci
 
+      - title: ROMlib
+        scope: romlib
+
       - title: GPT
         scope: gpt
 

lib/romlib/Makefile

@@ -1,14 +1,14 @@
 #
-# Copyright (c) 2018-2019, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-AS          = $(CROSS_COMPILE)as
-AR          = $(CROSS_COMPILE)ar
+AS          = $(CROSS_COMPILE)gcc
+AR          = $(CROSS_COMPILE)gcc-ar
 LD          = $(CROSS_COMPILE)ld
 OC          = $(CROSS_COMPILE)objcopy
-CPP         = $(CROSS_COMPILE)cpp
+CPP         = $(CROSS_COMPILE)gcc -E
 ROMLIB_GEN  = ./romlib_generator.py
 BUILD_DIR   = $(BUILD_PLAT)/romlib
 LIB_DIR     = $(BUILD_PLAT)/lib
@@ -48,11 +48,11 @@ all: $(BUILD_DIR)/romlib.bin $(LIB_DIR)/libwrappers.a
 
 %.o: %.s
 	@echo "  AS      $@"
-	$(Q)$(AS) $(ASFLAGS) -o $@ $<
+	$(Q)$(AS) -c $(ASFLAGS) -o $@ $<
 
 $(BUILD_DIR)/%.o: %.s
 	@echo "  AS      $@"
-	$(Q)$(AS) $(ASFLAGS) -o $@ $<
+	$(Q)$(AS) -c $(ASFLAGS) -o $@ $<
 
 $(BUILD_DIR)/romlib.ld: romlib.ld.S
 	@echo "  PP      $@"

make_helpers/build_macros.mk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015-2023, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -101,9 +101,7 @@ endef
 
 # Convenience function to check for a given linker option. An call to
 # $(call ld_option, --no-XYZ) will return --no-XYZ if supported by the linker
-define ld_option
-	$(shell if $(LD) $(1) -v >/dev/null 2>&1; then echo $(1); fi )
-endef
+ld_option = $(shell $(LD) $(1) -Wl,--version >/dev/null 2>&1 || $(LD) $(1) -v >/dev/null 2>&1 && echo $(1))
 
 # Convenience function to check for a given compiler option. A call to
 # $(call cc_option, --no-XYZ) will return --no-XYZ if supported by the compiler
@@ -658,7 +656,7 @@ $(eval DTBDEP := $(patsubst %.dtb,%.d,$(DOBJ)))
 $(DOBJ): $(2) $(filter-out %.d,$(MAKEFILE_LIST)) | fdt_dirs
 	$${ECHO} "  CPP     $$<"
 	$(eval DTBS       := $(addprefix $(1)/,$(call SOURCES_TO_DTBS,$(2))))
-	$$(Q)$$(PP) $$(DTC_CPPFLAGS) -MT $(DTBS) -MMD -MF $(DTSDEP) -o $(DPRE) $$<
+	$$(Q)$$(CPP) $$(DTC_CPPFLAGS) -MT $(DTBS) -MMD -MF $(DTSDEP) -o $(DPRE) $$<
 	$${ECHO} "  DTC     $$<"
 	$$(Q)$$(DTC) $$(DTC_FLAGS) -d $(DTBDEP) -o $$@ $(DPRE)
 

plat/rockchip/rk3399/drivers/m0/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2016-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -40,11 +40,10 @@ LDFLAGS			:= -Wl,--gc-sections -Wl,--build-id=none
 
 # Cross tool
 CC			:= ${M0_CROSS_COMPILE}gcc
-CPP			:= ${M0_CROSS_COMPILE}cpp
-AR			:= ${M0_CROSS_COMPILE}ar
+CPP			:= ${M0_CROSS_COMPILE}gcc -E
+AR			:= ${M0_CROSS_COMPILE}gcc-ar
 OC			:= ${M0_CROSS_COMPILE}objcopy
 OD			:= ${M0_CROSS_COMPILE}objdump
-NM			:= ${M0_CROSS_COMPILE}nm
 
 # NOTE: The line continuation '\' is required in the next define otherwise we
 # end up with a line-feed characer at the end of the last c filename.

tools/renesas/rcar_layout_create/makefile

@@ -113,8 +113,8 @@ $(OUTPUT_FILE_SA6) : $(MEMORY_DEF_SA6) $(OBJ_FILE_SA6)
 # Compile
 ###################################################
 
-%.o:../%.c
-	$(CC) -c -I $< -o $@
+%.o: %.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<
 
 .PHONY: clean
 clean:

tools/renesas/rzg_layout_create/makefile

@@ -110,8 +110,8 @@ $(OUTPUT_FILE_SA6) : $(MEMORY_DEF_SA6) $(OBJ_FILE_SA6)
 # Compile
 ###################################################
 
-%.o:../%.c
-	$(CC) -c -I $< -o $@
+%.o: %.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<
 
 .PHONY: clean
 clean: