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#
# Copyright (c) 2025-2026, Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
GCC_V_OUTPUT := $(if $($(ARCH)-cc),$(shell $($(ARCH)-cc) -v 2>&1))
PIE_FOUND := $(findstring --enable-default-pie,${GCC_V_OUTPUT})
ifneq (${DEBUG}, 0)
cflags-common += -g -gdwarf-4
endif #(Debug)
ifeq (${AARCH32_INSTRUCTION_SET},A32)
cflags-aarch32 := -marm
else ifeq (${AARCH32_INSTRUCTION_SET},T32)
cflags-aarch32 := -mthumb
endif #(AARCH32_INSTRUCTION_SET)
cflags-aarch32 += -mno-unaligned-access
cflags-aarch64 := -mgeneral-regs-only -mstrict-align
cflags-common += $(cflags-$(ARCH))
##############################################################################
# WARNINGS Configuration
###############################################################################
# General warnings
WARNING0 := -Wall -Wmissing-include-dirs -Wunused \
-Wdisabled-optimization -Wvla -Wshadow \
-Wredundant-decls
# stricter warnings
WARNING0 += -Wextra -Wno-trigraphs
# too verbose for generic build
WARNING0 += -Wno-missing-field-initializers \
-Wno-type-limits -Wno-sign-compare \
# on clang this flag gets reset if -Wextra is set after it. No difference on gcc
WARNING0 += -Wno-unused-parameter
# Additional warnings
# Level 1 - infrequent warnings we should have none of
# full -Wextra
WARNING1 := $(WARNING0)
WARNING1 += -Wsign-compare
WARNING1 += -Wtype-limits
WARNING1 += -Wmissing-field-initializers
# Level 2 - problematic warnings that we want
# zlib, compiler-rt, coreboot, and mbdedtls blow up with these
# TODO: disable just for them and move into default build
WARNING2 := $(WARNING1)
WARNING2 += -Wold-style-definition
WARNING2 += -Wmissing-prototypes
WARNING2 += -Wmissing-format-attribute
# TF-A aims to comply with this eventually. Effort too large at present
WARNING2 += -Wundef
# currently very involved and many platforms set this off
WARNING2 += -Wunused-const-variable=2
# Level 3 - very pedantic, frequently ignored
WARNING3 := $(WARNING2)
WARNING3 += -Wbad-function-cast
WARNING3 += -Waggregate-return
WARNING3 += -Wnested-externs
WARNING3 += -Wcast-align
WARNING3 += -Wcast-qual
WARNING3 += -Wconversion
WARNING3 += -Wpacked
WARNING3 += -Wpointer-arith
WARNING3 += -Wswitch-default
cflags-common += $(WARNING$(W))
ifneq (${E},0)
cflags-common += -Werror
endif #(E)
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105523
TF_CFLAGS_MIN_PAGE_SIZE := $(call cc_option, --param=min-pagesize=0)
ifeq ($(HARDEN_SLS), 1)
TF_CFLAGS_MHARDEN_SLS := $(call cc_option, -mharden-sls=all)
endif
LTO_CFLAGS := $(if $(call bool,$(ENABLE_LTO)),-flto)
# Compiler specific warnings
cc-flags-gnu-gcc += -Wunused-but-set-variable -Wmaybe-uninitialized \
-Wpacked-bitfield-compat -Wshift-overflow=2 \
-Wlogical-op $(TF_CFLAGS_MIN_PAGE_SIZE) $(TF_CFLAGS_MHARDEN_SLS)
cc-flags-llvm-clang += -Wshift-overflow -Wshift-sign-overflow \
-Wlogical-op-parentheses
# TODO: some day GCC will be able to LTO __builtin functions (i.e. the libc and
# with it all libs). When this happens, this should become generic. This can
# also happen when GCC14 is the oldest reasonable version we support, then this
# can work with -ffat-lto-objects.
cc-flags-llvm-clang += $(LTO_CFLAGS)
# arm-clang has the same flags
cc-flags-arm-clang += $(cc-flags-llvm-clang)
cflags-common += ${DEFINES} ${INCLUDES} ${MBEDTLS_INC} -nostdinc
cflags-common += -ffunction-sections -fdata-sections \
-ffreestanding -fno-common \
-Os -std=gnu99
ifneq (${BP_OPTION},none)
cflags-common += -mbranch-protection=${BP_OPTION}
endif #(BP_OPTION)
ifeq (${SANITIZE_UB},on)
cflags-common += -fsanitize=undefined -fno-sanitize-recover
endif #(${SANITIZE_UB},on)
ifeq (${SANITIZE_UB},trap)
cflags-common += -fsanitize=undefined -fno-sanitize-recover \
-fsanitize-undefined-trap-on-error
endif #(${SANITIZE_UB},trap)
ifeq (${ERROR_DEPRECATED},0)
cflags-common += -Wno-error=deprecated-declarations
cflags-common += -Wno-error=cpp
endif #(!ERROR_DEPRECATED)
################################################################################
# Platform specific Makefile might provide us ARCH_MAJOR/MINOR use that to come
# up with appropriate march values for compiler.
################################################################################
include ${MAKE_HELPERS_DIRECTORY}march.mk
ifeq (${ARM_ARCH_MAJOR},7)
include make_helpers/armv7-a-cpus.mk
endif
ifneq ($(ENABLE_FEAT_MORELLO),0)
TF_CFLAGS += -march=morello
else
cflags-common += $(march-directive)
endif
ifneq ($(PIE_FOUND),)
cflags-common += -fno-PIE
endif
cflags-common += $(TF_CFLAGS_$(ARCH))
cflags-common += $(CPPFLAGS) $(CFLAGS) # some platforms set these
TF_CFLAGS += $(cflags-common)
TF_CFLAGS += $(target-flag-$(ARCH)-$($(ARCH)-cc-id))
TF_CFLAGS += $(cc-flags-$($(ARCH)-cc-id))
# it's logical to give the same flags to the linker when it's invoked through
# the compiler. This is requied for LTO to work correctly
ifeq ($($(ARCH)-ld-id),$($(ARCH)-cc-id))
TF_LDFLAGS += $(cflags-common)
TF_LDFLAGS += $(cc-flags-$($(ARCH)-ld-id))
TF_LDFLAGS += $(LTO_CFLAGS)
endif
TF_LDFLAGS += $(target-flag-$(ARCH)-$($(ARCH)-ld-id))
ASFLAGS += -Wa,--fatal-warnings
TF_LDFLAGS += -z noexecstack
# LD = armlink
ifeq ($($(ARCH)-ld-id),arm-link)
TF_LDFLAGS += --diag_error=warning --lto_level=O1
TF_LDFLAGS += --remove --info=unused,unusedsymbols
# LD = gcc or clang
else
ifeq ($($(ARCH)-ld-id),llvm-clang)
ldflags-common := -fuse-ld=lld
endif
ifeq ($(ENABLE_LTO),1)
ifeq ($($(ARCH)-ld-id),gnu-gcc)
ldflags-common += -flto-partition=one
endif
endif
ldflags-common += $(call ld_option,--no-warn-rwx-segments)
# ld.lld reports section type mismatch warnings,
# so don't add --fatal-warnings to it.
ifneq ($($(ARCH)-ld-id),$(filter $($(ARCH)-ld-id),llvm-clang llvm-lld))
ldflags-common += $(call ld_prefix,--fatal-warnings)
endif
ldflags-common += $(call ld_prefix,--gc-sections)
ldflags-common += -z common-page-size=4096 # Configure page size constants
ldflags-common += -z max-page-size=4096
ldflags-common += $(call ld_prefix,--build-id=none)
ldflags-common += $(call ld_option,--sort-section=alignment)
ifeq ($(ENABLE_LTO),1)
ldflags-common += -fuse-linker-plugin
endif #(ENABLE_LTO)
ldflags-common += -nostdlib
ifneq ($(call bool,$(USE_ROMLIB)),)
ldflags-common += @${BUILD_PLAT}/romlib/romlib.ldflags
endif
endif
# Errata build flags
ifneq ($(call bool,$(ERRATA_A53_843419)),)
ldflags-aarch64 += $(call ld_option,--fix-cortex-a53-843419)
else
# GCC automatically adds fix-cortex-a53-843419 flag when used to link
# which breaks some builds, so disable if errata fix is not explicitly enabled
ldflags-aarch64 += $(call ld_option,--no-fix-cortex-a53-843419)
endif
ifneq ($(call bool,$(ERRATA_A53_835769)),)
cflags-aarch64 += -mfix-cortex-a53-835769
ldflags-aarch64 += $(call ld_option,--fix-cortex-a53-835769)
endif
ifneq ($(PIE_FOUND),)
ifeq ($($(ARCH)-ld-id),gnu-gcc)
ldflags-common += -no-pie
endif
endif #(PIE_FOUND)
TF_LDFLAGS += $(ldflags-common)
TF_LDFLAGS += $(ldflags-$(ARCH))
PIE_LDFLAGS += $(call ld_prefix,-pie)
PIE_LDFLAGS += $(call ld_prefix,--no-dynamic-linker)
ifeq ($(ENABLE_PIE),1)
ifeq ($(RESET_TO_BL2),1)
ifneq ($(BL2_IN_XIP_MEM),1)
BL2_CPPFLAGS += -fpie
BL2_CFLAGS += -fpie
BL2_LDFLAGS += $(PIE_LDFLAGS)
endif #(BL2_IN_XIP_MEM)
endif #(RESET_TO_BL2)
BL31_CPPFLAGS += -fpie
BL31_CFLAGS += -fpie
BL31_LDFLAGS += $(PIE_LDFLAGS)
BL32_CPPFLAGS += -fpie
BL32_CFLAGS += -fpie
BL32_LDFLAGS += $(PIE_LDFLAGS)
endif #(ENABLE_PIE)
BL1_CPPFLAGS += -DREPORT_ERRATA=${DEBUG}
BL2_CPPFLAGS += -DREPORT_ERRATA=0
BL31_CPPFLAGS += -DREPORT_ERRATA=${DEBUG}
BL32_CPPFLAGS += -DREPORT_ERRATA=${DEBUG}
BL1_CPPFLAGS += -DIMAGE_AT_EL3
ifeq ($(BL2_RUNS_AT_EL3),1)
BL2_CPPFLAGS += -DIMAGE_AT_EL3
else
BL2_CPPFLAGS += -DIMAGE_AT_EL1
endif #(BL2_RUNS_AT_EL3)
ifeq (${ARCH},aarch64)
BL2U_CPPFLAGS += -DIMAGE_AT_EL1
BL31_CPPFLAGS += -DIMAGE_AT_EL3
BL32_CPPFLAGS += -DIMAGE_AT_EL1
else
BL32_CPPFLAGS += -DIMAGE_AT_EL3
endif
ifeq (${SPD},spmd)
ifeq ($(findstring optee_sp,$(ARM_SPMC_MANIFEST_DTS)),optee_sp)
DTC_CPPFLAGS += -DOPTEE_SP_FW_CONFIG
endif
ifeq ($(findstring trusty_sp,$(ARM_SPMC_MANIFEST_DTS)),trusty_sp)
DTC_CPPFLAGS += -DTRUSTY_SP_FW_CONFIG
endif
ifeq ($(TS_SP_FW_CONFIG),1)
DTC_CPPFLAGS += -DTS_SP_FW_CONFIG
endif
ifneq ($(ARM_BL2_SP_LIST_DTS),)
DTC_CPPFLAGS += -DARM_BL2_SP_LIST_DTS=$(ARM_BL2_SP_LIST_DTS)
endif
endif
DTC_FLAGS += -I dts -O dtb
DTC_CPPFLAGS += -Ifdts -undef
|
