1# 2# Copyright (c) 2025, Arm Limited. All rights reserved. 3# 4# SPDX-License-Identifier: BSD-3-Clause 5# 6 7GCC_V_OUTPUT := $(if $($(ARCH)-cc),$(shell $($(ARCH)-cc) -v 2>&1)) 8PIE_FOUND := $(findstring --enable-default-pie,${GCC_V_OUTPUT}) 9 10################################################################################ 11# Compiler Configuration based on ARCH_MAJOR and ARCH_MINOR flags 12################################################################################ 13ifeq (${ARM_ARCH_MAJOR},7) 14 target32-directive = -target arm-none-eabi 15# Will set march-directive from platform configuration 16else 17 target32-directive = -target armv8a-none-eabi 18endif #(ARM_ARCH_MAJOR) 19 20ifneq ($(filter %-clang,$($(ARCH)-cc-id)),) 21 ifeq ($($(ARCH)-cc-id),arm-clang) 22 TF_CFLAGS_aarch32 := -target arm-arm-none-eabi 23 TF_CFLAGS_aarch64 := -target aarch64-arm-none-eabi 24 else 25 TF_CFLAGS_aarch32 = $(target32-directive) 26 TF_CFLAGS_aarch64 := -target aarch64-elf 27 endif 28endif #(clang) 29 30# Process Debug flag 31ifneq (${DEBUG}, 0) 32 TF_CFLAGS += -g -gdwarf-4 33 ASFLAGS += -g -Wa,-gdwarf-4 34endif #(Debug) 35 36ifeq (${AARCH32_INSTRUCTION_SET},A32) 37 TF_CFLAGS_aarch32 += -marm 38else ifeq (${AARCH32_INSTRUCTION_SET},T32) 39 TF_CFLAGS_aarch32 += -mthumb 40endif #(AARCH32_INSTRUCTION_SET) 41 42TF_CFLAGS_aarch32 += -mno-unaligned-access 43TF_CFLAGS_aarch64 += -mgeneral-regs-only -mstrict-align 44 45############################################################################## 46# WARNINGS Configuration 47############################################################################### 48# General warnings 49WARNINGS := -Wall -Wmissing-include-dirs -Wunused \ 50 -Wdisabled-optimization -Wvla -Wshadow \ 51 -Wredundant-decls 52# stricter warnings 53WARNINGS += -Wextra -Wno-trigraphs 54# too verbose for generic build 55WARNINGS += -Wno-missing-field-initializers \ 56 -Wno-type-limits -Wno-sign-compare \ 57# on clang this flag gets reset if -Wextra is set after it. No difference on gcc 58WARNINGS += -Wno-unused-parameter 59 60# Additional warnings 61# Level 1 - infrequent warnings we should have none of 62# full -Wextra 63WARNING1 += -Wsign-compare 64WARNING1 += -Wtype-limits 65WARNING1 += -Wmissing-field-initializers 66 67# Level 2 - problematic warnings that we want 68# zlib, compiler-rt, coreboot, and mbdedtls blow up with these 69# TODO: disable just for them and move into default build 70WARNING2 += -Wold-style-definition 71WARNING2 += -Wmissing-prototypes 72WARNING2 += -Wmissing-format-attribute 73# TF-A aims to comply with this eventually. Effort too large at present 74WARNING2 += -Wundef 75# currently very involved and many platforms set this off 76WARNING2 += -Wunused-const-variable=2 77 78# Level 3 - very pedantic, frequently ignored 79WARNING3 := -Wbad-function-cast 80WARNING3 += -Waggregate-return 81WARNING3 += -Wnested-externs 82WARNING3 += -Wcast-align 83WARNING3 += -Wcast-qual 84WARNING3 += -Wconversion 85WARNING3 += -Wpacked 86WARNING3 += -Wpointer-arith 87WARNING3 += -Wswitch-default 88 89ifeq (${W},1) 90 WARNINGS += $(WARNING1) 91else ifeq (${W},2) 92 WARNINGS += $(WARNING1) $(WARNING2) 93else ifeq (${W},3) 94 WARNINGS += $(WARNING1) $(WARNING2) $(WARNING3) 95endif #(W) 96 97ifneq (${E},0) 98 ERRORS := -Werror 99endif #(E) 100 101# Compiler specific warnings 102ifeq ($(filter %-clang,$($(ARCH)-cc-id)),) 103# not using clang 104# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105523 105TF_CFLAGS_MIN_PAGE_SIZE := $(call cc_option, --param=min-pagesize=0) 106TF_CFLAGS += $(TF_CFLAGS_MIN_PAGE_SIZE) 107 108ifeq ($(HARDEN_SLS), 1) 109 TF_CFLAGS_MHARDEN_SLS := $(call cc_option, -mharden-sls=all) 110 TF_CFLAGS_aarch64 += $(TF_CFLAGS_MHARDEN_SLS) 111endif 112 113WARNINGS += -Wunused-but-set-variable -Wmaybe-uninitialized \ 114 -Wpacked-bitfield-compat -Wshift-overflow=2 \ 115 -Wlogical-op 116 117else 118# using clang 119WARNINGS += -Wshift-overflow -Wshift-sign-overflow \ 120 -Wlogical-op-parentheses 121endif #(Clang Warning) 122 123CPPFLAGS = ${DEFINES} ${INCLUDES} ${MBEDTLS_INC} -nostdinc \ 124 $(ERRORS) $(WARNINGS) 125 126 127TF_CFLAGS += -ffunction-sections -fdata-sections \ 128 -ffreestanding -fno-common \ 129 -Os -std=gnu99 130 131ifneq (${BP_OPTION},none) 132 TF_CFLAGS_aarch64 += -mbranch-protection=${BP_OPTION} 133endif #(BP_OPTION) 134 135ifeq (${SANITIZE_UB},on) 136 TF_CFLAGS += -fsanitize=undefined -fno-sanitize-recover 137endif #(${SANITIZE_UB},on) 138 139ifeq (${SANITIZE_UB},trap) 140 TF_CFLAGS += -fsanitize=undefined -fno-sanitize-recover \ 141 -fsanitize-undefined-trap-on-error 142endif #(${SANITIZE_UB},trap) 143 144ifeq ($($(ARCH)-cc-id),gnu-gcc) 145 # Enable LTO only for aarch64 146 LTO_CFLAGS = $(if $(filter-out 0,$(ENABLE_LTO)),-flto) 147endif #(gnu-gcc) 148 149ifeq (${ERROR_DEPRECATED},0) 150# Check if deprecated declarations and cpp warnings should be treated as error or not. 151ifneq ($(filter %-clang,$($(ARCH)-cc-id)),) 152 CPPFLAGS += -Wno-error=deprecated-declarations 153else 154 CPPFLAGS += -Wno-error=deprecated-declarations -Wno-error=cpp 155endif 156endif #(!ERROR_DEPRECATED) 157 158################################################################################ 159# Platform specific Makefile might provide us ARCH_MAJOR/MINOR use that to come 160# up with appropriate march values for compiler. 161################################################################################ 162include ${MAKE_HELPERS_DIRECTORY}march.mk 163ifeq (${ARM_ARCH_MAJOR},7) 164include make_helpers/armv7-a-cpus.mk 165endif 166 167TF_CFLAGS += $(march-directive) 168ASFLAGS += $(march-directive) 169 170ifneq ($(PIE_FOUND),) 171 TF_CFLAGS += -fno-PIE 172endif 173 174TF_CFLAGS += $(CPPFLAGS) $(TF_CFLAGS_$(ARCH)) 175ASFLAGS += $(CPPFLAGS) \ 176 -ffreestanding -Wa,--fatal-warnings 177TF_LDFLAGS += -z noexecstack 178 179# LD = armlink 180ifeq ($($(ARCH)-ld-id),arm-link) 181 TF_LDFLAGS += --diag_error=warning --lto_level=O1 182 TF_LDFLAGS += --remove --info=unused,unusedsymbols 183 TF_LDFLAGS += $(TF_LDFLAGS_$(ARCH)) 184 185# LD = gcc (used when GCC LTO is enabled) 186else ifeq ($($(ARCH)-ld-id),gnu-gcc) 187 # Pass ld options with Wl or Xlinker switches 188 TF_LDFLAGS += $(call ld_option,-Xlinker --no-warn-rwx-segments) 189 TF_LDFLAGS += -Wl,--fatal-warnings -O1 190 TF_LDFLAGS += -Wl,--gc-sections 191 192 TF_LDFLAGS += -Wl,-z,common-page-size=4096 #Configure page size constants 193 TF_LDFLAGS += -Wl,-z,max-page-size=4096 194 TF_LDFLAGS += -Wl,--build-id=none 195 196 ifeq ($(ENABLE_LTO),1) 197 TF_LDFLAGS += -flto -fuse-linker-plugin 198 TF_LDFLAGS += -flto-partition=one 199 endif #(ENABLE_LTO) 200 201# GCC automatically adds fix-cortex-a53-843419 flag when used to link 202# which breaks some builds, so disable if errata fix is not explicitly enabled 203 ifeq (${ARCH},aarch64) 204 ifneq (${ERRATA_A53_843419},1) 205 TF_LDFLAGS += -mno-fix-cortex-a53-843419 206 endif 207 endif 208 TF_LDFLAGS += -nostdlib 209 TF_LDFLAGS += $(subst --,-Xlinker --,$(TF_LDFLAGS_$(ARCH))) 210 211# LD = gcc-ld (ld) or llvm-ld (ld.lld) or other 212else 213# With ld.bfd version 2.39 and newer new warnings are added. Skip those since we 214# are not loaded by a elf loader. 215 TF_LDFLAGS += $(call ld_option, --no-warn-rwx-segments) 216 TF_LDFLAGS += -O1 217 TF_LDFLAGS += --gc-sections 218 219 TF_LDFLAGS += -z common-page-size=4096 # Configure page size constants 220 TF_LDFLAGS += -z max-page-size=4096 221 TF_LDFLAGS += --build-id=none 222 223# ld.lld doesn't recognize the errata flags, 224# therefore don't add those in that case. 225# ld.lld reports section type mismatch warnings, 226# therefore don't add --fatal-warnings to it. 227 ifneq ($($(ARCH)-ld-id),llvm-lld) 228 TF_LDFLAGS += $(TF_LDFLAGS_$(ARCH)) --fatal-warnings 229 endif 230 231endif #(LD = armlink) 232 233ifneq ($(PIE_FOUND),) 234ifeq ($($(ARCH)-ld-id),gnu-gcc) 235 TF_LDFLAGS += -no-pie 236endif 237endif #(PIE_FOUND) 238 239ifeq ($($(ARCH)-ld-id),gnu-gcc) 240 PIE_LDFLAGS += -Wl,-pie -Wl,--no-dynamic-linker 241else 242 PIE_LDFLAGS += -pie --no-dynamic-linker 243endif 244 245ifeq ($(ENABLE_PIE),1) 246 ifeq ($(RESET_TO_BL2),1) 247 ifneq ($(BL2_IN_XIP_MEM),1) 248 BL2_CPPFLAGS += -fpie 249 BL2_CFLAGS += -fpie 250 BL2_LDFLAGS += $(PIE_LDFLAGS) 251 endif #(BL2_IN_XIP_MEM) 252 endif #(RESET_TO_BL2) 253 BL31_CPPFLAGS += -fpie 254 BL31_CFLAGS += -fpie 255 BL31_LDFLAGS += $(PIE_LDFLAGS) 256 257 BL32_CPPFLAGS += -fpie 258 BL32_CFLAGS += -fpie 259 BL32_LDFLAGS += $(PIE_LDFLAGS) 260endif #(ENABLE_PIE) 261 262BL1_CPPFLAGS += -DREPORT_ERRATA=${DEBUG} 263BL31_CPPFLAGS += -DREPORT_ERRATA=${DEBUG} 264BL32_CPPFLAGS += -DREPORT_ERRATA=${DEBUG} 265 266BL1_CPPFLAGS += -DIMAGE_AT_EL3 267ifeq ($(RESET_TO_BL2),1) 268 BL2_CPPFLAGS += -DIMAGE_AT_EL3 269else 270 BL2_CPPFLAGS += -DIMAGE_AT_EL1 271endif #(RESET_TO_BL2) 272 273ifeq (${ARCH},aarch64) 274 BL2U_CPPFLAGS += -DIMAGE_AT_EL1 275 BL31_CPPFLAGS += -DIMAGE_AT_EL3 276 BL32_CPPFLAGS += -DIMAGE_AT_EL1 277else 278 BL32_CPPFLAGS += -DIMAGE_AT_EL3 279endif 280 281ifeq (${SPD},spmd) 282 ifeq ($(findstring optee_sp,$(ARM_SPMC_MANIFEST_DTS)),optee_sp) 283 DTC_CPPFLAGS += -DOPTEE_SP_FW_CONFIG 284 endif 285 286 ifeq ($(findstring trusty_sp,$(ARM_SPMC_MANIFEST_DTS)),trusty_sp) 287 DTC_CPPFLAGS += -DTRUSTY_SP_FW_CONFIG 288 endif 289 290 ifeq ($(TS_SP_FW_CONFIG),1) 291 DTC_CPPFLAGS += -DTS_SP_FW_CONFIG 292 endif 293 294 ifneq ($(ARM_BL2_SP_LIST_DTS),) 295 DTC_CPPFLAGS += -DARM_BL2_SP_LIST_DTS=$(ARM_BL2_SP_LIST_DTS) 296 endif 297endif 298 299 300DTC_FLAGS += -I dts -O dtb 301DTC_CPPFLAGS += -Ifdts -undef 302 303