TARGET_linux-arm.mk revision 9696acae02dfbf86ad5adb39682ff2e72f256226
1# 2# Copyright (C) 2006 The Android Open Source Project 3# 4# Licensed under the Apache License, Version 2.0 (the "License"); 5# you may not use this file except in compliance with the License. 6# You may obtain a copy of the License at 7# 8# http://www.apache.org/licenses/LICENSE-2.0 9# 10# Unless required by applicable law or agreed to in writing, software 11# distributed under the License is distributed on an "AS IS" BASIS, 12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13# See the License for the specific language governing permissions and 14# limitations under the License. 15# 16 17# Configuration for Linux on ARM. 18# Included by combo/select.mk 19 20# You can set TARGET_ARCH_VARIANT to use an arch version other 21# than ARMv5TE. Each value should correspond to a file named 22# $(BUILD_COMBOS)/arch/<name>.mk which must contain 23# makefile variable definitions similar to the preprocessor 24# defines in build/core/combo/include/arch/<combo>/AndroidConfig.h. Their 25# purpose is to allow module Android.mk files to selectively compile 26# different versions of code based upon the funtionality and 27# instructions available in a given architecture version. 28# 29# The blocks also define specific arch_variant_cflags, which 30# include defines, and compiler settings for the given architecture 31# version. 32# 33ifeq ($(strip $(TARGET_ARCH_VARIANT)),) 34TARGET_ARCH_VARIANT := armv5te 35endif 36 37ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 38TARGET_GCC_VERSION := 4.8 39else 40TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 41endif 42 43TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 44ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 45$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT)) 46endif 47 48include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 49 50# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 51ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 52TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$(TARGET_GCC_VERSION) 53TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi- 54endif 55 56TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 57TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 58TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 59TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 60TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 61TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 62ifeq ($(TARGET_BUILD_VARIANT),user) 63 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ 64else 65 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ && \ 66 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 67endif 68 69TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 70 71TARGET_arm_CFLAGS := -O2 \ 72 -fomit-frame-pointer \ 73 -fstrict-aliasing \ 74 -funswitch-loops 75 76# Modules can choose to compile some source as thumb. 77TARGET_thumb_CFLAGS := -mthumb \ 78 -Os \ 79 -fomit-frame-pointer \ 80 -fno-strict-aliasing 81 82# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 83# or in your environment to force a full arm build, even for 84# files that are normally built as thumb; this can make 85# gdb debugging easier. Don't forget to do a clean build. 86# 87# NOTE: if you try to build a -O0 build with thumb, several 88# of the libraries (libpv, libwebcore, libkjs) need to be built 89# with -mlong-calls. When built at -O0, those libraries are 90# too big for a thumb "BL <label>" to go from one end to the other. 91ifeq ($(FORCE_ARM_DEBUGGING),true) 92 TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 93 TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 94endif 95 96android_config_h := $(call select-android-config-h,linux-arm) 97 98TARGET_GLOBAL_CFLAGS += \ 99 -msoft-float -fpic -fPIE \ 100 -ffunction-sections \ 101 -fdata-sections \ 102 -funwind-tables \ 103 -fstack-protector \ 104 -Wa,--noexecstack \ 105 -Werror=format-security \ 106 -D_FORTIFY_SOURCE=2 \ 107 -fno-short-enums \ 108 $(arch_variant_cflags) \ 109 -include $(android_config_h) \ 110 -I $(dir $(android_config_h)) 111 112# The "-Wunused-but-set-variable" option often breaks projects that enable 113# "-Wall -Werror" due to a commom idiom "ALOGV(mesg)" where ALOGV is turned 114# into no-op in some builds while mesg is defined earlier. So we explicitly 115# disable "-Wunused-but-set-variable" here. 116ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8, $(TARGET_GCC_VERSION)),) 117TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable -fno-builtin-sin \ 118 -fno-strict-volatile-bitfields 119endif 120 121# This is to avoid the dreaded warning compiler message: 122# note: the mangling of 'va_list' has changed in GCC 4.4 123# 124# The fact that the mangling changed does not affect the NDK ABI 125# very fortunately (since none of the exposed APIs used va_list 126# in their exported C++ functions). Also, GCC 4.5 has already 127# removed the warning from the compiler. 128# 129TARGET_GLOBAL_CFLAGS += -Wno-psabi 130 131TARGET_GLOBAL_LDFLAGS += \ 132 -Wl,-z,noexecstack \ 133 -Wl,-z,relro \ 134 -Wl,-z,now \ 135 -Wl,--warn-shared-textrel \ 136 -Wl,--fatal-warnings \ 137 -Wl,--icf=safe \ 138 $(arch_variant_ldflags) 139 140TARGET_GLOBAL_CFLAGS += -mthumb-interwork 141 142TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 143 144# More flags/options can be added here 145TARGET_RELEASE_CFLAGS := \ 146 -DNDEBUG \ 147 -g \ 148 -Wstrict-aliasing=2 \ 149 -fgcse-after-reload \ 150 -frerun-cse-after-loop \ 151 -frename-registers 152 153libc_root := bionic/libc 154libm_root := bionic/libm 155libstdc++_root := bionic/libstdc++ 156libthread_db_root := bionic/libthread_db 157 158 159## on some hosts, the target cross-compiler is not available so do not run this command 160ifneq ($(wildcard $(TARGET_CC)),) 161# We compile with the global cflags to ensure that 162# any flags which affect libgcc are correctly taken 163# into account. 164TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 165target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 166 -print-file-name=libgcov.a) 167endif 168 169# Define FDO (Feedback Directed Optimization) options. 170 171TARGET_FDO_CFLAGS:= 172TARGET_FDO_LIB:= 173 174ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 175 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 176 # The profile will be generated on /data/local/tmp/profile on the device. 177 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 178 TARGET_FDO_LIB := $(target_libgcov) 179else 180 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 181 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 182 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 183 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 184 else 185 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 186 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 187 endif 188 endif 189 190 # If the FDO profile directory can't be found, then FDO is off. 191 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 192 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 193 TARGET_FDO_LIB := $(target_libgcov) 194 endif 195endif 196 197 198# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 199# symlinks located in out/ to point to the appropriate kernel 200# headers. see 'config/kernel_headers.make' for more details 201# 202ifneq ($(CUSTOM_KERNEL_HEADERS),) 203 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 204 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 205else 206 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 207 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 208 KERNEL_HEADERS_AUX := $(libc_root)/kernel/uapi # for kexec.h 209endif 210KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) $(KERNEL_HEADERS_AUX) 211 212TARGET_C_INCLUDES := \ 213 $(libc_root)/arch-arm/include \ 214 $(libc_root)/include \ 215 $(libstdc++_root)/include \ 216 $(KERNEL_HEADERS) \ 217 $(libm_root)/include \ 218 $(libm_root)/include/arm \ 219 $(libthread_db_root)/include 220 221TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 222TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 223TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 224 225TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 226TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 227 228TARGET_STRIP_MODULE:=true 229 230TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 231 232TARGET_CUSTOM_LD_COMMAND := true 233 234define transform-o-to-shared-lib-inner 235$(hide) $(PRIVATE_CXX) \ 236 -nostdlib -Wl,-soname,$(notdir $@) \ 237 -Wl,--gc-sections \ 238 -Wl,-shared,-Bsymbolic \ 239 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 240 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 241 $(PRIVATE_ALL_OBJECTS) \ 242 -Wl,--whole-archive \ 243 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 244 -Wl,--no-whole-archive \ 245 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 246 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 247 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 248 $(if $(TARGET_BUILD_APPS),$(PRIVATE_TARGET_LIBGCC)) \ 249 $(PRIVATE_TARGET_FDO_LIB) \ 250 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 251 -o $@ \ 252 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 253 $(PRIVATE_LDFLAGS) \ 254 $(PRIVATE_TARGET_LIBGCC) \ 255 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 256endef 257 258define transform-o-to-executable-inner 259$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \ 260 -Wl,-dynamic-linker,/system/bin/linker \ 261 -Wl,--gc-sections \ 262 -Wl,-z,nocopyreloc \ 263 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 264 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 265 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \ 266 $(PRIVATE_ALL_OBJECTS) \ 267 -Wl,--whole-archive \ 268 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 269 -Wl,--no-whole-archive \ 270 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 271 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 272 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 273 $(if $(TARGET_BUILD_APPS),$(PRIVATE_TARGET_LIBGCC)) \ 274 $(PRIVATE_TARGET_FDO_LIB) \ 275 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 276 -o $@ \ 277 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 278 $(PRIVATE_LDFLAGS) \ 279 $(PRIVATE_TARGET_LIBGCC) \ 280 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 281endef 282 283define transform-o-to-static-executable-inner 284$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \ 285 -Wl,--gc-sections \ 286 -o $@ \ 287 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 288 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \ 289 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 290 $(PRIVATE_LDFLAGS) \ 291 $(PRIVATE_ALL_OBJECTS) \ 292 -Wl,--whole-archive \ 293 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 294 -Wl,--no-whole-archive \ 295 $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \ 296 -Wl,--start-group \ 297 $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 298 $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 299 $(PRIVATE_TARGET_FDO_LIB) \ 300 $(PRIVATE_TARGET_LIBGCC) \ 301 -Wl,--end-group \ 302 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 303endef 304