TARGET_linux-arm.mk revision 054ffd2e7c3da585ab223518569e7436858ba5e0
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)),) 38TARGET_GCC_VERSION := 4.6 39endif 40 41TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 42ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 43$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT)) 44endif 45 46include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 47 48# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 49ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 50TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$(TARGET_GCC_VERSION) 51TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi- 52endif 53 54# Only define these if there's actually a gcc in there. 55# The gcc toolchain does not exists for windows/cygwin. In this case, do not reference it. 56ifneq ($(wildcard $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)),) 57 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 58 TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 59 TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 60 TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 61 TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 62 TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 63 ifeq ($(TARGET_BUILD_VARIANT),user) 64 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ 65 else 66 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ && \ 67 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 68 endif 69endif 70 71TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 72 73TARGET_arm_CFLAGS := -O2 \ 74 -fomit-frame-pointer \ 75 -fstrict-aliasing \ 76 -funswitch-loops 77 78# Modules can choose to compile some source as thumb. As 79# non-thumb enabled targets are supported, this is treated 80# as a 'hint'. If thumb is not enabled, these files are just 81# compiled as ARM. 82ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 83TARGET_thumb_CFLAGS := -mthumb \ 84 -Os \ 85 -fomit-frame-pointer \ 86 -fno-strict-aliasing 87else 88TARGET_thumb_CFLAGS := $(TARGET_arm_CFLAGS) 89endif 90 91# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 92# or in your environment to force a full arm build, even for 93# files that are normally built as thumb; this can make 94# gdb debugging easier. Don't forget to do a clean build. 95# 96# NOTE: if you try to build a -O0 build with thumb, several 97# of the libraries (libpv, libwebcore, libkjs) need to be built 98# with -mlong-calls. When built at -O0, those libraries are 99# too big for a thumb "BL <label>" to go from one end to the other. 100ifeq ($(FORCE_ARM_DEBUGGING),true) 101 TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 102 TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 103endif 104 105TARGET_GLOBAL_CFLAGS += \ 106 -msoft-float -fpic -fPIE \ 107 -ffunction-sections \ 108 -fdata-sections \ 109 -funwind-tables \ 110 -fstack-protector \ 111 -Wa,--noexecstack \ 112 -Werror=format-security \ 113 -D_FORTIFY_SOURCE=1 \ 114 -fno-short-enums \ 115 $(arch_variant_cflags) 116 117android_config_h := $(call select-android-config-h,linux-arm) 118TARGET_ANDROID_CONFIG_CFLAGS := -include $(android_config_h) -I $(dir $(android_config_h)) 119TARGET_GLOBAL_CFLAGS += $(TARGET_ANDROID_CONFIG_CFLAGS) 120 121# This warning causes dalvik not to build with gcc 4.6+ and -Werror. 122# We cannot turn it off blindly since the option is not available 123# in gcc-4.4.x. We also want to disable sincos optimization globally 124# by turning off the builtin sin function. 125ifneq ($(filter 4.6 4.6.% 4.7 4.7.%, $(shell $(TARGET_CC) --version)),) 126TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable -fno-builtin-sin \ 127 -fno-strict-volatile-bitfields 128endif 129 130# This is to avoid the dreaded warning compiler message: 131# note: the mangling of 'va_list' has changed in GCC 4.4 132# 133# The fact that the mangling changed does not affect the NDK ABI 134# very fortunately (since none of the exposed APIs used va_list 135# in their exported C++ functions). Also, GCC 4.5 has already 136# removed the warning from the compiler. 137# 138TARGET_GLOBAL_CFLAGS += -Wno-psabi 139 140TARGET_GLOBAL_LDFLAGS += \ 141 -Wl,-z,noexecstack \ 142 -Wl,-z,relro \ 143 -Wl,-z,now \ 144 -Wl,--warn-shared-textrel \ 145 -Wl,--icf=safe \ 146 $(arch_variant_ldflags) 147 148# We only need thumb interworking in cases where thumb support 149# is available in the architecture, and just to be sure, (and 150# since sometimes thumb-interwork appears to be default), we 151# specifically disable when thumb support is unavailable. 152ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 153TARGET_GLOBAL_CFLAGS += -mthumb-interwork 154else 155TARGET_GLOBAL_CFLAGS += -mno-thumb-interwork 156endif 157 158TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 159 160# More flags/options can be added here 161TARGET_RELEASE_CFLAGS := \ 162 -DNDEBUG \ 163 -g \ 164 -Wstrict-aliasing=2 \ 165 -fgcse-after-reload \ 166 -frerun-cse-after-loop \ 167 -frename-registers 168 169libc_root := bionic/libc 170libm_root := bionic/libm 171libstdc++_root := bionic/libstdc++ 172libthread_db_root := bionic/libthread_db 173 174 175## on some hosts, the target cross-compiler is not available so do not run this command 176ifneq ($(wildcard $(TARGET_CC)),) 177# We compile with the global cflags to ensure that 178# any flags which affect libgcc are correctly taken 179# into account. 180TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 181endif 182 183# Define FDO (Feedback Directed Optimization) options. 184 185TARGET_FDO_CFLAGS:= 186TARGET_FDO_LIB:= 187 188target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 189 -print-file-name=libgcov.a) 190ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 191 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 192 # The profile will be generated on /data/local/tmp/profile on the device. 193 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 194 TARGET_FDO_LIB := $(target_libgcov) 195else 196 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 197 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 198 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 199 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 200 else 201 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 202 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 203 endif 204 endif 205 206 # If the FDO profile directory can't be found, then FDO is off. 207 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 208 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 209 TARGET_FDO_LIB := $(target_libgcov) 210 endif 211endif 212 213 214# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 215# symlinks located in out/ to point to the appropriate kernel 216# headers. see 'config/kernel_headers.make' for more details 217# 218ifneq ($(CUSTOM_KERNEL_HEADERS),) 219 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 220 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 221else 222 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 223 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 224endif 225KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 226 227TARGET_C_INCLUDES := \ 228 $(libc_root)/arch-arm/include \ 229 $(libc_root)/include \ 230 $(libstdc++_root)/include \ 231 $(KERNEL_HEADERS) \ 232 $(libm_root)/include \ 233 $(libm_root)/include/arm \ 234 $(libthread_db_root)/include 235 236TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 237TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 238TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 239 240TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 241TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 242 243TARGET_STRIP_MODULE:=true 244 245TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 246 247TARGET_CUSTOM_LD_COMMAND := true 248 249define transform-o-to-shared-lib-inner 250$(hide) $(PRIVATE_CXX) \ 251 -nostdlib -Wl,-soname,$(notdir $@) \ 252 -Wl,--gc-sections \ 253 -Wl,-shared,-Bsymbolic \ 254 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 255 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 256 $(PRIVATE_ALL_OBJECTS) \ 257 -Wl,--whole-archive \ 258 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 259 -Wl,--no-whole-archive \ 260 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 261 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 262 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 263 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 264 -o $@ \ 265 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 266 $(PRIVATE_LDFLAGS) \ 267 $(PRIVATE_TARGET_FDO_LIB) \ 268 $(PRIVATE_TARGET_LIBGCC) \ 269 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 270endef 271 272define transform-o-to-executable-inner 273$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \ 274 -Wl,-dynamic-linker,/system/bin/linker \ 275 -Wl,--gc-sections \ 276 -Wl,-z,nocopyreloc \ 277 -o $@ \ 278 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 279 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 280 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 281 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \ 282 $(PRIVATE_ALL_OBJECTS) \ 283 -Wl,--whole-archive \ 284 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 285 -Wl,--no-whole-archive \ 286 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 287 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 288 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 289 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 290 $(PRIVATE_LDFLAGS) \ 291 $(PRIVATE_TARGET_FDO_LIB) \ 292 $(PRIVATE_TARGET_LIBGCC) \ 293 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 294endef 295 296define transform-o-to-static-executable-inner 297$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \ 298 -Wl,--gc-sections \ 299 -o $@ \ 300 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 301 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \ 302 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 303 $(PRIVATE_LDFLAGS) \ 304 $(PRIVATE_ALL_OBJECTS) \ 305 -Wl,--whole-archive \ 306 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 307 -Wl,--no-whole-archive \ 308 $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \ 309 -Wl,--start-group \ 310 $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 311 $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 312 $(PRIVATE_TARGET_FDO_LIB) \ 313 $(PRIVATE_TARGET_LIBGCC) \ 314 -Wl,--end-group \ 315 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 316endef 317