TARGET_linux-arm.mk revision 6c7bc550adb917157a9f53ebf8898110e37294b2
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 := 4.7 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 := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi- 54endif 55 56# Only define these if there's actually a gcc in there. 57# The gcc toolchain does not exists for windows/cygwin. In this case, do not reference it. 58ifneq ($(wildcard $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)),) 59 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 60 TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 61 TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 62 TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 63 TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 64 TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 65 ifeq ($(TARGET_BUILD_VARIANT),user) 66 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ 67 else 68 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ && \ 69 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 70 endif 71endif 72 73TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 74 75TARGET_arm_CFLAGS := -O2 \ 76 -fomit-frame-pointer \ 77 -fstrict-aliasing \ 78 -funswitch-loops 79 80# Modules can choose to compile some source as thumb. 81TARGET_thumb_CFLAGS := -mthumb \ 82 -Os \ 83 -fomit-frame-pointer \ 84 -fno-strict-aliasing 85 86# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 87# or in your environment to force a full arm build, even for 88# files that are normally built as thumb; this can make 89# gdb debugging easier. Don't forget to do a clean build. 90# 91# NOTE: if you try to build a -O0 build with thumb, several 92# of the libraries (libpv, libwebcore, libkjs) need to be built 93# with -mlong-calls. When built at -O0, those libraries are 94# too big for a thumb "BL <label>" to go from one end to the other. 95ifeq ($(FORCE_ARM_DEBUGGING),true) 96 TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 97 TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 98endif 99 100TARGET_GLOBAL_CFLAGS += \ 101 -msoft-float -fpic -fPIE \ 102 -ffunction-sections \ 103 -fdata-sections \ 104 -funwind-tables \ 105 -fstack-protector \ 106 -Wa,--noexecstack \ 107 -Werror=format-security \ 108 -D_FORTIFY_SOURCE=1 \ 109 -fno-short-enums \ 110 $(arch_variant_cflags) 111 112android_config_h := $(call select-android-config-h,linux-arm) 113TARGET_ANDROID_CONFIG_CFLAGS := -include $(android_config_h) -I $(dir $(android_config_h)) 114TARGET_GLOBAL_CFLAGS += $(TARGET_ANDROID_CONFIG_CFLAGS) 115 116# This warning causes dalvik not to build with gcc 4.6+ and -Werror. 117# We cannot turn it off blindly since the option is not available 118# in gcc-4.4.x. We also want to disable sincos optimization globally 119# by turning off the builtin sin function. 120ifneq ($(filter 4.6 4.6.% 4.7 4.7.%, $(shell $(TARGET_CC) --version)),) 121TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable -fno-builtin-sin \ 122 -fno-strict-volatile-bitfields 123endif 124 125# This is to avoid the dreaded warning compiler message: 126# note: the mangling of 'va_list' has changed in GCC 4.4 127# 128# The fact that the mangling changed does not affect the NDK ABI 129# very fortunately (since none of the exposed APIs used va_list 130# in their exported C++ functions). Also, GCC 4.5 has already 131# removed the warning from the compiler. 132# 133TARGET_GLOBAL_CFLAGS += -Wno-psabi 134 135TARGET_GLOBAL_LDFLAGS += \ 136 -Wl,-z,noexecstack \ 137 -Wl,-z,relro \ 138 -Wl,-z,now \ 139 -Wl,--warn-shared-textrel \ 140 -Wl,--icf=safe \ 141 $(arch_variant_ldflags) 142 143TARGET_GLOBAL_CFLAGS += -mthumb-interwork 144 145TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 146 147# More flags/options can be added here 148TARGET_RELEASE_CFLAGS := \ 149 -DNDEBUG \ 150 -g \ 151 -Wstrict-aliasing=2 \ 152 -fgcse-after-reload \ 153 -frerun-cse-after-loop \ 154 -frename-registers 155 156libc_root := bionic/libc 157libm_root := bionic/libm 158libstdc++_root := bionic/libstdc++ 159libthread_db_root := bionic/libthread_db 160 161 162## on some hosts, the target cross-compiler is not available so do not run this command 163ifneq ($(wildcard $(TARGET_CC)),) 164# We compile with the global cflags to ensure that 165# any flags which affect libgcc are correctly taken 166# into account. 167TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 168endif 169 170# Define FDO (Feedback Directed Optimization) options. 171 172TARGET_FDO_CFLAGS:= 173TARGET_FDO_LIB:= 174 175target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 176 -print-file-name=libgcov.a) 177ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 178 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 179 # The profile will be generated on /data/local/tmp/profile on the device. 180 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 181 TARGET_FDO_LIB := $(target_libgcov) 182else 183 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 184 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 185 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 186 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 187 else 188 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 189 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 190 endif 191 endif 192 193 # If the FDO profile directory can't be found, then FDO is off. 194 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 195 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 196 TARGET_FDO_LIB := $(target_libgcov) 197 endif 198endif 199 200 201# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 202# symlinks located in out/ to point to the appropriate kernel 203# headers. see 'config/kernel_headers.make' for more details 204# 205ifneq ($(CUSTOM_KERNEL_HEADERS),) 206 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 207 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 208else 209 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 210 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 211endif 212KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 213 214TARGET_C_INCLUDES := \ 215 $(libc_root)/arch-arm/include \ 216 $(libc_root)/include \ 217 $(libstdc++_root)/include \ 218 $(KERNEL_HEADERS) \ 219 $(libm_root)/include \ 220 $(libm_root)/include/arm \ 221 $(libthread_db_root)/include 222 223TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 224TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 225TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 226 227TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 228TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 229 230TARGET_STRIP_MODULE:=true 231 232TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 233 234TARGET_CUSTOM_LD_COMMAND := true 235 236define transform-o-to-shared-lib-inner 237$(hide) $(PRIVATE_CXX) \ 238 -nostdlib -Wl,-soname,$(notdir $@) \ 239 -Wl,--gc-sections \ 240 -Wl,-shared,-Bsymbolic \ 241 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 242 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 243 $(PRIVATE_ALL_OBJECTS) \ 244 -Wl,--whole-archive \ 245 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 246 -Wl,--no-whole-archive \ 247 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 248 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 249 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 250 $(PRIVATE_TARGET_LIBGCC) \ 251 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 252 -o $@ \ 253 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 254 $(PRIVATE_LDFLAGS) \ 255 $(PRIVATE_TARGET_FDO_LIB) \ 256 $(PRIVATE_TARGET_LIBGCC) \ 257 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 258endef 259 260define transform-o-to-executable-inner 261$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \ 262 -Wl,-dynamic-linker,/system/bin/linker \ 263 -Wl,--gc-sections \ 264 -Wl,-z,nocopyreloc \ 265 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 266 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 267 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \ 268 $(PRIVATE_ALL_OBJECTS) \ 269 -Wl,--whole-archive \ 270 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 271 -Wl,--no-whole-archive \ 272 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 273 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 274 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 275 $(PRIVATE_TARGET_LIBGCC) \ 276 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 277 -o $@ \ 278 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 279 $(PRIVATE_LDFLAGS) \ 280 $(PRIVATE_TARGET_FDO_LIB) \ 281 $(PRIVATE_TARGET_LIBGCC) \ 282 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 283endef 284 285define transform-o-to-static-executable-inner 286$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \ 287 -Wl,--gc-sections \ 288 -o $@ \ 289 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 290 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \ 291 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 292 $(PRIVATE_LDFLAGS) \ 293 $(PRIVATE_ALL_OBJECTS) \ 294 -Wl,--whole-archive \ 295 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 296 -Wl,--no-whole-archive \ 297 $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \ 298 -Wl,--start-group \ 299 $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 300 $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 301 $(PRIVATE_TARGET_FDO_LIB) \ 302 $(PRIVATE_TARGET_LIBGCC) \ 303 -Wl,--end-group \ 304 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 305endef 306