TARGET_linux-arm.mk revision a50ef1c12441d9eccfa75409c1392befaf2abed5
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# $(BUILD_COMBOS)/arch/<name>.mk which must contain 23# makefile variable definitions similar to the preprocessor 24# defines in system/core/include/arch/<combo>/AndroidConfig.h. Their 25# purpose is to allow module Android.mk files to selectively compile 26# different versions of code based upon the funtionality and 27# instructions available in a given architecture version. 28# 29# The blocks also define specific arch_variant_cflags, which 30# include defines, and compiler settings for the given architecture 31# version. 32# 33ifeq ($(strip $(TARGET_ARCH_VARIANT)),) 34TARGET_ARCH_VARIANT := armv5te 35endif 36 37TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 38ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 39$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT)) 40endif 41 42include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 43 44# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 45ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 46TARGET_TOOLS_PREFIX := \ 47 prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6/bin/arm-linux-androideabi- 48endif 49 50# Only define these if there's actually a gcc in there. 51# The gcc toolchain does not exists for windows/cygwin. In this case, do not reference it. 52ifneq ($(wildcard $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)),) 53 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 54 TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 55 TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 56 TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 57 TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 58 TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 59 ifeq ($(TARGET_BUILD_VARIANT),user) 60 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ 61 else 62 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ && \ 63 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 64 endif 65endif 66 67TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 68 69TARGET_arm_CFLAGS := -O2 \ 70 -fomit-frame-pointer \ 71 -fstrict-aliasing \ 72 -funswitch-loops 73 74# Modules can choose to compile some source as thumb. As 75# non-thumb enabled targets are supported, this is treated 76# as a 'hint'. If thumb is not enabled, these files are just 77# compiled as ARM. 78ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 79TARGET_thumb_CFLAGS := -mthumb \ 80 -Os \ 81 -fomit-frame-pointer \ 82 -fno-strict-aliasing 83else 84TARGET_thumb_CFLAGS := $(TARGET_arm_CFLAGS) 85endif 86 87# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 88# or in your environment to force a full arm build, even for 89# files that are normally built as thumb; this can make 90# gdb debugging easier. Don't forget to do a clean build. 91# 92# NOTE: if you try to build a -O0 build with thumb, several 93# of the libraries (libpv, libwebcore, libkjs) need to be built 94# with -mlong-calls. When built at -O0, those libraries are 95# too big for a thumb "BL <label>" to go from one end to the other. 96ifeq ($(FORCE_ARM_DEBUGGING),true) 97 TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 98 TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 99endif 100 101android_config_h := $(call select-android-config-h,linux-arm) 102arch_include_dir := $(dir $(android_config_h)) 103 104TARGET_GLOBAL_CFLAGS += \ 105 -msoft-float -fpic \ 106 -ffunction-sections \ 107 -fdata-sections \ 108 -funwind-tables \ 109 -fstack-protector \ 110 -Wa,--noexecstack \ 111 -Werror=format-security \ 112 -fno-short-enums \ 113 $(arch_variant_cflags) \ 114 -include $(android_config_h) \ 115 -I $(arch_include_dir) 116 117# This warning causes dalvik not to build with gcc 4.6.x and -Werror. 118# We cannot turn it off blindly since the option is not available 119# in gcc-4.4.x. We also want to disable sincos optimization globally 120# by turning off the builtin sin function. 121ifneq ($(filter 4.6.%, $(shell $(TARGET_CC) --version)),) 122TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable -fno-builtin-sin \ 123 -fno-strict-volatile-bitfields 124endif 125 126# This is to avoid the dreaded warning compiler message: 127# note: the mangling of 'va_list' has changed in GCC 4.4 128# 129# The fact that the mangling changed does not affect the NDK ABI 130# very fortunately (since none of the exposed APIs used va_list 131# in their exported C++ functions). Also, GCC 4.5 has already 132# removed the warning from the compiler. 133# 134TARGET_GLOBAL_CFLAGS += -Wno-psabi 135 136TARGET_GLOBAL_LDFLAGS += \ 137 -Wl,-z,noexecstack \ 138 -Wl,--icf=safe \ 139 $(arch_variant_ldflags) 140 141# We only need thumb interworking in cases where thumb support 142# is available in the architecture, and just to be sure, (and 143# since sometimes thumb-interwork appears to be default), we 144# specifically disable when thumb support is unavailable. 145ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 146TARGET_GLOBAL_CFLAGS += -mthumb-interwork 147else 148TARGET_GLOBAL_CFLAGS += -mno-thumb-interwork 149endif 150 151TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 152 153# More flags/options can be added here 154TARGET_RELEASE_CFLAGS := \ 155 -DNDEBUG \ 156 -g \ 157 -Wstrict-aliasing=2 \ 158 -fgcse-after-reload \ 159 -frerun-cse-after-loop \ 160 -frename-registers 161 162libc_root := bionic/libc 163libm_root := bionic/libm 164libstdc++_root := bionic/libstdc++ 165libthread_db_root := bionic/libthread_db 166 167 168## on some hosts, the target cross-compiler is not available so do not run this command 169ifneq ($(wildcard $(TARGET_CC)),) 170# We compile with the global cflags to ensure that 171# any flags which affect libgcc are correctly taken 172# into account. 173TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 174endif 175 176# Define FDO (Feedback Directed Optimization) options. 177 178TARGET_FDO_CFLAGS:= 179TARGET_FDO_LIB:= 180 181target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 182 --print-file-name=libgcov.a) 183ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 184 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 185 # The profile will be generated on /data/local/tmp/profile on the device. 186 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 187 TARGET_FDO_LIB := $(target_libgcov) 188else 189 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 190 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 191 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 192 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 193 else 194 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 195 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 196 endif 197 endif 198 199 # If the FDO profile directory can't be found, then FDO is off. 200 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 201 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 202 TARGET_FDO_LIB := $(target_libgcov) 203 endif 204endif 205 206 207# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 208# symlinks located in out/ to point to the appropriate kernel 209# headers. see 'config/kernel_headers.make' for more details 210# 211ifneq ($(CUSTOM_KERNEL_HEADERS),) 212 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 213 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 214else 215 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 216 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 217endif 218KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 219 220TARGET_C_INCLUDES := \ 221 $(libc_root)/arch-arm/include \ 222 $(libc_root)/include \ 223 $(libstdc++_root)/include \ 224 $(KERNEL_HEADERS) \ 225 $(libm_root)/include \ 226 $(libm_root)/include/arm \ 227 $(libthread_db_root)/include 228 229TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o 230TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o 231TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o 232 233TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_so.o 234TARGET_CRTEND_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_so.o 235 236TARGET_STRIP_MODULE:=true 237 238TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 239 240TARGET_CUSTOM_LD_COMMAND := true 241 242# Enable the Dalvik JIT compiler if not already specified. 243ifeq ($(strip $(WITH_JIT)),) 244 WITH_JIT := true 245endif 246 247define transform-o-to-shared-lib-inner 248$(hide) $(PRIVATE_CXX) \ 249 -nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \ 250 -Wl,--gc-sections \ 251 -Wl,-shared,-Bsymbolic \ 252 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 253 $(PRIVATE_ALL_OBJECTS) \ 254 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 255 -Wl,--whole-archive \ 256 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 257 -Wl,--no-whole-archive \ 258 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 259 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 260 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 261 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 262 -o $@ \ 263 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 264 $(PRIVATE_LDFLAGS) \ 265 $(PRIVATE_TARGET_FDO_LIB) \ 266 $(PRIVATE_TARGET_LIBGCC) \ 267 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 268endef 269 270define transform-o-to-executable-inner 271$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 272 -Wl,-dynamic-linker,/system/bin/linker \ 273 -Wl,--gc-sections \ 274 -Wl,-z,nocopyreloc \ 275 -o $@ \ 276 $(TARGET_GLOBAL_LD_DIRS) \ 277 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 278 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 279 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \ 280 $(PRIVATE_ALL_OBJECTS) \ 281 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 282 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 283 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 284 $(TARGET_GLOBAL_LDFLAGS) \ 285 $(PRIVATE_LDFLAGS) \ 286 $(TARGET_FDO_LIB) \ 287 $(TARGET_LIBGCC) \ 288 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O)) 289endef 290 291define transform-o-to-static-executable-inner 292$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 293 -Wl,--gc-sections \ 294 -o $@ \ 295 $(TARGET_GLOBAL_LD_DIRS) \ 296 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \ 297 $(TARGET_GLOBAL_LDFLAGS) \ 298 $(PRIVATE_LDFLAGS) \ 299 $(PRIVATE_ALL_OBJECTS) \ 300 $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \ 301 -Wl,--start-group \ 302 $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 303 $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 304 $(TARGET_FDO_LIB) \ 305 $(TARGET_LIBGCC) \ 306 -Wl,--end-group \ 307 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O)) 308endef 309