TARGET_linux-arm.mk revision ec4caba79cf805a21a7d705cb35ecd89bb598a7f
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 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 70 endif 71endif 72 73TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 74 75TARGET_arm_CFLAGS := -O2 \ 76 -fomit-frame-pointer \ 77 -fstrict-aliasing \ 78 -funswitch-loops 79 80# Modules can choose to compile some source as thumb. As 81# non-thumb enabled targets are supported, this is treated 82# as a 'hint'. If thumb is not enabled, these files are just 83# compiled as ARM. 84ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 85TARGET_thumb_CFLAGS := -mthumb \ 86 -Os \ 87 -fomit-frame-pointer \ 88 -fno-strict-aliasing 89else 90TARGET_thumb_CFLAGS := $(TARGET_arm_CFLAGS) 91endif 92 93# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 94# or in your environment to force a full arm build, even for 95# files that are normally built as thumb; this can make 96# gdb debugging easier. Don't forget to do a clean build. 97# 98# NOTE: if you try to build a -O0 build with thumb, several 99# of the libraries (libpv, libwebcore, libkjs) need to be built 100# with -mlong-calls. When built at -O0, those libraries are 101# too big for a thumb "BL <label>" to go from one end to the other. 102ifeq ($(FORCE_ARM_DEBUGGING),true) 103 TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 104 TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 105endif 106 107TARGET_GLOBAL_CFLAGS += \ 108 -msoft-float -fpic -fPIE \ 109 -ffunction-sections \ 110 -fdata-sections \ 111 -funwind-tables \ 112 -fstack-protector \ 113 -Wa,--noexecstack \ 114 -Werror=format-security \ 115 -D_FORTIFY_SOURCE=1 \ 116 -fno-short-enums \ 117 $(arch_variant_cflags) 118 119android_config_h := $(call select-android-config-h,linux-arm) 120TARGET_ANDROID_CONFIG_CFLAGS := -include $(android_config_h) -I $(dir $(android_config_h)) 121TARGET_GLOBAL_CFLAGS += $(TARGET_ANDROID_CONFIG_CFLAGS) 122 123# This warning causes dalvik not to build with gcc 4.6+ and -Werror. 124# We cannot turn it off blindly since the option is not available 125# in gcc-4.4.x. We also want to disable sincos optimization globally 126# by turning off the builtin sin function. 127ifneq ($(filter 4.6 4.6.% 4.7 4.7.%, $(shell $(TARGET_CC) --version)),) 128TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable -fno-builtin-sin \ 129 -fno-strict-volatile-bitfields 130endif 131 132# This is to avoid the dreaded warning compiler message: 133# note: the mangling of 'va_list' has changed in GCC 4.4 134# 135# The fact that the mangling changed does not affect the NDK ABI 136# very fortunately (since none of the exposed APIs used va_list 137# in their exported C++ functions). Also, GCC 4.5 has already 138# removed the warning from the compiler. 139# 140TARGET_GLOBAL_CFLAGS += -Wno-psabi 141 142TARGET_GLOBAL_LDFLAGS += \ 143 -Wl,-z,noexecstack \ 144 -Wl,-z,relro \ 145 -Wl,-z,now \ 146 -Wl,--warn-shared-textrel \ 147 -Wl,--icf=safe \ 148 $(arch_variant_ldflags) 149 150# We only need thumb interworking in cases where thumb support 151# is available in the architecture, and just to be sure, (and 152# since sometimes thumb-interwork appears to be default), we 153# specifically disable when thumb support is unavailable. 154ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 155TARGET_GLOBAL_CFLAGS += -mthumb-interwork 156else 157TARGET_GLOBAL_CFLAGS += -mno-thumb-interwork 158endif 159 160TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 161 162# More flags/options can be added here 163TARGET_RELEASE_CFLAGS := \ 164 -DNDEBUG \ 165 -g \ 166 -Wstrict-aliasing=2 \ 167 -fgcse-after-reload \ 168 -frerun-cse-after-loop \ 169 -frename-registers 170 171libc_root := bionic/libc 172libm_root := bionic/libm 173libstdc++_root := bionic/libstdc++ 174libthread_db_root := bionic/libthread_db 175 176 177## on some hosts, the target cross-compiler is not available so do not run this command 178ifneq ($(wildcard $(TARGET_CC)),) 179# We compile with the global cflags to ensure that 180# any flags which affect libgcc are correctly taken 181# into account. 182TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 183endif 184 185# Define FDO (Feedback Directed Optimization) options. 186 187TARGET_FDO_CFLAGS:= 188TARGET_FDO_LIB:= 189 190target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 191 -print-file-name=libgcov.a) 192ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 193 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 194 # The profile will be generated on /data/local/tmp/profile on the device. 195 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 196 TARGET_FDO_LIB := $(target_libgcov) 197else 198 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 199 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 200 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 201 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 202 else 203 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 204 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 205 endif 206 endif 207 208 # If the FDO profile directory can't be found, then FDO is off. 209 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 210 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 211 TARGET_FDO_LIB := $(target_libgcov) 212 endif 213endif 214 215 216# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 217# symlinks located in out/ to point to the appropriate kernel 218# headers. see 'config/kernel_headers.make' for more details 219# 220ifneq ($(CUSTOM_KERNEL_HEADERS),) 221 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 222 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 223else 224 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 225 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 226endif 227KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 228 229TARGET_C_INCLUDES := \ 230 $(libc_root)/arch-arm/include \ 231 $(libc_root)/include \ 232 $(libstdc++_root)/include \ 233 $(KERNEL_HEADERS) \ 234 $(libm_root)/include \ 235 $(libm_root)/include/arm \ 236 $(libthread_db_root)/include 237 238TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 239TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 240TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 241 242TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 243TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 244 245TARGET_STRIP_MODULE:=true 246 247TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 248 249TARGET_CUSTOM_LD_COMMAND := true 250 251define transform-o-to-shared-lib-inner 252$(hide) $(PRIVATE_CXX) \ 253 -nostdlib -Wl,-soname,$(notdir $@) \ 254 -Wl,--gc-sections \ 255 -Wl,-shared,-Bsymbolic \ 256 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 257 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 258 $(PRIVATE_ALL_OBJECTS) \ 259 -Wl,--whole-archive \ 260 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 261 -Wl,--no-whole-archive \ 262 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 263 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 264 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 265 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 266 -o $@ \ 267 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 268 $(PRIVATE_LDFLAGS) \ 269 $(PRIVATE_TARGET_FDO_LIB) \ 270 $(PRIVATE_TARGET_LIBGCC) \ 271 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 272endef 273 274define transform-o-to-executable-inner 275$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \ 276 -Wl,-dynamic-linker,/system/bin/linker \ 277 -Wl,--gc-sections \ 278 -Wl,-z,nocopyreloc \ 279 -o $@ \ 280 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 281 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 282 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 283 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \ 284 $(PRIVATE_ALL_OBJECTS) \ 285 -Wl,--whole-archive \ 286 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 287 -Wl,--no-whole-archive \ 288 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 289 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 290 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 291 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 292 $(PRIVATE_LDFLAGS) \ 293 $(PRIVATE_TARGET_FDO_LIB) \ 294 $(PRIVATE_TARGET_LIBGCC) \ 295 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 296endef 297 298define transform-o-to-static-executable-inner 299$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \ 300 -Wl,--gc-sections \ 301 -o $@ \ 302 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 303 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \ 304 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 305 $(PRIVATE_LDFLAGS) \ 306 $(PRIVATE_ALL_OBJECTS) \ 307 -Wl,--whole-archive \ 308 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 309 -Wl,--no-whole-archive \ 310 $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \ 311 -Wl,--start-group \ 312 $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 313 $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 314 $(PRIVATE_TARGET_FDO_LIB) \ 315 $(PRIVATE_TARGET_LIBGCC) \ 316 -Wl,--end-group \ 317 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 318endef 319