TARGET_linux-arm.mk revision ada132a80ba7edde00ac71727a205d55578e3f47
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 $(TARGET_TOOLS_PREFIX)),) 46TARGET_TOOLS_PREFIX := \ 47 prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-eabi-4.4.3/bin/arm-eabi- 48endif 49 50TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 51TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 52TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 53TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 54TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 55 56TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 57 58TARGET_arm_CFLAGS := -O2 \ 59 -fomit-frame-pointer \ 60 -fstrict-aliasing \ 61 -funswitch-loops \ 62 -finline-limit=300 63 64# Modules can choose to compile some source as thumb. As 65# non-thumb enabled targets are supported, this is treated 66# as a 'hint'. If thumb is not enabled, these files are just 67# compiled as ARM. 68ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 69TARGET_thumb_CFLAGS := -mthumb \ 70 -Os \ 71 -fomit-frame-pointer \ 72 -fno-strict-aliasing \ 73 -finline-limit=64 74else 75TARGET_thumb_CFLAGS := $(TARGET_arm_CFLAGS) 76endif 77 78# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 79# or in your environment to force a full arm build, even for 80# files that are normally built as thumb; this can make 81# gdb debugging easier. Don't forget to do a clean build. 82# 83# NOTE: if you try to build a -O0 build with thumb, several 84# of the libraries (libpv, libwebcore, libkjs) need to be built 85# with -mlong-calls. When built at -O0, those libraries are 86# too big for a thumb "BL <label>" to go from one end to the other. 87ifeq ($(FORCE_ARM_DEBUGGING),true) 88 TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 89 TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 90endif 91 92android_config_h := $(call select-android-config-h,linux-arm) 93arch_include_dir := $(dir $(android_config_h)) 94 95TARGET_GLOBAL_CFLAGS += \ 96 -msoft-float -fpic \ 97 -ffunction-sections \ 98 -funwind-tables \ 99 -fstack-protector \ 100 -Wa,--noexecstack \ 101 -Werror=format-security \ 102 -fno-short-enums \ 103 $(arch_variant_cflags) \ 104 -include $(android_config_h) \ 105 -I $(arch_include_dir) 106 107# This is to avoid the dreaded warning compiler message: 108# note: the mangling of 'va_list' has changed in GCC 4.4 109# 110# The fact that the mangling changed does not affect the NDK ABI 111# very fortunately (since none of the exposed APIs used va_list 112# in their exported C++ functions). Also, GCC 4.5 has already 113# removed the warning from the compiler. 114# 115TARGET_GLOBAL_CFLAGS += -Wno-psabi 116 117TARGET_GLOBAL_LDFLAGS += \ 118 -Wl,-z,noexecstack \ 119 $(arch_variant_ldflags) 120 121# We only need thumb interworking in cases where thumb support 122# is available in the architecture, and just to be sure, (and 123# since sometimes thumb-interwork appears to be default), we 124# specifically disable when thumb support is unavailable. 125ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 126TARGET_GLOBAL_CFLAGS += -mthumb-interwork 127else 128TARGET_GLOBAL_CFLAGS += -mno-thumb-interwork 129endif 130 131TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 132 133TARGET_RELEASE_CFLAGS := \ 134 -DNDEBUG \ 135 -g \ 136 -Wstrict-aliasing=2 \ 137 -finline-functions \ 138 -fno-inline-functions-called-once \ 139 -fgcse-after-reload \ 140 -frerun-cse-after-loop \ 141 -frename-registers 142 143libc_root := bionic/libc 144libm_root := bionic/libm 145libstdc++_root := bionic/libstdc++ 146libthread_db_root := bionic/libthread_db 147 148 149## on some hosts, the target cross-compiler is not available so do not run this command 150ifneq ($(wildcard $(TARGET_CC)),) 151# We compile with the global cflags to ensure that 152# any flags which affect libgcc are correctly taken 153# into account. 154TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 155endif 156 157# Define FDO (Feedback Directed Optimization) options. 158 159TARGET_FDO_CFLAGS:= 160TARGET_FDO_LIB:= 161 162target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 163 --print-file-name=libgcov.a) 164ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 165 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 166 # The profile will be generated on /data/local/tmp/profile on the device. 167 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 168 TARGET_FDO_LIB := $(target_libgcov) 169else 170 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 171 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 172 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 173 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 174 else 175 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 176 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 177 endif 178 endif 179 180 # If the FDO profile directory can't be found, then FDO is off. 181 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 182 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 183 TARGET_FDO_LIB := $(target_libgcov) 184 endif 185endif 186 187 188# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 189# symlinks located in out/ to point to the appropriate kernel 190# headers. see 'config/kernel_headers.make' for more details 191# 192ifneq ($(CUSTOM_KERNEL_HEADERS),) 193 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 194 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 195else 196 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 197 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 198endif 199KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 200 201TARGET_C_INCLUDES := \ 202 $(libc_root)/arch-arm/include \ 203 $(libc_root)/include \ 204 $(libstdc++_root)/include \ 205 $(KERNEL_HEADERS) \ 206 $(libm_root)/include \ 207 $(libm_root)/include/arch/arm \ 208 $(libthread_db_root)/include 209 210TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o 211TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o 212TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o 213 214TARGET_STRIP_MODULE:=true 215 216TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 217 218TARGET_CUSTOM_LD_COMMAND := true 219 220# Enable the Dalvik JIT compiler if not already specified. 221ifeq ($(strip $(WITH_JIT)),) 222 WITH_JIT := true 223endif 224 225define transform-o-to-shared-lib-inner 226$(TARGET_CXX) \ 227 -nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \ 228 -Wl,--gc-sections \ 229 -Wl,-shared,-Bsymbolic \ 230 $(TARGET_GLOBAL_LD_DIRS) \ 231 $(PRIVATE_ALL_OBJECTS) \ 232 -Wl,--whole-archive \ 233 $(call normalize-host-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 234 -Wl,--no-whole-archive \ 235 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 236 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 237 -o $@ \ 238 $(TARGET_GLOBAL_LDFLAGS) \ 239 $(PRIVATE_LDFLAGS) \ 240 $(TARGET_FDO_LIB) \ 241 $(TARGET_LIBGCC) 242endef 243 244define transform-o-to-executable-inner 245$(TARGET_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 246 -Wl,-dynamic-linker,/system/bin/linker \ 247 -Wl,--gc-sections \ 248 -Wl,-z,nocopyreloc \ 249 -o $@ \ 250 $(TARGET_GLOBAL_LD_DIRS) \ 251 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 252 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 253 $(TARGET_CRTBEGIN_DYNAMIC_O) \ 254 $(PRIVATE_ALL_OBJECTS) \ 255 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 256 $(TARGET_GLOBAL_LDFLAGS) \ 257 $(PRIVATE_LDFLAGS) \ 258 $(TARGET_FDO_LIB) \ 259 $(TARGET_LIBGCC) \ 260 $(TARGET_CRTEND_O) 261endef 262 263define transform-o-to-static-executable-inner 264$(TARGET_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 265 -Wl,--gc-sections \ 266 -o $@ \ 267 $(TARGET_GLOBAL_LD_DIRS) \ 268 $(TARGET_CRTBEGIN_STATIC_O) \ 269 $(TARGET_GLOBAL_LDFLAGS) \ 270 $(PRIVATE_LDFLAGS) \ 271 $(PRIVATE_ALL_OBJECTS) \ 272 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 273 $(TARGET_FDO_LIB) \ 274 $(TARGET_LIBGCC) \ 275 $(TARGET_CRTEND_O) 276endef 277