TARGET_linux-arm.mk revision 2915cc3e323a9bf86e1a20b201ceb4e9529bc5a2
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-4.4.0/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 -fno-short-enums \ 102 $(arch_variant_cflags) \ 103 -include $(android_config_h) \ 104 -I $(arch_include_dir) 105 106TARGET_GLOBAL_LDFLAGS += \ 107 -Wl,-z,noexecstack \ 108 $(arch_variant_ldflags) 109 110# We only need thumb interworking in cases where thumb support 111# is available in the architecture, and just to be sure, (and 112# since sometimes thumb-interwork appears to be default), we 113# specifically disable when thumb support is unavailable. 114ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 115TARGET_GLOBAL_CFLAGS += -mthumb-interwork 116else 117TARGET_GLOBAL_CFLAGS += -mno-thumb-interwork 118endif 119 120TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 121 122TARGET_RELEASE_CFLAGS := \ 123 -DNDEBUG \ 124 -g \ 125 -Wstrict-aliasing=2 \ 126 -finline-functions \ 127 -fno-inline-functions-called-once \ 128 -fgcse-after-reload \ 129 -frerun-cse-after-loop \ 130 -frename-registers 131 132libc_root := bionic/libc 133libm_root := bionic/libm 134libstdc++_root := bionic/libstdc++ 135libthread_db_root := bionic/libthread_db 136 137 138## on some hosts, the target cross-compiler is not available so do not run this command 139ifneq ($(wildcard $(TARGET_CC)),) 140# We compile with the global cflags to ensure that 141# any flags which affect libgcc are correctly taken 142# into account. 143TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 144endif 145 146# Define FDO (Feedback Directed Optimization) options. 147 148TARGET_FDO_CFLAGS:= 149TARGET_FDO_LIB:= 150 151target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 152 --print-file-name=libgcov.a) 153ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 154 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 155 # The profile will be generated on /data/local/tmp/profile on the device. 156 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 157 TARGET_FDO_LIB := $(target_libgcov) 158else 159 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 160 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 161 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 162 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 163 else 164 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 165 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 166 endif 167 endif 168 169 # If the FDO profile directory can't be found, then FDO is off. 170 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 171 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 172 TARGET_FDO_LIB := $(target_libgcov) 173 endif 174endif 175 176 177# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 178# symlinks located in out/ to point to the appropriate kernel 179# headers. see 'config/kernel_headers.make' for more details 180# 181ifneq ($(CUSTOM_KERNEL_HEADERS),) 182 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 183 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 184else 185 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 186 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 187endif 188KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 189 190TARGET_C_INCLUDES := \ 191 $(libc_root)/arch-arm/include \ 192 $(libc_root)/include \ 193 $(libstdc++_root)/include \ 194 $(KERNEL_HEADERS) \ 195 $(libm_root)/include \ 196 $(libm_root)/include/arch/arm \ 197 $(libthread_db_root)/include 198 199TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o 200TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o 201TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o 202 203TARGET_STRIP_MODULE:=true 204 205TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 206 207TARGET_CUSTOM_LD_COMMAND := true 208 209# Enable the Dalvik JIT compiler if not already specified. 210ifeq ($(strip $(WITH_JIT)),) 211 WITH_JIT := true 212endif 213 214define transform-o-to-shared-lib-inner 215$(TARGET_CXX) \ 216 -nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \ 217 -Wl,--gc-sections \ 218 -Wl,-shared,-Bsymbolic \ 219 $(TARGET_GLOBAL_LD_DIRS) \ 220 $(PRIVATE_ALL_OBJECTS) \ 221 -Wl,--whole-archive \ 222 $(call normalize-host-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 223 -Wl,--no-whole-archive \ 224 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 225 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 226 -o $@ \ 227 $(TARGET_GLOBAL_LDFLAGS) \ 228 $(PRIVATE_LDFLAGS) \ 229 $(TARGET_FDO_LIB) \ 230 $(TARGET_LIBGCC) 231endef 232 233define transform-o-to-executable-inner 234$(TARGET_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 235 -Wl,-dynamic-linker,/system/bin/linker \ 236 -Wl,--gc-sections \ 237 -Wl,-z,nocopyreloc \ 238 -o $@ \ 239 $(TARGET_GLOBAL_LD_DIRS) \ 240 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 241 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 242 $(TARGET_CRTBEGIN_DYNAMIC_O) \ 243 $(PRIVATE_ALL_OBJECTS) \ 244 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 245 $(TARGET_GLOBAL_LDFLAGS) \ 246 $(PRIVATE_LDFLAGS) \ 247 $(TARGET_FDO_LIB) \ 248 $(TARGET_LIBGCC) \ 249 $(TARGET_CRTEND_O) 250endef 251 252define transform-o-to-static-executable-inner 253$(TARGET_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 254 -Wl,--gc-sections \ 255 -o $@ \ 256 $(TARGET_GLOBAL_LD_DIRS) \ 257 $(TARGET_CRTBEGIN_STATIC_O) \ 258 $(TARGET_GLOBAL_LDFLAGS) \ 259 $(PRIVATE_LDFLAGS) \ 260 $(PRIVATE_ALL_OBJECTS) \ 261 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 262 $(TARGET_FDO_LIB) \ 263 $(TARGET_LIBGCC) \ 264 $(TARGET_CRTEND_O) 265endef 266