TARGET_linux-arm.mk revision 5d84f1659fbd48253d25785814e5c457575ea2da
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-linux-androideabi-4.4.x/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 $(arch_include_dir) 116 117# This warning causes dalvik not to build with gcc 4.6 and -Werror. 118# We cannot turn it off blindly since the option is not available 119# in gcc-4.4.x 120ifneq ($(filter 4.6.0%, $(shell $(TARGET_CC) --version)),) 121TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable 122endif 123 124# This is to avoid the dreaded warning compiler message: 125# note: the mangling of 'va_list' has changed in GCC 4.4 126# 127# The fact that the mangling changed does not affect the NDK ABI 128# very fortunately (since none of the exposed APIs used va_list 129# in their exported C++ functions). Also, GCC 4.5 has already 130# removed the warning from the compiler. 131# 132TARGET_GLOBAL_CFLAGS += -Wno-psabi 133 134TARGET_GLOBAL_LDFLAGS += \ 135 -Wl,-z,noexecstack \ 136 -Wl,--icf=safe \ 137 $(arch_variant_ldflags) 138 139# We only need thumb interworking in cases where thumb support 140# is available in the architecture, and just to be sure, (and 141# since sometimes thumb-interwork appears to be default), we 142# specifically disable when thumb support is unavailable. 143ifeq ($(ARCH_ARM_HAVE_THUMB_SUPPORT),true) 144TARGET_GLOBAL_CFLAGS += -mthumb-interwork 145else 146TARGET_GLOBAL_CFLAGS += -mno-thumb-interwork 147endif 148 149TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 150 151# More flags/options can be added here 152TARGET_RELEASE_CFLAGS := \ 153 -DNDEBUG \ 154 -g \ 155 -Wstrict-aliasing=2 \ 156 -fgcse-after-reload \ 157 -frerun-cse-after-loop \ 158 -frename-registers 159 160libc_root := bionic/libc 161libm_root := bionic/libm 162libstdc++_root := bionic/libstdc++ 163libthread_db_root := bionic/libthread_db 164 165 166## on some hosts, the target cross-compiler is not available so do not run this command 167ifneq ($(wildcard $(TARGET_CC)),) 168# We compile with the global cflags to ensure that 169# any flags which affect libgcc are correctly taken 170# into account. 171TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 172endif 173 174# Define FDO (Feedback Directed Optimization) options. 175 176TARGET_FDO_CFLAGS:= 177TARGET_FDO_LIB:= 178 179target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 180 -print-file-name=libgcov.a) 181ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),) 182 # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation. 183 # The profile will be generated on /data/local/tmp/profile on the device. 184 TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO 185 TARGET_FDO_LIB := $(target_libgcov) 186else 187 # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations. 188 # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build. 189 ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),) 190 TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT) 191 else 192 ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 193 $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.) 194 endif 195 endif 196 197 # If the FDO profile directory can't be found, then FDO is off. 198 ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),) 199 TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO 200 TARGET_FDO_LIB := $(target_libgcov) 201 endif 202endif 203 204 205# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 206# symlinks located in out/ to point to the appropriate kernel 207# headers. see 'config/kernel_headers.make' for more details 208# 209ifneq ($(CUSTOM_KERNEL_HEADERS),) 210 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 211 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 212else 213 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 214 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 215endif 216KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 217 218TARGET_C_INCLUDES := \ 219 $(libc_root)/arch-arm/include \ 220 $(libc_root)/include \ 221 $(libstdc++_root)/include \ 222 $(KERNEL_HEADERS) \ 223 $(libm_root)/include \ 224 $(libm_root)/include/arm \ 225 $(libthread_db_root)/include 226 227TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o 228TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o 229TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o 230 231TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_so.o 232TARGET_CRTEND_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_so.o 233 234TARGET_STRIP_MODULE:=true 235 236TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 237 238TARGET_CUSTOM_LD_COMMAND := true 239 240# Enable the Dalvik JIT compiler if not already specified. 241ifeq ($(strip $(WITH_JIT)),) 242 WITH_JIT := true 243endif 244 245define transform-o-to-shared-lib-inner 246$(hide) $(PRIVATE_CXX) \ 247 -nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \ 248 -Wl,--gc-sections \ 249 -Wl,-shared,-Bsymbolic \ 250 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 251 $(PRIVATE_ALL_OBJECTS) \ 252 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 253 -Wl,--whole-archive \ 254 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 255 -Wl,--no-whole-archive \ 256 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 257 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 258 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 259 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 260 -o $@ \ 261 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 262 $(PRIVATE_LDFLAGS) \ 263 $(PRIVATE_TARGET_FDO_LIB) \ 264 $(PRIVATE_TARGET_LIBGCC) \ 265 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 266endef 267 268define transform-o-to-executable-inner 269$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 270 -Wl,-dynamic-linker,/system/bin/linker \ 271 -Wl,--gc-sections \ 272 -Wl,-z,nocopyreloc \ 273 -o $@ \ 274 $(TARGET_GLOBAL_LD_DIRS) \ 275 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 276 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 277 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \ 278 $(PRIVATE_ALL_OBJECTS) \ 279 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 280 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 281 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 282 $(TARGET_GLOBAL_LDFLAGS) \ 283 $(PRIVATE_LDFLAGS) \ 284 $(TARGET_FDO_LIB) \ 285 $(TARGET_LIBGCC) \ 286 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O)) 287endef 288 289define transform-o-to-static-executable-inner 290$(hide) $(PRIVATE_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \ 291 -Wl,--gc-sections \ 292 -o $@ \ 293 $(TARGET_GLOBAL_LD_DIRS) \ 294 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \ 295 $(TARGET_GLOBAL_LDFLAGS) \ 296 $(PRIVATE_LDFLAGS) \ 297 $(PRIVATE_ALL_OBJECTS) \ 298 $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \ 299 -Wl,--start-group \ 300 $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 301 $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 302 $(TARGET_FDO_LIB) \ 303 $(TARGET_LIBGCC) \ 304 -Wl,--end-group \ 305 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O)) 306endef 307