TARGET_linux-x86.mk revision f4723fa49b6e61f727b6321a4006ee8ba3f393b9
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 x86 as a target. 18# Included by combo/select.mk 19 20# Provide a default variant. 21ifeq ($(strip $(TARGET_ARCH_VARIANT)),) 22TARGET_ARCH_VARIANT := x86 23endif 24 25ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 26TARGET_GCC_VERSION := 4.7 27else 28TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 29endif 30 31# Include the arch-variant-specific configuration file. 32# Its role is to define various ARCH_X86_HAVE_XXX feature macros, 33# plus initial values for TARGET_GLOBAL_CFLAGS 34# 35TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 36ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 37$(error Unknown $(TARGET_ARCH) architecture version: $(TARGET_ARCH_VARIANT)) 38endif 39 40include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 41 42 43# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 44ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 45TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-$(TARGET_GCC_VERSION) 46TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/i686-linux-android- 47endif 48 49TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 50TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 51TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 52TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 53TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 54TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 55 56ifeq ($(TARGET_BUILD_VARIANT),user) 57TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ 58else 59TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ && \ 60 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 61endif 62 63ifneq ($(wildcard $(TARGET_CC)),) 64TARGET_LIBGCC := \ 65 $(shell $(TARGET_CC) -m32 -print-file-name=libgcc.a) 66endif 67 68TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 69 70libc_root := bionic/libc 71libm_root := bionic/libm 72libstdc++_root := bionic/libstdc++ 73libthread_db_root := bionic/libthread_db 74 75# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 76# symlinks located in out/ to point to the appropriate kernel 77# headers. see 'config/kernel_headers.make' for more details 78# 79ifneq ($(CUSTOM_KERNEL_HEADERS),) 80 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 81 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 82else 83 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 84 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 85endif 86KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 87 88android_config_h := $(call select-android-config-h,target_linux-x86) 89 90TARGET_GLOBAL_CFLAGS += \ 91 -O2 \ 92 -Ulinux \ 93 -Wa,--noexecstack \ 94 -Werror=format-security \ 95 -D_FORTIFY_SOURCE=1 \ 96 -Wstrict-aliasing=2 \ 97 -fPIC -fPIE \ 98 -ffunction-sections \ 99 -finline-functions \ 100 -finline-limit=300 \ 101 -fno-inline-functions-called-once \ 102 -fno-short-enums \ 103 -fstrict-aliasing \ 104 -funswitch-loops \ 105 -funwind-tables \ 106 -fstack-protector \ 107 -include $(android_config_h) \ 108 -I $(dir $(android_config_h)) 109 110# XXX: Not sure this is still needed. Must check with our toolchains. 111TARGET_GLOBAL_CPPFLAGS += \ 112 -fno-use-cxa-atexit 113 114# XXX: Our toolchain is normally configured to always set these flags by default 115# however, there have been reports that this is sometimes not the case. So make 116# them explicit here unless we have the time to carefully check it 117# 118TARGET_GLOBAL_CFLAGS += -mstackrealign -msse3 -mfpmath=sse -m32 119 120# XXX: These flags should not be defined here anymore. Instead, the Android.mk 121# of the modules that depend on these features should instead check the 122# corresponding macros (e.g. ARCH_X86_HAVE_SSE2 and ARCH_X86_HAVE_SSSE3) 123# Keep them here until this is all cleared up. 124# 125ifeq ($(ARCH_X86_HAVE_SSE2),true) 126TARGET_GLOBAL_CFLAGS += -DUSE_SSE2 127endif 128 129ifeq ($(ARCH_X86_HAVE_SSSE3),true) # yes, really SSSE3, not SSE3! 130TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 131endif 132 133# XXX: This flag is probably redundant. I believe our toolchain always sets 134# it by default. Consider for removal. 135# 136TARGET_GLOBAL_CFLAGS += -mbionic 137 138# XXX: This flag is probably redundant. The macro should be defined by our 139# toolchain binaries automatically (as a compiler built-in). 140# Check with: $BINPREFIX-gcc -dM -E < /dev/null 141# 142# Consider for removal. 143# 144TARGET_GLOBAL_CFLAGS += -D__ANDROID__ 145 146# XXX: This flag is probably redundant since our toolchain binaries already 147# generate 32-bit machine code. It probably dates back to the old days 148# where we were using the host toolchain on Linux to build the platform 149# images. Consider it for removal. 150TARGET_GLOBAL_LDFLAGS += -m32 151 152TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack 153TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now 154TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel 155TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections 156 157TARGET_C_INCLUDES := \ 158 $(libc_root)/arch-x86/include \ 159 $(libc_root)/include \ 160 $(libstdc++_root)/include \ 161 $(KERNEL_HEADERS) \ 162 $(libm_root)/include \ 163 $(libm_root)/include/i387 \ 164 $(libthread_db_root)/include 165 166TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 167TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 168TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 169 170TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 171TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 172 173TARGET_STRIP_MODULE:=true 174 175TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 176 177TARGET_CUSTOM_LD_COMMAND := true 178define transform-o-to-shared-lib-inner 179$(hide) $(PRIVATE_CXX) \ 180 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 181 -nostdlib -Wl,-soname,$(notdir $@) \ 182 -shared -Bsymbolic \ 183 $(TARGET_GLOBAL_CFLAGS) \ 184 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 185 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 186 $(PRIVATE_ALL_OBJECTS) \ 187 -Wl,--whole-archive \ 188 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 189 -Wl,--no-whole-archive \ 190 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 191 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 192 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 193 $(PRIVATE_TARGET_LIBGCC) \ 194 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 195 -o $@ \ 196 $(PRIVATE_LDFLAGS) \ 197 $(PRIVATE_TARGET_LIBGCC) \ 198 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 199endef 200 201define transform-o-to-executable-inner 202$(hide) $(PRIVATE_CXX) \ 203 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 204 -nostdlib -Bdynamic \ 205 -Wl,-dynamic-linker,/system/bin/linker \ 206 -Wl,-z,nocopyreloc \ 207 -fPIE -pie \ 208 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 209 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 210 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \ 211 $(PRIVATE_ALL_OBJECTS) \ 212 -Wl,--whole-archive \ 213 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 214 -Wl,--no-whole-archive \ 215 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 216 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 217 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 218 $(PRIVATE_TARGET_LIBGCC) \ 219 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 220 -o $@ \ 221 $(PRIVATE_LDFLAGS) \ 222 $(PRIVATE_TARGET_LIBGCC) \ 223 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 224endef 225 226define transform-o-to-static-executable-inner 227$(hide) $(PRIVATE_CXX) \ 228 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 229 -nostdlib -Bstatic \ 230 -o $@ \ 231 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 232 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \ 233 $(PRIVATE_LDFLAGS) \ 234 $(PRIVATE_ALL_OBJECTS) \ 235 -Wl,--whole-archive \ 236 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 237 -Wl,--no-whole-archive \ 238 -Wl,--start-group \ 239 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 240 $(PRIVATE_TARGET_LIBGCC) \ 241 -Wl,--end-group \ 242 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 243endef 244 245# Special check for x86 NDK ABI compatibility. 246# The TARGET_CPU_ABI variable should be defined in BoardConfig.mk to 'x86' 247# *only* if the platform image is compatible with the NDK x86 ABI. 248# 249# We perform a small check here to ensure that nothing bad can happen. 250# 251ifeq ($(TARGET_CPU_ABI),x86) 252 ifneq (true-true-true-true,$(ARCH_X86_HAVE_MMX)-$(ARCH_X86_HAVE_SSE)-$(ARCH_X86_HAVE_SSE2)-$(ARCH_X86_HAVE_SSE3)) 253 $(info ERROR: Your x86 platform image is not compatible with the NDK x86 ABI) 254 $(info As such, you should *not* define TARGET_CPU_ABI to 'x86' in your BoardConfig.mk) 255 $(info to ensure that your device will not be mistakenly listed as compatible by 256 $(info the Android Market. Also, it is likely that the image will fail the CTS tests) 257 $(info Please undefine TARGET_CPU_ABI in your BoardConfig.mk, or select the value 'none') 258 $(info The corresponding image will still be able to run Dalvik-based Android applications) 259 $(error Aborting build! Please fix your BoardConfig.mk) 260 endif 261endif 262