TARGET_linux-x86.mk revision 054ffd2e7c3da585ab223518569e7436858ba5e0
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)),) 26TARGET_GCC_VERSION := 4.6 27endif 28 29# Include the arch-variant-specific configuration file. 30# Its role is to define various ARCH_X86_HAVE_XXX feature macros, 31# plus initial values for TARGET_GLOBAL_CFLAGS 32# 33TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 34ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 35$(error Unknown $(TARGET_ARCH) architecture version: $(TARGET_ARCH_VARIANT)) 36endif 37 38include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 39 40 41# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 42ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 43TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-$(TARGET_GCC_VERSION) 44TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/i686-linux-android- 45endif 46 47TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 48TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 49TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 50TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 51TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 52TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 53 54ifeq ($(TARGET_BUILD_VARIANT),user) 55TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ 56else 57TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ && \ 58 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 59endif 60 61ifneq ($(wildcard $(TARGET_CC)),) 62TARGET_LIBGCC := \ 63 $(shell $(TARGET_CC) -m32 -print-file-name=libgcc.a) 64endif 65 66TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 67 68libc_root := bionic/libc 69libm_root := bionic/libm 70libstdc++_root := bionic/libstdc++ 71libthread_db_root := bionic/libthread_db 72 73# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 74# symlinks located in out/ to point to the appropriate kernel 75# headers. see 'config/kernel_headers.make' for more details 76# 77ifneq ($(CUSTOM_KERNEL_HEADERS),) 78 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 79 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 80else 81 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 82 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 83endif 84KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 85 86TARGET_GLOBAL_CFLAGS += \ 87 -O2 \ 88 -Ulinux \ 89 -Wa,--noexecstack \ 90 -Werror=format-security \ 91 -D_FORTIFY_SOURCE=1 \ 92 -Wstrict-aliasing=2 \ 93 -fPIC -fPIE \ 94 -ffunction-sections \ 95 -finline-functions \ 96 -finline-limit=300 \ 97 -fno-inline-functions-called-once \ 98 -fno-short-enums \ 99 -fstrict-aliasing \ 100 -funswitch-loops \ 101 -funwind-tables \ 102 -fstack-protector 103 104android_config_h := $(call select-android-config-h,target_linux-x86) 105TARGET_ANDROID_CONFIG_CFLAGS := -include $(android_config_h) -I $(dir $(android_config_h)) 106TARGET_GLOBAL_CFLAGS += $(TARGET_ANDROID_CONFIG_CFLAGS) 107 108# XXX: Not sure this is still needed. Must check with our toolchains. 109TARGET_GLOBAL_CPPFLAGS += \ 110 -fno-use-cxa-atexit 111 112# XXX: Our toolchain is normally configured to always set these flags by default 113# however, there have been reports that this is sometimes not the case. So make 114# them explicit here unless we have the time to carefully check it 115# 116TARGET_GLOBAL_CFLAGS += -mstackrealign -msse3 -mfpmath=sse -m32 117 118# XXX: These flags should not be defined here anymore. Instead, the Android.mk 119# of the modules that depend on these features should instead check the 120# corresponding macros (e.g. ARCH_X86_HAVE_SSE2 and ARCH_X86_HAVE_SSSE3) 121# Keep them here until this is all cleared up. 122# 123ifeq ($(ARCH_X86_HAVE_SSE2),true) 124TARGET_GLOBAL_CFLAGS += -DUSE_SSE2 125endif 126 127ifeq ($(ARCH_X86_HAVE_SSSE3),true) # yes, really SSSE3, not SSE3! 128TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 129endif 130 131# XXX: This flag is probably redundant. I believe our toolchain always sets 132# it by default. Consider for removal. 133# 134TARGET_GLOBAL_CFLAGS += -mbionic 135 136# XXX: This flag is probably redundant. The macro should be defined by our 137# toolchain binaries automatically (as a compiler built-in). 138# Check with: $BINPREFIX-gcc -dM -E < /dev/null 139# 140# Consider for removal. 141# 142TARGET_GLOBAL_CFLAGS += -D__ANDROID__ 143 144# XXX: This flag is probably redundant since our toolchain binaries already 145# generate 32-bit machine code. It probably dates back to the old days 146# where we were using the host toolchain on Linux to build the platform 147# images. Consider it for removal. 148TARGET_GLOBAL_LDFLAGS += -m32 149 150TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack 151TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now 152TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel 153TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections 154 155TARGET_C_INCLUDES := \ 156 $(libc_root)/arch-x86/include \ 157 $(libc_root)/include \ 158 $(libstdc++_root)/include \ 159 $(KERNEL_HEADERS) \ 160 $(libm_root)/include \ 161 $(libm_root)/include/i387 \ 162 $(libthread_db_root)/include 163 164TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 165TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 166TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 167 168TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 169TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 170 171TARGET_STRIP_MODULE:=true 172 173TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 174 175TARGET_CUSTOM_LD_COMMAND := true 176define transform-o-to-shared-lib-inner 177$(hide) $(PRIVATE_CXX) \ 178 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 179 -nostdlib -Wl,-soname,$(notdir $@) \ 180 -shared -Bsymbolic \ 181 $(TARGET_GLOBAL_CFLAGS) \ 182 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 183 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 184 $(PRIVATE_ALL_OBJECTS) \ 185 -Wl,--whole-archive \ 186 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 187 -Wl,--no-whole-archive \ 188 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 189 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 190 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 191 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 192 -o $@ \ 193 $(PRIVATE_LDFLAGS) \ 194 $(PRIVATE_TARGET_LIBGCC) \ 195 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 196endef 197 198define transform-o-to-executable-inner 199$(hide) $(PRIVATE_CXX) \ 200 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 201 -nostdlib -Bdynamic \ 202 -Wl,-dynamic-linker,/system/bin/linker \ 203 -Wl,-z,nocopyreloc \ 204 -fPIE -pie \ 205 -o $@ \ 206 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 207 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 208 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 209 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \ 210 $(PRIVATE_ALL_OBJECTS) \ 211 -Wl,--whole-archive \ 212 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 213 -Wl,--no-whole-archive \ 214 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 215 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 216 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 217 $(PRIVATE_LDFLAGS) \ 218 $(PRIVATE_TARGET_LIBGCC) \ 219 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 220endef 221 222define transform-o-to-static-executable-inner 223$(hide) $(PRIVATE_CXX) \ 224 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 225 -nostdlib -Bstatic \ 226 -o $@ \ 227 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 228 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \ 229 $(PRIVATE_LDFLAGS) \ 230 $(PRIVATE_ALL_OBJECTS) \ 231 -Wl,--whole-archive \ 232 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 233 -Wl,--no-whole-archive \ 234 -Wl,--start-group \ 235 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 236 $(PRIVATE_TARGET_LIBGCC) \ 237 -Wl,--end-group \ 238 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 239endef 240 241# Special check for x86 NDK ABI compatibility. 242# The TARGET_CPU_ABI variable should be defined in BoardConfig.mk to 'x86' 243# *only* if the platform image is compatible with the NDK x86 ABI. 244# 245# We perform a small check here to ensure that nothing bad can happen. 246# 247ifeq ($(TARGET_CPU_ABI),x86) 248 ifneq (true-true-true-true,$(ARCH_X86_HAVE_MMX)-$(ARCH_X86_HAVE_SSE)-$(ARCH_X86_HAVE_SSE2)-$(ARCH_X86_HAVE_SSE3)) 249 $(info ERROR: Your x86 platform image is not compatible with the NDK x86 ABI) 250 $(info As such, you should *not* define TARGET_CPU_ABI to 'x86' in your BoardConfig.mk) 251 $(info to ensure that your device will not be mistakenly listed as compatible by 252 $(info the Android Market. Also, it is likely that the image will fail the CTS tests) 253 $(info Please undefine TARGET_CPU_ABI in your BoardConfig.mk, or select the value 'none') 254 $(info The corresponding image will still be able to run Dalvik-based Android applications) 255 $(error Aborting build! Please fix your BoardConfig.mk) 256 endif 257endif 258