TARGET_linux-x86.mk revision 06b63baedc769863f87ac0b789ac320b3cb0dc2a
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 25# Include the arch-variant-specific configuration file. 26# Its role is to define various ARCH_X86_HAVE_XXX feature macros, 27# plus initial values for TARGET_GLOBAL_CFLAGS 28# 29TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 30ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 31$(error Unknown $(TARGET_ARCH) architecture version: $(TARGET_ARCH_VARIANT)) 32endif 33 34include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 35 36 37# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 38ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 39TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-$(TARGET_GCC_VERSION) 40TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/i686-linux-android- 41endif 42 43TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 44TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 45TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 46TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 47TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 48TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 49 50ifeq ($(TARGET_BUILD_VARIANT),user) 51TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ 52else 53TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ && \ 54 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 55endif 56 57ifneq ($(wildcard $(TARGET_CC)),) 58TARGET_LIBGCC := \ 59 $(shell $(TARGET_CC) -m32 -print-file-name=libgcc.a) 60endif 61 62TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 63 64libc_root := bionic/libc 65libm_root := bionic/libm 66libstdc++_root := bionic/libstdc++ 67libthread_db_root := bionic/libthread_db 68 69# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 70# symlinks located in out/ to point to the appropriate kernel 71# headers. see 'config/kernel_headers.make' for more details 72# 73ifneq ($(CUSTOM_KERNEL_HEADERS),) 74 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 75 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 76else 77 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 78 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 79endif 80KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 81 82TARGET_GLOBAL_CFLAGS += \ 83 -O2 \ 84 -Ulinux \ 85 -Wa,--noexecstack \ 86 -Werror=format-security \ 87 -Wstrict-aliasing=2 \ 88 -fPIC -fPIE \ 89 -ffunction-sections \ 90 -finline-functions \ 91 -finline-limit=300 \ 92 -fno-inline-functions-called-once \ 93 -fno-short-enums \ 94 -fstrict-aliasing \ 95 -funswitch-loops \ 96 -funwind-tables \ 97 -fstack-protector \ 98 -include $(call select-android-config-h,target_linux-x86) 99 100# XXX: Not sure this is still needed. Must check with our toolchains. 101TARGET_GLOBAL_CPPFLAGS += \ 102 -fno-use-cxa-atexit 103 104# XXX: Our toolchain is normally configured to always set these flags by default 105# however, there have been reports that this is sometimes not the case. So make 106# them explicit here unless we have the time to carefully check it 107# 108TARGET_GLOBAL_CFLAGS += -mstackrealign -msse3 -mfpmath=sse -m32 109 110# XXX: These flags should not be defined here anymore. Instead, the Android.mk 111# of the modules that depend on these features should instead check the 112# corresponding macros (e.g. ARCH_X86_HAVE_SSE2 and ARCH_X86_HAVE_SSSE3) 113# Keep them here until this is all cleared up. 114# 115ifeq ($(ARCH_X86_HAVE_SSE2),true) 116TARGET_GLOBAL_CFLAGS += -DUSE_SSE2 117endif 118 119ifeq ($(ARCH_X86_HAVE_SSSE3),true) # yes, really SSSE3, not SSE3! 120TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 121endif 122 123# XXX: This flag is probably redundant. I believe our toolchain always sets 124# it by default. Consider for removal. 125# 126TARGET_GLOBAL_CFLAGS += -mbionic 127 128# XXX: This flag is probably redundant. The macro should be defined by our 129# toolchain binaries automatically (as a compiler built-in). 130# Check with: $BINPREFIX-gcc -dM -E < /dev/null 131# 132# Consider for removal. 133# 134TARGET_GLOBAL_CFLAGS += -D__ANDROID__ 135 136# XXX: This flag is probably redundant since our toolchain binaries already 137# generate 32-bit machine code. It probably dates back to the old days 138# where we were using the host toolchain on Linux to build the platform 139# images. Consider it for removal. 140TARGET_GLOBAL_LDFLAGS += -m32 141 142TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack 143TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now 144TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel 145TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections 146 147TARGET_C_INCLUDES := \ 148 $(libc_root)/arch-x86/include \ 149 $(libc_root)/include \ 150 $(libstdc++_root)/include \ 151 $(KERNEL_HEADERS) \ 152 $(libm_root)/include \ 153 $(libm_root)/include/i387 \ 154 $(libthread_db_root)/include 155 156TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o 157TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o 158TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o 159 160TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_so.o 161TARGET_CRTEND_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_so.o 162 163TARGET_STRIP_MODULE:=true 164 165TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 166 167TARGET_CUSTOM_LD_COMMAND := true 168define transform-o-to-shared-lib-inner 169$(hide) $(PRIVATE_CXX) \ 170 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 171 -nostdlib -Wl,-soname,$(notdir $@) \ 172 -shared -Bsymbolic \ 173 $(TARGET_GLOBAL_CFLAGS) \ 174 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 175 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 176 $(PRIVATE_ALL_OBJECTS) \ 177 -Wl,--whole-archive \ 178 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 179 -Wl,--no-whole-archive \ 180 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 181 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 182 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 183 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 184 -o $@ \ 185 $(PRIVATE_LDFLAGS) \ 186 $(PRIVATE_TARGET_LIBGCC) \ 187 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) 188endef 189 190 191define transform-o-to-executable-inner 192$(hide) $(PRIVATE_CXX) \ 193 $(TARGET_GLOBAL_LDFLAGS) \ 194 -nostdlib -Bdynamic \ 195 -Wl,-dynamic-linker,/system/bin/linker \ 196 -Wl,-z,nocopyreloc \ 197 -fPIE -pie \ 198 -o $@ \ 199 $(TARGET_GLOBAL_LD_DIRS) \ 200 -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 201 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 202 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \ 203 $(PRIVATE_ALL_OBJECTS) \ 204 -Wl,--whole-archive \ 205 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 206 -Wl,--no-whole-archive \ 207 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 208 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 209 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 210 $(PRIVATE_LDFLAGS) \ 211 $(TARGET_LIBGCC) \ 212 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O)) 213endef 214 215define transform-o-to-static-executable-inner 216$(hide) $(PRIVATE_CXX) \ 217 $(TARGET_GLOBAL_LDFLAGS) \ 218 -nostdlib -Bstatic \ 219 -o $@ \ 220 $(TARGET_GLOBAL_LD_DIRS) \ 221 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \ 222 $(PRIVATE_LDFLAGS) \ 223 $(PRIVATE_ALL_OBJECTS) \ 224 -Wl,--whole-archive \ 225 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 226 -Wl,--no-whole-archive \ 227 -Wl,--start-group \ 228 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 229 $(TARGET_LIBGCC) \ 230 -Wl,--end-group \ 231 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O)) 232endef 233 234# Special check for x86 NDK ABI compatibility. 235# The TARGET_CPU_ABI variable should be defined in BoardConfig.mk to 'x86' 236# *only* if the platform image is compatible with the NDK x86 ABI. 237# 238# We perform a small check here to ensure that nothing bad can happen. 239# 240ifeq ($(TARGET_CPU_ABI),x86) 241 ifneq (true-true-true-true,$(ARCH_X86_HAVE_MMX)-$(ARCH_X86_HAVE_SSE)-$(ARCH_X86_HAVE_SSE2)-$(ARCH_X86_HAVE_SSE3)) 242 $(info ERROR: Your x86 platform image is not compatible with the NDK x86 ABI) 243 $(info As such, you should *not* define TARGET_CPU_ABI to 'x86' in your BoardConfig.mk) 244 $(info to ensure that your device will not be mistakenly listed as compatible by 245 $(info the Android Market. Also, it is likely that the image will fail the CTS tests) 246 $(info Please undefine TARGET_CPU_ABI in your BoardConfig.mk, or select the value 'none') 247 $(info The corresponding image will still be able to run Dalvik-based Android applications) 248 $(error Aborting build! Please fix your BoardConfig.mk) 249 endif 250endif 251