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. 21 ifeq ($(strip $(TARGET_ARCH_VARIANT)),) 22 TARGET_ARCH_VARIANT := x86 23 endif 24 25 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 26 TARGET_GCC_VERSION := 4.7 27 else 28 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 29 endif 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 # 35 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 36 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 37 $(error Unknown $(TARGET_ARCH) architecture version: $(TARGET_ARCH_VARIANT)) 38 endif 39 40 include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 41 42 43 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 44 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 45 TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-$(TARGET_GCC_VERSION) 46 TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/i686-linux-android- 47 endif 48 49 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 50 TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 51 TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 52 TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 53 TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 54 TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 55 56 ifeq ($(TARGET_BUILD_VARIANT),user) 57 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ 58 else 59 TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-debug $< -o $@ && \ 60 $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@ 61 endif 62 63 ifneq ($(wildcard $(TARGET_CC)),) 64 TARGET_LIBGCC := \ 65 $(shell $(TARGET_CC) -m32 -print-file-name=libgcc.a) 66 endif 67 68 TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 69 70 libc_root := bionic/libc 71 libm_root := bionic/libm 72 libstdc++_root := bionic/libstdc++ 73 libthread_db_root := bionic/libthread_db 74 75 # unless CUSTOM_KERNEL_HEADERS is defined, we're going to use 76 # symlinks located in out/ to point to the appropriate kernel 77 # headers. see 'config/kernel_headers.make' for more details 78 # 79 ifneq ($(CUSTOM_KERNEL_HEADERS),) 80 KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS) 81 KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS) 82 else 83 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common 84 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH) 85 endif 86 KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 87 88 android_config_h := $(call select-android-config-h,target_linux-x86) 89 90 TARGET_GLOBAL_CFLAGS += \ 91 -O2 \ 92 -Ulinux \ 93 -Wa,--noexecstack \ 94 -Werror=format-security \ 95 -D_FORTIFY_SOURCE=2 \ 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 $(android_config_h)) 109 110 # XXX: Not sure this is still needed. Must check with our toolchains. 111 TARGET_GLOBAL_CPPFLAGS += \ 112 -fno-use-cxa-atexit 113 114 # XXX: Our toolchain is normally configured to always set these flags by default 115 # however, there have been reports that this is sometimes not the case. So make 116 # them explicit here unless we have the time to carefully check it 117 # 118 TARGET_GLOBAL_CFLAGS += -mstackrealign -msse3 -mfpmath=sse -m32 119 120 # XXX: These flags should not be defined here anymore. Instead, the Android.mk 121 # of the modules that depend on these features should instead check the 122 # corresponding macros (e.g. ARCH_X86_HAVE_SSE2 and ARCH_X86_HAVE_SSSE3) 123 # Keep them here until this is all cleared up. 124 # 125 ifeq ($(ARCH_X86_HAVE_SSE2),true) 126 TARGET_GLOBAL_CFLAGS += -DUSE_SSE2 127 endif 128 129 ifeq ($(ARCH_X86_HAVE_SSSE3),true) # yes, really SSSE3, not SSE3! 130 TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 131 endif 132 133 # XXX: This flag is probably redundant. I believe our toolchain always sets 134 # it by default. Consider for removal. 135 # 136 TARGET_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 # 144 TARGET_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. 150 TARGET_GLOBAL_LDFLAGS += -m32 151 152 TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack 153 TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now 154 TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel 155 TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections 156 157 TARGET_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 165 166 TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 167 TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 168 TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 169 170 TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 171 TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 172 173 TARGET_STRIP_MODULE:=true 174 175 TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 176 177 TARGET_CUSTOM_LD_COMMAND := true 178 define 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)) 199 endef 200 201 define 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)) 224 endef 225 226 define 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)),,$(PRIVATE_TARGET_CRTEND_O)) 243 endef 244 245 # Special check for x86 NDK ABI compatibility. 246 # The TARGET_CPU_ABI variable should be defined in BoardConfig.mk to 'x86' 247 # *only* if the platform image is compatible with the NDK x86 ABI. 248 # 249 # We perform a small check here to ensure that nothing bad can happen. 250 # 251 ifeq ($(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 261 endif 262
