1 # 2 # Copyright (C) 2013 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 # $(BUILD_COMBOS)/arch/<name>.mk which must contain 23 # makefile variable definitions similar to the preprocessor 24 # defines in build/core/combo/include/arch/<combo>/AndroidConfig.h. Their 25 # purpose is to allow module Android.mk files to selectively compile 26 # different versions of code based upon the funtionality and 27 # instructions available in a given architecture version. 28 # 29 # The blocks also define specific arch_variant_cflags, which 30 # include defines, and compiler settings for the given architecture 31 # version. 32 # 33 ifeq ($(strip $(TARGET_ARCH_VARIANT)),) 34 TARGET_ARCH_VARIANT := armv8 35 endif 36 37 # Decouple NDK library selection with platform compiler version 38 TARGET_NDK_GCC_VERSION := 4.9 39 40 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 41 TARGET_GCC_VERSION := 4.9 42 else 43 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 44 endif 45 46 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 47 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 48 $(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT)) 49 endif 50 51 include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 52 include $(BUILD_SYSTEM)/combo/fdo.mk 53 54 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 55 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 56 TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/aarch64/aarch64-linux-android-$(TARGET_GCC_VERSION) 57 TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/aarch64-linux-android- 58 endif 59 60 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 61 TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 62 TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 63 TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 64 TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 65 TARGET_READELF := $(TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX) 66 TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 67 68 TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 69 70 TARGET_GLOBAL_CFLAGS += \ 71 -fno-strict-aliasing \ 72 73 android_config_h := $(call select-android-config-h,linux-arm64) 74 75 TARGET_GLOBAL_CFLAGS += \ 76 -fstack-protector \ 77 -ffunction-sections \ 78 -fdata-sections \ 79 -funwind-tables \ 80 -Wa,--noexecstack \ 81 -Werror=format-security \ 82 -D_FORTIFY_SOURCE=2 \ 83 -fno-short-enums \ 84 -no-canonical-prefixes \ 85 -fno-canonical-system-headers \ 86 $(arch_variant_cflags) \ 87 -include $(android_config_h) \ 88 -I $(dir $(android_config_h)) 89 90 # Help catch common 32/64-bit errors. 91 TARGET_GLOBAL_CFLAGS += \ 92 -Werror=pointer-to-int-cast \ 93 -Werror=int-to-pointer-cast \ 94 95 TARGET_GLOBAL_CFLAGS += -fno-strict-volatile-bitfields 96 97 # This is to avoid the dreaded warning compiler message: 98 # note: the mangling of 'va_list' has changed in GCC 4.4 99 # 100 # The fact that the mangling changed does not affect the NDK ABI 101 # very fortunately (since none of the exposed APIs used va_list 102 # in their exported C++ functions). Also, GCC 4.5 has already 103 # removed the warning from the compiler. 104 # 105 TARGET_GLOBAL_CFLAGS += -Wno-psabi 106 107 TARGET_GLOBAL_LDFLAGS += \ 108 -Wl,-z,noexecstack \ 109 -Wl,-z,relro \ 110 -Wl,-z,now \ 111 -Wl,--warn-shared-textrel \ 112 -Wl,--fatal-warnings \ 113 -Wl,-maarch64linux \ 114 $(arch_variant_ldflags) 115 116 TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 117 118 # More flags/options can be added here 119 TARGET_RELEASE_CFLAGS := \ 120 -DNDEBUG \ 121 -O2 -g \ 122 -Wstrict-aliasing=2 \ 123 -fgcse-after-reload \ 124 -frerun-cse-after-loop \ 125 -frename-registers 126 127 libc_root := bionic/libc 128 libm_root := bionic/libm 129 libstdc++_root := bionic/libstdc++ 130 131 TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 132 -print-libgcc-file-name) 133 TARGET_LIBATOMIC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 134 -print-file-name=libatomic.a) 135 136 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 137 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH) 138 KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 139 140 TARGET_C_INCLUDES := \ 141 $(libc_root)/arch-arm64/include \ 142 $(libc_root)/include \ 143 $(libstdc++_root)/include \ 144 $(KERNEL_HEADERS) \ 145 $(libm_root)/include \ 146 $(libm_root)/include/arm64 \ 147 148 TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 149 TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 150 TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 151 152 TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 153 TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 154 155 TARGET_STRIP_MODULE:=true 156 157 TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm 158 159 TARGET_CUSTOM_LD_COMMAND := true 160 161 define transform-o-to-shared-lib-inner 162 $(hide) $(PRIVATE_CXX) \ 163 -nostdlib -Wl,-soname,$(notdir $@) \ 164 -Wl,--gc-sections \ 165 $(if $(filter true,$(PRIVATE_CLANG)),-shared,-Wl,-shared) \ 166 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 167 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \ 168 $(PRIVATE_ALL_OBJECTS) \ 169 -Wl,--whole-archive \ 170 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 171 -Wl,--no-whole-archive \ 172 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 173 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 174 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 175 $(if $(TARGET_BUILD_APPS),$(PRIVATE_TARGET_LIBGCC)) \ 176 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 177 -o $@ \ 178 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 179 $(PRIVATE_LDFLAGS) \ 180 $(PRIVATE_TARGET_LIBATOMIC) \ 181 $(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \ 182 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \ 183 $(PRIVATE_LDLIBS) 184 endef 185 186 define transform-o-to-executable-inner 187 $(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -pie \ 188 -Wl,-dynamic-linker,/system/bin/linker64 \ 189 -Wl,--gc-sections \ 190 -Wl,-z,nocopyreloc \ 191 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 192 -Wl,-rpath-link=$(PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES) \ 193 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \ 194 $(PRIVATE_ALL_OBJECTS) \ 195 -Wl,--whole-archive \ 196 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 197 -Wl,--no-whole-archive \ 198 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \ 199 $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \ 200 $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \ 201 $(if $(TARGET_BUILD_APPS),$(PRIVATE_TARGET_LIBGCC)) \ 202 $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \ 203 -o $@ \ 204 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 205 $(PRIVATE_LDFLAGS) \ 206 $(PRIVATE_TARGET_LIBATOMIC) \ 207 $(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \ 208 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \ 209 $(PRIVATE_LDLIBS) 210 endef 211 212 define transform-o-to-static-executable-inner 213 $(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \ 214 -Wl,--gc-sections \ 215 -o $@ \ 216 $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \ 217 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \ 218 $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \ 219 $(PRIVATE_LDFLAGS) \ 220 $(PRIVATE_ALL_OBJECTS) \ 221 -Wl,--whole-archive \ 222 $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \ 223 -Wl,--no-whole-archive \ 224 $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \ 225 -Wl,--start-group \ 226 $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 227 $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \ 228 $(PRIVATE_TARGET_LIBATOMIC) \ 229 $(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \ 230 -Wl,--end-group \ 231 $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) 232 endef 233
