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 -Werror=implicit-function-declaration \ 95 96 TARGET_GLOBAL_CFLAGS += -fno-strict-volatile-bitfields 97 98 # This is to avoid the dreaded warning compiler message: 99 # note: the mangling of 'va_list' has changed in GCC 4.4 100 # 101 # The fact that the mangling changed does not affect the NDK ABI 102 # very fortunately (since none of the exposed APIs used va_list 103 # in their exported C++ functions). Also, GCC 4.5 has already 104 # removed the warning from the compiler. 105 # 106 TARGET_GLOBAL_CFLAGS += -Wno-psabi 107 108 TARGET_GLOBAL_LDFLAGS += \ 109 -Wl,-z,noexecstack \ 110 -Wl,-z,relro \ 111 -Wl,-z,now \ 112 -Wl,--build-id=md5 \ 113 -Wl,--warn-shared-textrel \ 114 -Wl,--fatal-warnings \ 115 -Wl,-maarch64linux \ 116 -Wl,--hash-style=gnu \ 117 -Wl,--fix-cortex-a53-843419 \ 118 $(arch_variant_ldflags) 119 120 # Disable transitive dependency library symbol resolving. 121 TARGET_GLOBAL_LDFLAGS += -Wl,--allow-shlib-undefined 122 123 TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 124 125 # More flags/options can be added here 126 TARGET_RELEASE_CFLAGS := \ 127 -DNDEBUG \ 128 -O2 -g \ 129 -Wstrict-aliasing=2 \ 130 -fgcse-after-reload \ 131 -frerun-cse-after-loop \ 132 -frename-registers 133 134 libc_root := bionic/libc 135 libm_root := bionic/libm 136 137 TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 138 -print-libgcc-file-name) 139 TARGET_LIBATOMIC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 140 -print-file-name=libatomic.a) 141 TARGET_LIBGCOV := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 142 -print-file-name=libgcov.a) 143 144 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 145 KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH) 146 KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 147 148 TARGET_C_INCLUDES := \ 149 $(libc_root)/arch-arm64/include \ 150 $(libc_root)/include \ 151 $(KERNEL_HEADERS) \ 152 $(libm_root)/include \ 153 $(libm_root)/include/arm64 \ 154 155 TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 156 TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 157 TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 158 159 TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 160 TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 161 162 TARGET_PACK_MODULE_RELOCATIONS := true 163 164 TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm 165 166 TARGET_LINKER := /system/bin/linker64 167
