TARGET_linux-arm64.mk revision a7f68ee9eaa3dcaf4e17bbf6eb4dae68df2cbdda
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# $(BUILD_COMBOS)/arch/<name>.mk which must contain 23# makefile variable definitions. Their 24# purpose is to allow module Android.mk files to selectively compile 25# different versions of code based upon the funtionality and 26# instructions available in a given architecture version. 27# 28# The blocks also define specific arch_variant_cflags, which 29# include defines, and compiler settings for the given architecture 30# version. 31# 32ifeq ($(strip $(TARGET_ARCH_VARIANT)),) 33TARGET_ARCH_VARIANT := armv8 34endif 35 36# Decouple NDK library selection with platform compiler version 37TARGET_NDK_GCC_VERSION := 4.9 38 39ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 40TARGET_GCC_VERSION := 4.9 41else 42TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 43endif 44 45TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 46ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 47$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT)) 48endif 49 50include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 51include $(BUILD_SYSTEM)/combo/fdo.mk 52 53# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 54ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 55TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/aarch64/aarch64-linux-android-$(TARGET_GCC_VERSION) 56TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/aarch64-linux-android- 57endif 58 59TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc 60TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++ 61TARGET_AR := $(TARGET_TOOLS_PREFIX)ar 62TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy 63TARGET_LD := $(TARGET_TOOLS_PREFIX)ld 64TARGET_READELF := $(TARGET_TOOLS_PREFIX)readelf 65TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip 66 67TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 68 69TARGET_GLOBAL_CFLAGS += \ 70 -fno-strict-aliasing \ 71 72TARGET_GLOBAL_CFLAGS += \ 73 -fstack-protector \ 74 -ffunction-sections \ 75 -fdata-sections \ 76 -funwind-tables \ 77 -Wa,--noexecstack \ 78 -Werror=format-security \ 79 -D_FORTIFY_SOURCE=2 \ 80 -fno-short-enums \ 81 -no-canonical-prefixes \ 82 -fno-canonical-system-headers \ 83 $(arch_variant_cflags) \ 84 85# Help catch common 32/64-bit errors. 86TARGET_GLOBAL_CFLAGS += \ 87 -Werror=pointer-to-int-cast \ 88 -Werror=int-to-pointer-cast \ 89 -Werror=implicit-function-declaration \ 90 91TARGET_GLOBAL_CFLAGS += -fno-strict-volatile-bitfields 92 93# This is to avoid the dreaded warning compiler message: 94# note: the mangling of 'va_list' has changed in GCC 4.4 95# 96# The fact that the mangling changed does not affect the NDK ABI 97# very fortunately (since none of the exposed APIs used va_list 98# in their exported C++ functions). Also, GCC 4.5 has already 99# removed the warning from the compiler. 100# 101TARGET_GLOBAL_CFLAGS += -Wno-psabi 102 103TARGET_GLOBAL_LDFLAGS += \ 104 -Wl,-z,noexecstack \ 105 -Wl,-z,relro \ 106 -Wl,-z,now \ 107 -Wl,--build-id=md5 \ 108 -Wl,--warn-shared-textrel \ 109 -Wl,--fatal-warnings \ 110 -Wl,-maarch64linux \ 111 -Wl,--hash-style=gnu \ 112 -Wl,--fix-cortex-a53-843419 \ 113 -fuse-ld=gold \ 114 -Wl,--icf=safe \ 115 $(arch_variant_ldflags) 116 117# Disable transitive dependency library symbol resolving. 118TARGET_GLOBAL_LDFLAGS += -Wl,--allow-shlib-undefined 119 120TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 121 122# More flags/options can be added here 123TARGET_RELEASE_CFLAGS := \ 124 -DNDEBUG \ 125 -O2 -g \ 126 -Wstrict-aliasing=2 \ 127 -fgcse-after-reload \ 128 -frerun-cse-after-loop \ 129 -frename-registers 130 131libc_root := bionic/libc 132libm_root := bionic/libm 133 134TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 135 -print-libgcc-file-name) 136TARGET_LIBATOMIC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 137 -print-file-name=libatomic.a) 138TARGET_LIBGCOV := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 139 -print-file-name=libgcov.a) 140 141KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 142KERNEL_HEADERS_COMMON += $(libc_root)/kernel/common 143KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH) 144KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 145 146TARGET_C_INCLUDES := \ 147 $(libc_root)/arch-arm64/include \ 148 $(libc_root)/include \ 149 $(KERNEL_HEADERS) \ 150 $(libm_root)/include \ 151 $(libm_root)/include/arm64 \ 152 153TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 154TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 155TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 156 157TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 158TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 159 160TARGET_PACK_MODULE_RELOCATIONS := true 161 162TARGET_LINKER := /system/bin/linker64 163