TARGET_linux-arm64.mk revision 216ecac61ec19478e85d6588c2514c14517739f9
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# $(BUILD_COMBOS)/arch/<name>.mk which must contain 23# makefile variable definitions similar to the preprocessor 24# defines in build/core/combo/include/arch/<combo>/AndroidConfig.h. Their 25# purpose is to allow module Android.mk files to selectively compile 26# different versions of code based upon the funtionality and 27# instructions available in a given architecture version. 28# 29# The blocks also define specific arch_variant_cflags, which 30# include defines, and compiler settings for the given architecture 31# version. 32# 33ifeq ($(strip $(TARGET_ARCH_VARIANT)),) 34TARGET_ARCH_VARIANT := armv8 35endif 36 37# Decouple NDK library selection with platform compiler version 38TARGET_NDK_GCC_VERSION := 4.9 39 40ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 41TARGET_GCC_VERSION := 4.9 42else 43TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 44endif 45 46TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk 47ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 48$(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT)) 49endif 50 51include $(TARGET_ARCH_SPECIFIC_MAKEFILE) 52include $(BUILD_SYSTEM)/combo/fdo.mk 53 54# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else 55ifeq ($(strip $(TARGET_TOOLS_PREFIX)),) 56TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/aarch64/aarch64-linux-android-$(TARGET_GCC_VERSION) 57TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/aarch64-linux-android- 58endif 59 60TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc 61TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++ 62TARGET_AR := $(TARGET_TOOLS_PREFIX)ar 63TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy 64TARGET_LD := $(TARGET_TOOLS_PREFIX)ld 65TARGET_READELF := $(TARGET_TOOLS_PREFIX)readelf 66TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip 67 68TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 69 70TARGET_GLOBAL_CFLAGS += \ 71 -fno-strict-aliasing \ 72 73android_config_h := $(call select-android-config-h,linux-arm64) 74 75TARGET_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. 91TARGET_GLOBAL_CFLAGS += \ 92 -Werror=pointer-to-int-cast \ 93 -Werror=int-to-pointer-cast \ 94 -Werror=implicit-function-declaration \ 95 96TARGET_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# 106TARGET_GLOBAL_CFLAGS += -Wno-psabi 107 108TARGET_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 $(arch_variant_ldflags) 118 119# Disable transitive dependency library symbol resolving. 120TARGET_GLOBAL_LDFLAGS += -Wl,--allow-shlib-undefined 121 122TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 123 124# More flags/options can be added here 125TARGET_RELEASE_CFLAGS := \ 126 -DNDEBUG \ 127 -O2 -g \ 128 -Wstrict-aliasing=2 \ 129 -fgcse-after-reload \ 130 -frerun-cse-after-loop \ 131 -frename-registers 132 133libc_root := bionic/libc 134libm_root := bionic/libm 135 136TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 137 -print-libgcc-file-name) 138TARGET_LIBATOMIC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 139 -print-file-name=libatomic.a) 140TARGET_LIBGCOV := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 141 -print-file-name=libgcov.a) 142 143KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 144KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH) 145KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 146 147TARGET_C_INCLUDES := \ 148 $(libc_root)/arch-arm64/include \ 149 $(libc_root)/include \ 150 $(KERNEL_HEADERS) \ 151 $(libm_root)/include \ 152 $(libm_root)/include/arm64 \ 153 154TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 155TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 156TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 157 158TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 159TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 160 161TARGET_PACK_MODULE_RELOCATIONS := true 162 163TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm 164 165TARGET_LINKER := /system/bin/linker64 166