TARGET_linux-arm64.mk revision b8c4a6f1f8fe11a1420278f1291482a5865e541e
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 66TARGET_NM := $(TARGET_TOOLS_PREFIX)nm 67 68define $(combo_var_prefix)transform-shared-lib-to-toc 69$(call _gen_toc_command_for_elf,$(1),$(2)) 70endef 71 72TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 73 74TARGET_GLOBAL_CFLAGS += \ 75 -fno-strict-aliasing \ 76 77TARGET_GLOBAL_CFLAGS += \ 78 -fstack-protector \ 79 -ffunction-sections \ 80 -fdata-sections \ 81 -funwind-tables \ 82 -Wa,--noexecstack \ 83 -Werror=format-security \ 84 -D_FORTIFY_SOURCE=2 \ 85 -fno-short-enums \ 86 -no-canonical-prefixes \ 87 -fno-canonical-system-headers \ 88 $(arch_variant_cflags) \ 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 -Wl,--fix-cortex-a53-843419 \ 118 -fuse-ld=gold \ 119 -Wl,--icf=safe \ 120 $(arch_variant_ldflags) 121 122# Disable transitive dependency library symbol resolving. 123TARGET_GLOBAL_LDFLAGS += -Wl,--allow-shlib-undefined 124 125TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 126 127# More flags/options can be added here 128TARGET_RELEASE_CFLAGS := \ 129 -DNDEBUG \ 130 -O2 -g \ 131 -Wstrict-aliasing=2 \ 132 -fgcse-after-reload \ 133 -frerun-cse-after-loop \ 134 -frename-registers 135 136libc_root := bionic/libc 137libm_root := bionic/libm 138 139TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 140 -print-libgcc-file-name) 141TARGET_LIBATOMIC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 142 -print-file-name=libatomic.a) 143TARGET_LIBGCOV := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \ 144 -print-file-name=libgcov.a) 145 146KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 147KERNEL_HEADERS_COMMON += $(libc_root)/kernel/common 148KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH) 149KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 150 151TARGET_C_INCLUDES := \ 152 $(libc_root)/arch-arm64/include \ 153 $(libc_root)/include \ 154 $(KERNEL_HEADERS) \ 155 $(libm_root)/include \ 156 $(libm_root)/include/arm64 \ 157 158TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 159TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 160TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 161 162TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 163TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 164 165TARGET_PACK_MODULE_RELOCATIONS := true 166 167TARGET_LINKER := /system/bin/linker64 168