TARGET_linux-arm.mk revision bf8346e90c5a6d5d809fa7166d50714b2b6bc30d
1# 2# Copyright (C) 2006 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 $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),) 34TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := armv5te 35endif 36 37# Decouple NDK library selection with platform compiler version 38$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.9 39 40ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 41$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.9 42else 43$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 44endif 45 46TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk 47ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 48$(error Unknown ARM architecture version: $(TARGET_$(combo_2nd_arch_prefix)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 $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),) 56$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION) 57$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi- 58endif 59 60$(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX) 61$(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX) 62$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX) 63$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX) 64$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX) 65$(combo_2nd_arch_prefix)TARGET_READELF := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX) 66$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX) 67 68$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 69 70$(combo_2nd_arch_prefix)TARGET_arm_CFLAGS := -O2 \ 71 -fomit-frame-pointer \ 72 -fstrict-aliasing \ 73 -funswitch-loops 74 75# Modules can choose to compile some source as thumb. 76$(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS := -mthumb \ 77 -Os \ 78 -fomit-frame-pointer \ 79 -fno-strict-aliasing 80 81# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 82# or in your environment to force a full arm build, even for 83# files that are normally built as thumb; this can make 84# gdb debugging easier. Don't forget to do a clean build. 85# 86# NOTE: if you try to build a -O0 build with thumb, several 87# of the libraries (libpv, libwebcore, libkjs) need to be built 88# with -mlong-calls. When built at -O0, those libraries are 89# too big for a thumb "BL <label>" to go from one end to the other. 90ifeq ($(FORCE_ARM_DEBUGGING),true) 91 $(combo_2nd_arch_prefix)TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 92 $(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 93endif 94 95android_config_h := $(call select-android-config-h,linux-arm) 96 97$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \ 98 -msoft-float \ 99 -ffunction-sections \ 100 -fdata-sections \ 101 -funwind-tables \ 102 -fstack-protector \ 103 -Wa,--noexecstack \ 104 -Werror=format-security \ 105 -D_FORTIFY_SOURCE=2 \ 106 -fno-short-enums \ 107 -no-canonical-prefixes \ 108 -fno-canonical-system-headers \ 109 $(arch_variant_cflags) \ 110 -include $(android_config_h) \ 111 -I $(dir $(android_config_h)) 112 113# The "-Wunused-but-set-variable" option often breaks projects that enable 114# "-Wall -Werror" due to a commom idiom "ALOGV(mesg)" where ALOGV is turned 115# into no-op in some builds while mesg is defined earlier. So we explicitly 116# disable "-Wunused-but-set-variable" here. 117ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8 4.9, $($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)),) 118$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -fno-builtin-sin \ 119 -fno-strict-volatile-bitfields 120endif 121 122# This is to avoid the dreaded warning compiler message: 123# note: the mangling of 'va_list' has changed in GCC 4.4 124# 125# The fact that the mangling changed does not affect the NDK ABI 126# very fortunately (since none of the exposed APIs used va_list 127# in their exported C++ functions). Also, GCC 4.5 has already 128# removed the warning from the compiler. 129# 130$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -Wno-psabi 131 132$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += \ 133 -Wl,-z,noexecstack \ 134 -Wl,-z,relro \ 135 -Wl,-z,now \ 136 -Wl,--warn-shared-textrel \ 137 -Wl,--fatal-warnings \ 138 -Wl,--icf=safe \ 139 -Wl,--hash-style=gnu \ 140 $(arch_variant_ldflags) 141 142$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -mthumb-interwork 143 144$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 145 146# More flags/options can be added here 147$(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS := \ 148 -DNDEBUG \ 149 -g \ 150 -Wstrict-aliasing=2 \ 151 -fgcse-after-reload \ 152 -frerun-cse-after-loop \ 153 -frename-registers 154 155libc_root := bionic/libc 156libm_root := bionic/libm 157 158 159## on some hosts, the target cross-compiler is not available so do not run this command 160ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),) 161# We compile with the global cflags to ensure that 162# any flags which affect libgcc are correctly taken 163# into account. 164$(combo_2nd_arch_prefix)TARGET_LIBGCC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 165 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 166$(combo_2nd_arch_prefix)TARGET_LIBATOMIC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 167 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libatomic.a) 168$(combo_2nd_arch_prefix)TARGET_LIBGCOV := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 169 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcov.a) 170endif 171 172KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 173KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_$(combo_2nd_arch_prefix)ARCH) 174KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 175 176$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \ 177 $(libc_root)/arch-arm/include \ 178 $(libc_root)/include \ 179 $(KERNEL_HEADERS) \ 180 $(libm_root)/include \ 181 $(libm_root)/include/arm \ 182 183$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 184$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 185$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 186 187$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 188$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 189 190$(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true 191 192$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm 193 194$(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker 195