TARGET_linux-arm.mk revision 43146118aab8e15e8ed4f859106d8ddccc06d21b
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# $(BUILD_COMBOS)/arch/<name>.mk which must contain 23# makefile variable definitions. Their 24# purpose is to allow module Android.mk files to selectively compile 25# different versions of code based upon the funtionality and 26# instructions available in a given architecture version. 27# 28# The blocks also define specific arch_variant_cflags, which 29# include defines, and compiler settings for the given architecture 30# version. 31# 32ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),) 33TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := armv5te 34endif 35 36# Decouple NDK library selection with platform compiler version 37$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.9 38 39ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),) 40$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.9 41else 42$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP) 43endif 44 45TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk 46ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),) 47$(error Unknown ARM architecture version: $(TARGET_$(combo_2nd_arch_prefix)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 $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),) 55$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION) 56$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi- 57endif 58 59$(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc 60$(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)g++ 61$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar 62$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy 63$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld 64$(combo_2nd_arch_prefix)TARGET_READELF := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)readelf 65$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip 66 67$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 68 69$(combo_2nd_arch_prefix)TARGET_arm_CFLAGS := -O2 \ 70 -fomit-frame-pointer \ 71 -fstrict-aliasing \ 72 -funswitch-loops 73 74# Modules can choose to compile some source as thumb. 75$(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS := -mthumb \ 76 -Os \ 77 -fomit-frame-pointer \ 78 -fno-strict-aliasing 79 80# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 81# or in your environment to force a full arm build, even for 82# files that are normally built as thumb; this can make 83# gdb debugging easier. Don't forget to do a clean build. 84# 85# NOTE: if you try to build a -O0 build with thumb, several 86# of the libraries (libpv, libwebcore, libkjs) need to be built 87# with -mlong-calls. When built at -O0, those libraries are 88# too big for a thumb "BL <label>" to go from one end to the other. 89ifeq ($(FORCE_ARM_DEBUGGING),true) 90 $(combo_2nd_arch_prefix)TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 91 $(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 92endif 93 94$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \ 95 -msoft-float \ 96 -ffunction-sections \ 97 -fdata-sections \ 98 -funwind-tables \ 99 -fstack-protector \ 100 -Wa,--noexecstack \ 101 -Werror=format-security \ 102 -D_FORTIFY_SOURCE=2 \ 103 -fno-short-enums \ 104 -no-canonical-prefixes \ 105 -fno-canonical-system-headers \ 106 $(arch_variant_cflags) \ 107 108# The "-Wunused-but-set-variable" option often breaks projects that enable 109# "-Wall -Werror" due to a commom idiom "ALOGV(mesg)" where ALOGV is turned 110# into no-op in some builds while mesg is defined earlier. So we explicitly 111# disable "-Wunused-but-set-variable" here. 112ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8 4.9, $($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)),) 113$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -fno-builtin-sin \ 114 -fno-strict-volatile-bitfields 115endif 116 117# This is to avoid the dreaded warning compiler message: 118# note: the mangling of 'va_list' has changed in GCC 4.4 119# 120# The fact that the mangling changed does not affect the NDK ABI 121# very fortunately (since none of the exposed APIs used va_list 122# in their exported C++ functions). Also, GCC 4.5 has already 123# removed the warning from the compiler. 124# 125$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -Wno-psabi 126 127$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += \ 128 -Wl,-z,noexecstack \ 129 -Wl,-z,relro \ 130 -Wl,-z,now \ 131 -Wl,--build-id=md5 \ 132 -Wl,--warn-shared-textrel \ 133 -Wl,--fatal-warnings \ 134 -Wl,--icf=safe \ 135 -Wl,--hash-style=gnu \ 136 $(arch_variant_ldflags) 137 138$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -mthumb-interwork 139 140$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 141 142# More flags/options can be added here 143$(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS := \ 144 -DNDEBUG \ 145 -g \ 146 -Wstrict-aliasing=2 \ 147 -fgcse-after-reload \ 148 -frerun-cse-after-loop \ 149 -frename-registers 150 151libc_root := bionic/libc 152libm_root := bionic/libm 153 154 155## on some hosts, the target cross-compiler is not available so do not run this command 156ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),) 157# We compile with the global cflags to ensure that 158# any flags which affect libgcc are correctly taken 159# into account. 160$(combo_2nd_arch_prefix)TARGET_LIBGCC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 161 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 162$(combo_2nd_arch_prefix)TARGET_LIBATOMIC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 163 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libatomic.a) 164$(combo_2nd_arch_prefix)TARGET_LIBGCOV := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 165 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcov.a) 166endif 167 168KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 169KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_$(combo_2nd_arch_prefix)ARCH) 170KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 171 172$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \ 173 $(libc_root)/arch-arm/include \ 174 $(libc_root)/include \ 175 $(KERNEL_HEADERS) \ 176 $(libm_root)/include \ 177 $(libm_root)/include/arm \ 178 179$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 180$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 181$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 182 183$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 184$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 185 186$(combo_2nd_arch_prefix)TARGET_PACK_MODULE_RELOCATIONS := true 187 188$(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker 189