TARGET_linux-arm.mk revision 0e7587a9ea58b69c9daa43cd682a4657d23b9b23
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$(combo_2nd_arch_prefix)TARGET_NM := $($(combo_2nd_arch_prefix)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 72$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined 73 74$(combo_2nd_arch_prefix)TARGET_arm_CFLAGS := -O2 \ 75 -fomit-frame-pointer \ 76 -fstrict-aliasing \ 77 -funswitch-loops 78 79# Modules can choose to compile some source as thumb. 80$(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS := -mthumb \ 81 -Os \ 82 -fomit-frame-pointer \ 83 -fno-strict-aliasing 84 85# Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk 86# or in your environment to force a full arm build, even for 87# files that are normally built as thumb; this can make 88# gdb debugging easier. Don't forget to do a clean build. 89# 90# NOTE: if you try to build a -O0 build with thumb, several 91# of the libraries (libpv, libwebcore, libkjs) need to be built 92# with -mlong-calls. When built at -O0, those libraries are 93# too big for a thumb "BL <label>" to go from one end to the other. 94ifeq ($(FORCE_ARM_DEBUGGING),true) 95 $(combo_2nd_arch_prefix)TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing 96 $(combo_2nd_arch_prefix)TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer 97endif 98 99$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \ 100 -msoft-float \ 101 -ffunction-sections \ 102 -fdata-sections \ 103 -funwind-tables \ 104 -fstack-protector \ 105 -Wa,--noexecstack \ 106 -Werror=format-security \ 107 -D_FORTIFY_SOURCE=2 \ 108 -fno-short-enums \ 109 -no-canonical-prefixes \ 110 -fno-canonical-system-headers \ 111 $(arch_variant_cflags) \ 112 113# The "-Wunused-but-set-variable" option often breaks projects that enable 114# "-Wall -Werror" due to a commom idiom "ALOGV(mesg)" where ALOGV is turned 115# into no-op in some builds while mesg is defined earlier. So we explicitly 116# disable "-Wunused-but-set-variable" here. 117ifneq ($(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,--build-id=md5 \ 137 -Wl,--warn-shared-textrel \ 138 -Wl,--fatal-warnings \ 139 -Wl,--icf=safe \ 140 -Wl,--hash-style=gnu \ 141 $(arch_variant_ldflags) 142 143$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -mthumb-interwork 144 145$(combo_2nd_arch_prefix)TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden 146 147# More flags/options can be added here 148$(combo_2nd_arch_prefix)TARGET_RELEASE_CFLAGS := \ 149 -DNDEBUG \ 150 -g \ 151 -Wstrict-aliasing=2 \ 152 -fgcse-after-reload \ 153 -frerun-cse-after-loop \ 154 -frename-registers 155 156libc_root := bionic/libc 157libm_root := bionic/libm 158 159 160## on some hosts, the target cross-compiler is not available so do not run this command 161ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),) 162# We compile with the global cflags to ensure that 163# any flags which affect libgcc are correctly taken 164# into account. 165$(combo_2nd_arch_prefix)TARGET_LIBGCC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 166 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name) 167$(combo_2nd_arch_prefix)TARGET_LIBATOMIC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 168 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libatomic.a) 169$(combo_2nd_arch_prefix)TARGET_LIBGCOV := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \ 170 $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcov.a) 171endif 172 173KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi 174KERNEL_HEADERS_COMMON += $(libc_root)/kernel/common 175KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_$(combo_2nd_arch_prefix)ARCH) 176KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH) 177 178$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \ 179 $(libc_root)/arch-arm/include \ 180 $(libc_root)/include \ 181 $(KERNEL_HEADERS) \ 182 $(libm_root)/include \ 183 $(libm_root)/include/arm \ 184 185$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o 186$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o 187$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o 188 189$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o 190$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o 191 192$(combo_2nd_arch_prefix)TARGET_PACK_MODULE_RELOCATIONS := true 193 194$(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker 195