core/combo/TARGET_linux-arm.mk

   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 # $(BUILD_COMBOS)/arch/<name>.mk which must contain
  23 # makefile variable definitions similar to the preprocessor
  24 # defines in build/core/combo/include/arch/<combo>/AndroidConfig.h. Their
  25 # purpose is to allow module Android.mk files to selectively compile
  26 # different versions of code based upon the funtionality and
  27 # instructions available in a given architecture version.
  28 #
  29 # The blocks also define specific arch_variant_cflags, which
  30 # include defines, and compiler settings for the given architecture
  31 # version.
  32 #
  33 ifeq ($(strip $(TARGET_ARCH_VARIANT)),)
  34 TARGET_ARCH_VARIANT := armv5te
  35 endif
  36
  37 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
  38 TARGET_GCC_VERSION := 4.7
  39 else
  40 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
  41 endif
  42
  43 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
  44 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
  45 $(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT))
  46 endif
  47
  48 include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
  49
  50 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
  51 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
  52 TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-$(TARGET_GCC_VERSION)
  53 TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi-
  54 endif
  55
  56 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
  57 TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
  58 TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
  59 TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
  60 TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
  61 TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
  62 ifeq ($(TARGET_BUILD_VARIANT),user)
  63     TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@
  64 else
  65     TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ && \
  66         $(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@
  67 endif
  68
  69 TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
  70
  71 TARGET_arm_CFLAGS :=    -O2 \
  72                         -fomit-frame-pointer \
  73                         -fstrict-aliasing    \
  74                         -funswitch-loops
  75
  76 # Modules can choose to compile some source as thumb.
  77 TARGET_thumb_CFLAGS :=  -mthumb \
  78                         -Os \
  79                         -fomit-frame-pointer \
  80                         -fno-strict-aliasing
  81
  82 # Set FORCE_ARM_DEBUGGING to "true" in your buildspec.mk
  83 # or in your environment to force a full arm build, even for
  84 # files that are normally built as thumb; this can make
  85 # gdb debugging easier.  Don't forget to do a clean build.
  86 #
  87 # NOTE: if you try to build a -O0 build with thumb, several
  88 # of the libraries (libpv, libwebcore, libkjs) need to be built
  89 # with -mlong-calls.  When built at -O0, those libraries are
  90 # too big for a thumb "BL <label>" to go from one end to the other.
  91 ifeq ($(FORCE_ARM_DEBUGGING),true)
  92   TARGET_arm_CFLAGS += -fno-omit-frame-pointer -fno-strict-aliasing
  93   TARGET_thumb_CFLAGS += -marm -fno-omit-frame-pointer
  94 endif
  95
  96 TARGET_GLOBAL_CFLAGS += \
  97                         -msoft-float -fpic -fPIE \
  98                         -ffunction-sections \
  99                         -fdata-sections \
 100                         -funwind-tables \
 101                         -fstack-protector \
 102                         -Wa,--noexecstack \
 103                         -Werror=format-security \
 104                         -D_FORTIFY_SOURCE=1 \
 105                         -fno-short-enums \
 106                         $(arch_variant_cflags)
 107
 108 android_config_h := $(call select-android-config-h,linux-arm)
 109 TARGET_ANDROID_CONFIG_CFLAGS := -include $(android_config_h) -I $(dir $(android_config_h))
 110 TARGET_GLOBAL_CFLAGS += $(TARGET_ANDROID_CONFIG_CFLAGS)
 111
 112 # This warning causes dalvik not to build with gcc 4.6+ and -Werror.
 113 # We cannot turn it off blindly since the option is not available
 114 # in gcc-4.4.x.  We also want to disable sincos optimization globally
 115 # by turning off the builtin sin function.
 116 ifneq ($(filter 4.6 4.6.% 4.7 4.7.%, $(TARGET_GCC_VERSION)),)
 117 TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable -fno-builtin-sin \
 118                         -fno-strict-volatile-bitfields
 119 endif
 120
 121 # This is to avoid the dreaded warning compiler message:
 122 #   note: the mangling of 'va_list' has changed in GCC 4.4
 123 #
 124 # The fact that the mangling changed does not affect the NDK ABI
 125 # very fortunately (since none of the exposed APIs used va_list
 126 # in their exported C++ functions). Also, GCC 4.5 has already
 127 # removed the warning from the compiler.
 128 #
 129 TARGET_GLOBAL_CFLAGS += -Wno-psabi
 130
 131 TARGET_GLOBAL_LDFLAGS += \
 132                         -Wl,-z,noexecstack \
 133                         -Wl,-z,relro \
 134                         -Wl,-z,now \
 135                         -Wl,--warn-shared-textrel \
 136                         -Wl,--fatal-warnings \
 137                         -Wl,--icf=safe \
 138                         $(arch_variant_ldflags)
 139
 140 TARGET_GLOBAL_CFLAGS += -mthumb-interwork
 141
 142 TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
 143
 144 # More flags/options can be added here
 145 TARGET_RELEASE_CFLAGS := \
 146                         -DNDEBUG \
 147                         -g \
 148                         -Wstrict-aliasing=2 \
 149                         -fgcse-after-reload \
 150                         -frerun-cse-after-loop \
 151                         -frename-registers
 152
 153 libc_root := bionic/libc
 154 libm_root := bionic/libm
 155 libstdc++_root := bionic/libstdc++
 156 libthread_db_root := bionic/libthread_db
 157
 158
 159 ## on some hosts, the target cross-compiler is not available so do not run this command
 160 ifneq ($(wildcard $(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 TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name)
 165 target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
 166         -print-file-name=libgcov.a)
 167 endif
 168
 169 # Define FDO (Feedback Directed Optimization) options.
 170
 171 TARGET_FDO_CFLAGS:=
 172 TARGET_FDO_LIB:=
 173
 174 ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
 175   # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
 176   # The profile will be generated on /data/local/tmp/profile on the device.
 177   TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
 178   TARGET_FDO_LIB := $(target_libgcov)
 179 else
 180   # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
 181   # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
 182   ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
 183     TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
 184   else
 185     ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
 186       $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
 187     endif
 188   endif
 189
 190   # If the FDO profile directory can't be found, then FDO is off.
 191   ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
 192     TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
 193     TARGET_FDO_LIB := $(target_libgcov)
 194   endif
 195 endif
 196
 197
 198 # unless CUSTOM_KERNEL_HEADERS is defined, we're going to use
 199 # symlinks located in out/ to point to the appropriate kernel
 200 # headers. see 'config/kernel_headers.make' for more details
 201 #
 202 ifneq ($(CUSTOM_KERNEL_HEADERS),)
 203     KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS)
 204     KERNEL_HEADERS_ARCH   := $(CUSTOM_KERNEL_HEADERS)
 205 else
 206     KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common
 207     KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/arch-$(TARGET_ARCH)
 208 endif
 209 KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
 210
 211 TARGET_C_INCLUDES := \
 212         $(libc_root)/arch-arm/include \
 213         $(libc_root)/include \
 214         $(libstdc++_root)/include \
 215         $(KERNEL_HEADERS) \
 216         $(libm_root)/include \
 217         $(libm_root)/include/arm \
 218         $(libthread_db_root)/include
 219
 220 TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
 221 TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
 222 TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
 223
 224 TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
 225 TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
 226
 227 TARGET_STRIP_MODULE:=true
 228
 229 TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
 230
 231 TARGET_CUSTOM_LD_COMMAND := true
 232
 233 define transform-o-to-shared-lib-inner
 234 $(hide) $(PRIVATE_CXX) \
 235         -nostdlib -Wl,-soname,$(notdir $@) \
 236         -Wl,--gc-sections \
 237         -Wl,-shared,-Bsymbolic \
 238         $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 239         $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
 240         $(PRIVATE_ALL_OBJECTS) \
 241         -Wl,--whole-archive \
 242         $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 243         -Wl,--no-whole-archive \
 244         $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
 245         $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 246         $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
 247         $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
 248         -o $@ \
 249         $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 250         $(PRIVATE_LDFLAGS) \
 251         $(PRIVATE_TARGET_FDO_LIB) \
 252         $(PRIVATE_TARGET_LIBGCC) \
 253         $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
 254 endef
 255
 256 define transform-o-to-executable-inner
 257 $(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \
 258         -Wl,-dynamic-linker,/system/bin/linker \
 259         -Wl,--gc-sections \
 260         -Wl,-z,nocopyreloc \
 261         -o $@ \
 262         $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 263         -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 264         $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
 265         $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 266         $(PRIVATE_ALL_OBJECTS) \
 267         -Wl,--whole-archive \
 268         $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 269         -Wl,--no-whole-archive \
 270         $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
 271         $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 272         $(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
 273         $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 274         $(PRIVATE_LDFLAGS) \
 275         $(PRIVATE_TARGET_FDO_LIB) \
 276         $(PRIVATE_TARGET_LIBGCC) \
 277         $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 278 endef
 279
 280 define transform-o-to-static-executable-inner
 281 $(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \
 282         -Wl,--gc-sections \
 283         -o $@ \
 284         $(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 285         $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \
 286         $(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 287         $(PRIVATE_LDFLAGS) \
 288         $(PRIVATE_ALL_OBJECTS) \
 289         -Wl,--whole-archive \
 290         $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 291         -Wl,--no-whole-archive \
 292         $(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
 293         -Wl,--start-group \
 294         $(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 295         $(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 296         $(PRIVATE_TARGET_FDO_LIB) \
 297         $(PRIVATE_TARGET_LIBGCC) \
 298         -Wl,--end-group \
 299         $(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 300 endef