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platform_build/core/combo/TARGET_linux-x86.mk
Ying Wang e1d44c3b4a Load compiler environment for a second arch. 
This is the first step to build 32-bit libraries in a 64-bit product.
It will work like this:
1) In the product's BoardConfig.mk, define:
TARGET_2ND_ARCH, TARGET_2ND_ARCH_VARIANT, TARGET_2ND_CPU_VARIANT.
The build system uses those variables to set up an additional compiler
environment for the second arch.

2) When parsing Android.mks, the build system sets up rules to build a
module for both the 1st arch and the 2nd arch, unless it's explicitly
asked to skip so.
Android.mk will be adapted if there is additional rule of generating
source files.
The build system will accept arch-specific LOCAL_ variables, such as
LOCAL_CFLAGS_arm, LOCAL_CFLAGS_armv7-a-neon, LOCAL_CFLAGS_cortex-a15,
LOCAL_CFLAGS_aarch64 etc. Modules use such variables to set up build for
various archs at the same time.

3) Install binary of the 2nd arch by adding "<module_name>:32" to
PRODUCT_PACKAGES. All 2nd-arch libraries linked in by "<module_name>:32"
will be installed automatically.

Bug: 11654773
Change-Id: I2df63cd5463a07bf5358bee2a109f8fb9590fe30
2014-01-16 14:30:02 -08:00

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Makefile
Executable file
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#
# Copyright (C) 2006 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Configuration for Linux on x86 as a target.
# Included by combo/select.mk
# Provide a default variant.
ifeq ($(strip $(TARGET_ARCH_VARIANT)),)
TARGET_ARCH_VARIANT := x86
endif
ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
TARGET_GCC_VERSION := 4.8
else
TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
endif
# Include the arch-variant-specific configuration file.
# Its role is to define various ARCH_X86_HAVE_XXX feature macros,
# plus initial values for TARGET_GLOBAL_CFLAGS
#
TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
$(error Unknown $(TARGET_ARCH) architecture version: $(TARGET_ARCH_VARIANT))
endif
include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/x86_64-linux-android-$(TARGET_GCC_VERSION)
TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/x86_64-linux-android-
endif
TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
ifeq ($(TARGET_BUILD_VARIANT),user)
TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@
else
TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@ && \
$(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
endif
ifneq ($(wildcard $(TARGET_CC)),)
TARGET_LIBGCC := \
$(shell $(TARGET_CC) -m32 -print-file-name=libgcc.a)
target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
-print-file-name=libgcov.a)
endif
TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
libc_root := bionic/libc
libm_root := bionic/libm
libstdc++_root := bionic/libstdc++
libthread_db_root := bionic/libthread_db
# Define FDO (Feedback Directed Optimization) options.
TARGET_FDO_CFLAGS:=
TARGET_FDO_LIB:=
ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
# Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
# The profile will be generated on /data/local/tmp/profile on the device.
TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
TARGET_FDO_LIB := $(target_libgcov)
else
# If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
# Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
else
ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
$(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
endif
endif
# If the FDO profile directory can't be found, then FDO is off.
ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
TARGET_FDO_LIB := $(target_libgcov)
endif
endif
KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
KERNEL_HEADERS_ARCH := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH)
KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
android_config_h := $(call select-android-config-h,target_linux-x86)
TARGET_GLOBAL_CFLAGS += \
-O2 \
-Ulinux \
-Wa,--noexecstack \
-Werror=format-security \
-D_FORTIFY_SOURCE=2 \
-Wstrict-aliasing=2 \
-fPIC -fPIE \
-ffunction-sections \
-finline-functions \
-finline-limit=300 \
-fno-inline-functions-called-once \
-fno-short-enums \
-fstrict-aliasing \
-funswitch-loops \
-funwind-tables \
-fstack-protector \
-m32 \
-include $(android_config_h) \
-I $(dir $(android_config_h))
TARGET_GLOBAL_CFLAGS += $(arch_variant_cflags)
ifeq ($(ARCH_X86_HAVE_SSSE3),true) # yes, really SSSE3, not SSE3!
TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 -mssse3
endif
ifeq ($(ARCH_X86_HAVE_SSE4),true)
TARGET_GLOBAL_CFLAGS += -msse4
endif
ifeq ($(ARCH_X86_HAVE_SSE4_1),true)
TARGET_GLOBAL_CFLAGS += -msse4.1
endif
ifeq ($(ARCH_X86_HAVE_SSE4_2),true)
TARGET_GLOBAL_CFLAGS += -msse4.2
endif
ifeq ($(ARCH_X86_HAVE_AVX),true)
TARGET_GLOBAL_CFLAGS += -mavx
endif
ifeq ($(ARCH_X86_HAVE_AES_NI),true)
TARGET_GLOBAL_CFLAGS += -maes
endif
TARGET_GLOBAL_LDFLAGS += -m32
TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack
TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now
TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel
TARGET_GLOBAL_LDFLAGS += -Wl,--fatal-warnings
TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections
TARGET_C_INCLUDES := \
$(libc_root)/arch-x86/include \
$(libc_root)/include \
$(libstdc++_root)/include \
$(KERNEL_HEADERS) \
$(libm_root)/include \
$(libm_root)/include/i387 \
$(libthread_db_root)/include
TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
TARGET_STRIP_MODULE:=true
TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
TARGET_CUSTOM_LD_COMMAND := true
define transform-o-to-shared-lib-inner
$(hide) $(PRIVATE_CXX) \
$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
-nostdlib -Wl,-soname,$(notdir $@) \
-shared -Bsymbolic \
$(TARGET_GLOBAL_CFLAGS) \
$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
$(PRIVATE_ALL_OBJECTS) \
-Wl,--whole-archive \
$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
-Wl,--no-whole-archive \
$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
$(PRIVATE_TARGET_LIBGCC) \
$(PRIVATE_TARGET_FDO_LIB) \
$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
-o $@ \
$(PRIVATE_LDFLAGS) \
$(PRIVATE_TARGET_LIBGCC) \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
endef
define transform-o-to-executable-inner
$(hide) $(PRIVATE_CXX) \
$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
-nostdlib -Bdynamic \
-Wl,-z,nocopyreloc \
-fPIE -pie \
$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
$(PRIVATE_ALL_OBJECTS) \
-Wl,--whole-archive \
$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
-Wl,--no-whole-archive \
$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
$(PRIVATE_TARGET_LIBGCC) \
$(PRIVATE_TARGET_FDO_LIB) \
$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
-o $@ \
$(PRIVATE_LDFLAGS) \
$(PRIVATE_TARGET_LIBGCC) \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
endef
define transform-o-to-static-executable-inner
$(hide) $(PRIVATE_CXX) \
$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
-nostdlib -Bstatic \
-o $@ \
$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \
$(PRIVATE_LDFLAGS) \
$(PRIVATE_ALL_OBJECTS) \
-Wl,--whole-archive \
$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
-Wl,--no-whole-archive \
-Wl,--start-group \
$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
$(PRIVATE_TARGET_FDO_LIB) \
$(PRIVATE_TARGET_LIBGCC) \
-Wl,--end-group \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
endef
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