f5862d8da6
This patch modifies the NDK build scripts to support the 'armeabi-v7a' ABI. (For the record, it corresponds to Thumb-2 + FPU support, to speed up native code on certain devices like the Droid). To build for this ABI, the Application.mk file should use a line like: APP_ABI := armeabi-v7a It is also possible to build for both 'armeabi' and 'armeabi-v7a' by using: APP_ABI := armeabi armeabi-v7a This will result in the generation of two distinct shared libraries that both will be copied to the final application package. This is dependent on having GCC 4.4.0 prebuilt binaries under build/prebuilt/<host>/arm-eabi-4.4.0, since gcc 4.2.1 does not support this new ABI. Note that this also changes the NDK to use gcc 4.4.0 by default, unless the user defines NDK_TOOLCHAIN to 'arm-eabi-4.2.1' in its environment to switch back to the previous one.
140 lines
4.5 KiB
Makefile
140 lines
4.5 KiB
Makefile
# Copyright (C) 2009 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# this file is used to prepare the NDK to build with the arm-eabi-4.4.0
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# toolchain any number of source files
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#
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# its purpose is to define (or re-define) templates used to build
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# various sources into target object files, libraries or executables.
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#
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# Note that this file may end up being parsed several times in future
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# revisions of the NDK.
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#
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TOOLCHAIN_NAME := arm-eabi-4.4.0
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TOOLCHAIN_PREFIX := $(HOST_PREBUILT)/$(TOOLCHAIN_NAME)/bin/arm-eabi-
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TARGET_CFLAGS.common := \
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-I$(SYSROOT)/usr/include \
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-fpic \
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-mthumb-interwork \
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-ffunction-sections \
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-funwind-tables \
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-fstack-protector \
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-fno-short-enums \
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-D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ \
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-D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ \
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ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
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TARGET_ARCH_CFLAGS := -march=armv7-a \
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-mfloat-abi=softfp \
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-mfpu=neon
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TARGET_ARCH_LDFLAGS := -Wl,--fix-cortex-a8
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else
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TARGET_ARCH_CFLAGS := -march=armv5te \
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-mtune=xscale \
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-msoft-float
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TARGET_ARCH_LDFLAGS :=
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endif
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TARGET_arm_release_CFLAGS := -O2 \
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-fomit-frame-pointer \
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-fstrict-aliasing \
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-funswitch-loops \
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-finline-limit=300
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TARGET_thumb_release_CFLAGS := -mthumb \
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-Os \
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-fomit-frame-pointer \
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-fno-strict-aliasing \
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-finline-limit=64
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# When building for debug, compile everything as arm.
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TARGET_arm_debug_CFLAGS := $(TARGET_arm_release_CFLAGS) \
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-fno-omit-frame-pointer \
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-fno-strict-aliasing
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TARGET_thumb_debug_CFLAGS := $(TARGET_thumb_release_CFLAGS) \
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-marm \
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-fno-omit-frame-pointer
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TARGET_CC := $(TOOLCHAIN_PREFIX)gcc
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TARGET_CFLAGS := $(TARGET_CFLAGS.common) $(TARGET_ARCH_CFLAGS)
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TARGET_CXX := $(TOOLCHAIN_PREFIX)g++
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TARGET_CXXFLAGS := $(TARGET_CFLAGS.common) $(TARGET_ARCH_CFLAGS) -fno-exceptions -fno-rtti
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TARGET_LD := $(TOOLCHAIN_PREFIX)ld
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TARGET_LDFLAGS := $(TARGET_ARCH_LDFLAGS)
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TARGET_AR := $(TOOLCHAIN_PREFIX)ar
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TARGET_ARFLAGS := crs
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TARGET_LIBGCC := $(shell $(TARGET_CC) -mthumb-interwork -print-libgcc-file-name)
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TARGET_LDLIBS := -Wl,-rpath-link=$(SYSROOT)/usr/lib
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# These flags are used to ensure that a binary doesn't reference undefined
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# flags.
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TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
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# NOTE: Ensure that TARGET_LIBGCC is placed after all private objects
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# and static libraries, but before any other library in the link
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# command line when generating shared libraries and executables.
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#
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# This ensures that all libgcc.a functions required by the target
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# will be included into it, instead of relying on what's available
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# on other libraries like libc.so, which may change between system
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# releases due to toolchain or library changes.
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#
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define cmd-build-shared-library
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$(TARGET_CC) \
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-nostdlib -Wl,-soname,$(notdir $@) \
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-Wl,-shared,-Bsymbolic \
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$(PRIVATE_OBJECTS) \
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-Wl,--whole-archive \
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$(PRIVATE_WHOLE_STATIC_LIBRARIES) \
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-Wl,--no-whole-archive \
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$(PRIVATE_STATIC_LIBRARIES) \
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$(TARGET_LIBGCC) \
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$(PRIVATE_SHARED_LIBRARIES) \
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$(PRIVATE_LDFLAGS) \
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$(PRIVATE_LDLIBS) \
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-o $@
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endef
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define cmd-build-executable
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$(TARGET_CC) \
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-nostdlib -Bdynamic \
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-Wl,-dynamic-linker,/system/bin/linker \
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-Wl,--gc-sections \
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-Wl,-z,nocopyreloc \
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$(TARGET_CRTBEGIN_DYNAMIC_O) \
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$(PRIVATE_OBJECTS) \
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$(PRIVATE_STATIC_LIBRARIES) \
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$(TARGET_LIBGCC) \
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$(PRIVATE_SHARED_LIBRARIES) \
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$(PRIVATE_LDFLAGS) \
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$(PRIVATE_LDLIBS) \
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$(TARGET_CRTEND_O) \
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-o $@
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endef
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define cmd-build-static-library
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$(TARGET_AR) $(TARGET_ARFLAGS) $@ $(PRIVATE_OBJECTS)
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endef
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cmd-strip = $(TOOLCHAIN_PREFIX)strip --strip-debug $1
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