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BASE=/data/armv8/marshmallow/
NDK=/SATA3/android-ndk-r10e/
SYSROOT=$(NDK)/platforms/android-21/arch-arm64/
TOOLCHAIN_GOOGLE_64=$(BASE)/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/
INCLUDE_GOOGLE_64=$(OOLCHAIN_GOOGLE_64)/lib/gcc/aarch64-linux-android/4.9.x-google/include
CC_google_64=$(TOOLCHAIN_GOOGLE_64)/bin/aarch64-linux-android-g++
TOOLCHAIN_LINARO_64=$(BASE)/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-5.3-linaro/
INCLUDE_LINARO_64=$(OOLCHAIN_LINARO_64)/lib/gcc/aarch64-linux-android/5.3.0/include
CC_linaro_64=$(TOOLCHAIN_LINARO_64)/bin/aarch64-linux-android-g++
CFLAGS_INCLUDES := \
-isystem $(BASE)/bionic/libc/arch-arm64/include \
-isystem $(BASE)/bionic/libc/include \
-isystem $(BASE)/bionic/libc/kernel/uapi \
-isystem $(BASE)/bionic/libc/kernel/uapi/asm-arm64 \
-isystem $(BASE)/bionic/libm/include \
-isystem $(BASE)/bionic/libm/include/arm64 \
-include $(BASE)/build/core/combo/include/arch/linux-arm64/AndroidConfig.h \
-I $(BASE)/build/core/combo/include/arch/linux-arm64/ \
CFLAGS_OPTIONS_GOOD := \
-fno-strict-aliasing \
-fstack-protector \
-ffunction-sections \
-fdata-sections \
-funwind-tables \
-Wa,--noexecstack \
-Wformat \
-Werror=format-security \
-D_FORTIFY_SOURCE=2 \
-fno-short-enums \
-no-canonical-prefixes \
-fno-canonical-system-headers \
-mcpu=cortex-a53 \
-Werror=pointer-to-int-cast \
-Werror=int-to-pointer-cast \
-Werror=implicit-function-declaration \
-fno-strict-volatile-bitfields \
-Wno-psabi \
-std=c11 \
-O2
# not really necessry but help on more check
CFLAGS_OPTIONS_EXTRA := \
-fno-exceptions \
-Wno-multichar \
-DANDROID \
-fmessage-length=0 \
-W \
-Wall \
-Wno-unused \
-Winit-self \
-Wpointer-arith \
-Werror=return-type \
-Werror=non-virtual-dtor \
-Werror=address \
-Werror=sequence-point \
-g \
-Wstrict-aliasing=2 \
-fgcse-after-reload \
-frerun-cse-after-loop \
-frename-registers \
-DNDEBUG \
-UDEBUG \
-D_USING_LIBCXX \
-Werror=int-to-pointer-cast \
-Werror=pointer-to-int-cast \
LDFLAGS_OPTIONS_GOOD := \
-Wl,-z,noexecstack \
-Wl,-z,relro \
-Wl,-z,now \
-Wl,--build-id=md5 \
-Wl,--warn-shared-textrel \
-Wl,--fatal-warnings \
-Wl,-maarch64linux \
-Wl,--hash-style=gnu \
-Wl,--fix-cortex-a53-843419 \
-Wl,--allow-shlib-undefined \
-Wl,--no-undefined \
#############################################################################
############## meanings of GCC options ######################################
#############################################################################
# -I dir
# Add the directory dir to the list of directories to be searched for header files.
# Directories named by -I are searched before the standard system include directories.
# If the directory dir is a standard system include directory, the option is ignored to ensure that the default search order for system directories and the special treatment of system headers are not defeated .
# If dir begins with "=", then the "=" will be replaced by the sysroot prefix; see --sysroot and -isysroot.
# -isystem dir
# Search dir for header files, after all directories specified by -I but before the standard system directories.
# Mark it as a system directory, so that it gets the same special treatment as is applied to the standard system directories.
# If dir begins with "=", then the "=" will be replaced by the sysroot prefix; see --sysroot and -isysroot.
# -include file
# Process file as if "#include "file"" appeared as the first line of the primary source file.
# However, the first directory searched for file is the preprocessor's working directory instead of the directory containing the main source file.
# If not found there, it is searched for in the remainder of the "#include "..."" search chain as normal.
# If multiple -include options are given, the files are included in the order they appear on the command line.
# -isysroot dir
# This option is like the --sysroot option, but applies only to header files (except for Darwin targets, where it applies to both header files and libraries).
# See the --sysroot option for more information
# --sysroot=dir
# Use dir as the logical root directory for headers and libraries.
# For example, if the compiler normally searches for headers in /usr/include and libraries in /usr/lib,
# it instead searches dir/usr/include and dir/usr/lib.
# If you use both this option and the -isysroot option, then the --sysroot option applies to libraries, but the -isysroot option applies to header files.
# The GNU linker (beginning with version 2.16) has the necessary support for this option.
# If your linker does not support this option, the header file aspect of --sysroot still works, but the library aspect does not.
# -mfloat-abi=name
# Specifies which floating-point ABI to use. Permissible values are: soft, softfp and hard.
# soft causes GCC to generate output containing library calls for floating-point operations.
# softfp allows the generation of code using hardware floating-point instructions, but still uses the soft-float calling conventions.
# hard allows generation of floating-point instructions and uses FPU-specific calling conventions.
#
# The default depends on the specific target configuration.
# Note that the hard-float and soft-float ABIs are not link-compatible;
# you must compile your entire program with the same ABI, and link with a compatible set of libraries.
# -msoft-float
# Use library routines for floating-point operations.
# Not supported by aarch64 gcc
# -mhard-float
# Use hardware instructions for floating-point operations.
# Not supported by aarch64 gcc
# -static
# On systems that support dynamic linking, this prevents linking with the shared libraries.
# On other systems, this option has no effect.
# -nostdlib
# Do not use the standard system startup files or libraries when linking.
# No startup files and only the libraries you specify are passed to the linker, and options specifying linkage of the system libraries,
# such as "-static-libgcc" or "-shared-libgcc", are ignored.
# The compiler may generate calls to "memcmp", "memset", "memcpy" and "memmove".
# These entries are usually resolved by entries in libc.
# These entry points should be supplied through some other mechanism when this option is specified.
#
# One of the standard libraries bypassed by -nostdlib and -nodefaultlibs is libgcc.a,
# a library of internal subroutines which GCC uses to overcome shortcomings of particular machines, or special needs for some languages.
# In most cases, you need libgcc.a even when you want to avoid other standard libraries.
# In other words, when you specify -nostdlib or -nodefaultlibs you should usually specify -lgcc as well.
# This ensures that you have no unresolved references to internal GCC library subroutines.
# (An example of such an internal subroutine is __main, used to ensure C++ constructors are called.)
# -pie
# Produce a position independent executable on targets that support it.
# For predictable results, you must also specify the same set of options used for compilation (-fpie, -fPIE, or model suboptions) when you specify this linker option.
src := main_strcpy.c string_copy_linaro_wrapper.S string_copy_google_wrapper.S
# no need to list asm source files that is included in the .S file
# src += asm/asm.h asm/bionic_asm.h asm/bitsperlong.h asm/unistd.h
## -Wl,--gc-sections -Wl,--whole-archive -Wl,--no-whole-archive and -D_USING_LIBCXX help on building the static link binary
all: strcpy_test_linaro \
strcpy_test_linaro_static \
strcpy_test_google \
strcpy_test_google_static \
move
strcpy_test_linaro_static: $(src)
$(CC_linaro_64) \
$(CFLAGS_INCLUDES) $(CFLAGS_OPTIONS_GOOD) $(CFLAGS_OPTIONS_EXTRA) $(LDFLAGS_OPTIONS_GOOD) \
-nostdlib -static -Bstatic -D_USING_LIBCXX -Wl,--gc-sections -Wl,--whole-archive -Wl,--no-whole-archive \
-o $@ $^ $(SYSROOT)/usr/lib/crtbegin_static.o \
-Wl,--start-group $(SYSROOT)/usr/lib/libc.a $(TOOLCHAIN_LINARO_64)/lib/gcc/aarch64-linux-android/5.3.0/libgcc.a \
-Wl,--end-group $(SYSROOT)/usr/lib/crtend_android.o
strcpy_test_google_static: $(src)
$(CC_google_64) \
$(CFLAGS_INCLUDES) $(CFLAGS_OPTIONS_GOOD) $(CFLAGS_OPTIONS_EXTRA) $(LDFLAGS_OPTIONS_GOOD) \
-nostdlib -static -Bstatic -D_USING_LIBCXX -Wl,--gc-sections -Wl,--whole-archive -Wl,--no-whole-archive \
-o $@ $^ $(SYSROOT)/usr/lib/crtbegin_static.o \
-Wl,--start-group $(SYSROOT)/usr/lib/libc.a $(TOOLCHAIN_GOOGLE_64)/lib/gcc/aarch64-linux-android/4.9.x-google/libgcc.a \
-Wl,--end-group $(SYSROOT)/usr/lib/crtend_android.o
strcpy_test_linaro: $(src)
$(CC_linaro_64) $(CFLAGS_INCLUDES) $(CFLAGS_OPTIONS_GOOD) $(CFLAGS_OPTIONS_EXTRA) $(LDFLAGS_OPTIONS_GOOD) \
--sysroot=$(SYSROOT) \
-fPIE -pie \
$^ -o $@
strcpy_test_google: $(src)
$(CC_google_64) $(CFLAGS_INCLUDES) $(CFLAGS_OPTIONS_GOOD) $(CFLAGS_OPTIONS_EXTRA) $(LDFLAGS_OPTIONS_GOOD) \
--sysroot=$(SYSROOT) \
-fPIE -pie \
$^ -o $@
move:
@mkdir -p bin/
@mv -v strcpy_test* bin/
clean:
rm -vf bin/strcpy_test*
|
