OpenHarmony设备开发 轻量和小型系统三方库移植指导

set(CMAKE_CROSSCOMPILING TRUE)
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_CXX_COMPILER_ID Clang)
set(CMAKE_TOOLCHAIN_PREFIX llvm-)
#指定c编译工具（确保工具链所在路径已经添加到了PATH环境变量中）和编译标志，使用clang编译时标志中必须指定--target，否则无法交叉编译。
set(CMAKE_C_COMPILER clang)
set(CMAKE_C_FLAGS "--target=arm-liteos -D__clang__ -march=armv7-a -w -mfloat-abi=softfp -mcpu=cortex-a7 -mfpu=neon-vfpv4")
#指定c++编译工具（确保工具链所在路径已经添加到了PATH环境变量中）和编译标志，必须指定--target，否则无法交叉编译。
set(CMAKE_CXX_COMPILER clang++) 
set(CMAKE_CXX_FLAGS "--target=arm-liteos -D__clang__ -march=armv7-a -w -mfloat-abi=softfp -mcpu=cortex-a7 -mfpu=neon-vfpv4")
#指定链接工具和链接标志，必须指定--target和--sysroot，其中OHOS_ROOT_PATH可通过cmake命令后缀参数来指定。
set(MY_LINK_FLAGS "--target=arm-liteos --sysroot=${OHOS_SYSROOT_PATH}")
set(CMAKE_LINKER clang)
set(CMAKE_CXX_LINKER clang++)
set(CMAKE_C_LINKER clang)
set(CMAKE_C_LINK_EXECUTABLE
    "${CMAKE_C_LINKER} ${MY_LINK_FLAGS} <FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
set(CMAKE_CXX_LINK_EXECUTABLE
    "${CMAKE_CXX_LINKER} ${MY_LINK_FLAGS} <FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
#指定链接库的查找路径。
set(CMAKE_SYSROOT ${OHOS_SYSROOT_PATH})

mkdir build && cd build
cmake .. -DBUILD_TESTING=ON -DOHOS_SYSROOT_PATH="..."
make -j

cd nfs
./cctest --list

test-bignum/Assign<
test-bignum/ShiftLeft<
test-bignum/AddUInt64<
test-bignum/AddBignum<
test-bignum/SubtractBignum<
test-bignum/MultiplyUInt32<
test-bignum/MultiplyUInt64<
test-bignum/MultiplyPowerOfTen<
test-bignum/DivideModuloIntBignum<
test-bignum/Compare<
test-bignum/PlusCompare<
test-bignum/Square<
test-bignum/AssignPowerUInt16<
test-bignum-dtoa/BignumDtoaVariousDoubles<
test-bignum-dtoa/BignumDtoaShortestVariousFloats<
test-bignum-dtoa/BignumDtoaGayShortest<
test-bignum-dtoa/BignumDtoaGayShortestSingle<
test-bignum-dtoa/BignumDtoaGayFixed<
test-bignum-dtoa/BignumDtoaGayPrecision<
test-conversions/DoubleToShortest<
test-conversions/DoubleToShortestSingle<
...

./cctest test-bignum

Ran 13 tests.

import("config.gni")
group("double-conversion") {
    if (ohos_build_thirdparty_migrated_from_fuchisa == true) {
        deps = [":make"]
    }
}
if (ohos_build_thirdparty_migrated_from_fuchisa == true) {
    action("make") {
        script = "//third_party/double-conversion/build_thirdparty.py"
        outputs = ["$root_out_dir/log_dc.txt"]
        exec_path = rebase_path(rebase_path("./build", ohos_third_party_dir))
        command = "rm * .* -rf && $CMAKE_TOOLS_PATH/cmake .. $CMAKE_FLAG $CMAKE_TOOLCHAIN_FLAG && make -j"
        args = [
            "--path=$exec_path",
            "--command=${command}"
        ]
    }
}

#CMAKE_FLAG: config compile feature
CMAKE_FLAG = "-DBUILD_TESTING=ON -DCMAKE_CXX_STANDARD=11"

#toolchain：follow up-layer，depend on $ohos_build_compiler
if (ohos_build_compiler == "clang") {
    CMAKE_TOOLCHAIN_FLAG = "-DOHOS_SYSROOT_PATH=${root_out_dir}sysroot"
} else {
    CMAKE_TOOLCHAIN_FLAG = ""
}

#CMake tools path,no need setting if this path already joined to $PATH.
CMAKE_TOOLS_PATH = "setting CMake tools path..."

import os
import sys
from subprocess import Popen
import argparse
import shlex

def cmd_exec(command):
    cmd = shlex.split(command)
    proc = Popen(cmd)
    proc.wait()
    ret_code = proc.returncode
    if ret_code != 0:
        raise Exception("{} failed, return code is {}".format(cmd, ret_code))

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--path', help='Build path.')
    parser.add_argument('--command', help='Build command.')
    parser.add_argument('--enable', help='enable python.', nargs='*')
    args = parser.parse_args()

    if args.enable:
        if args.enable[0] == 'false':
          return

    if args.path:
        curr_dir = os.getcwd()
        os.chdir(args.path)
        if args.command:
            if '&&' in args.command:
                command = args.command.split('&&')
                for data in command:
                  cmd_exec(data)
          else:
              cmd_exec(args.command)
      os.chdir(curr_dir)

 if __name__ == '__main__':
    sys.exit(main())

declare_args() {
    ohos_build_thirdparty_migrated_from_fuchisa = true
 }

hb build -T //third_party/double-conversion:double-conversion

#设置交叉编译工具链，确保工具链所在路径已经添加到了PATH环境变量中
CC:=clang
AR:=llvm-ar
#cflags中必须要添加--target及--sysroot选项
CFLAGS:=-Wall -Wextra -Wno-unused-parameter -O2 -g --target=arm-liteos -march=armv7-a -mfloat-abi=softfp -mcpu=cortex-a7 -mfpu=neon-vfpv4 --sysroot=$(OHOS_SYSROOT_PATH)

CC:=gcc
AR:=ar
CFLAGS:=-Wall -Wextra -Wno-unused-parameter -O2 -g

make test OHOS_SYSROOT_PATH=...

#!/bin/sh
for i in *.xml; do
  b=`basename $i .xml`
  o=${b}.out
  t=${b}.test
  ./test <$i >$t
  if [ -n "`diff -q $o $t`" ]; then
    echo "Test failed for $i:"
    diff -u $o $t
    exit 1
  fi
done
echo "All tests completed successfully."

./test

<?SomePI abc?><a/>

pistart SomePI
picontent abc
piend
elemstart a
elemend
ok

import("config.gni")
group("yxml") {
    if (ohos_build_thirdparty_migrated_from_fuchisa == true) {
        deps = [":make"]
    }
}
if (ohos_build_thirdparty_migrated_from_fuchisa == true) {
    action("make") {
        script = "//third_party/yxml/build_thirdparty.py"
        outputs = ["$target_out_dir/log_yxml.txt"]
        exec_path = rebase_path(rebase_path("./yxml", root_build_dir))
        command = "make clean && $MAKE_COMMAND"
        args = [
            "--path=$exec_path",
            "--command=${command}"
        ]
    }
}

TEST_ENABLE = "YES"

if (TEST_ENABLE == "YES") {
    MAKE_COMMAND = "make test OHOS_SYSROOT_PATH=${root_out_dir}sysroot/"
} else {
    MAKE_COMMAND = "make OHOS_SYSROOT_PATH=${root_out_dir}sysroot/"
}