Update build-ohos.sh and README.md for compiling OHOS with OpenHarmony build project (#189)

Author: foreveruzi

.gitignore

@@ -5,6 +5,7 @@ compile_commands.json
 libsimple.*
 build/
 build-ios/
+build-ohos/
 *.gch
 bin/
 output/
@@ -20,4 +21,4 @@ examples/go/libsimple-osx-x64/
 cmake-build-debug/
 
 
-.vscode/
+.vscode/

README.md

@@ -83,6 +83,19 @@ make install
 ./build-ios.sh
 ```
 
+支持 ohos 编译：
+
+从 [官方发布渠道](https://gitcode.com/openharmony/docs/blob/master/en/release-notes/OpenHarmony-v5.0.1-release.md#acquiring-source-code-from-mirrors)下载适用于目标平台的SDK.
+```
+tar -zxvf ohos-sdk.tar.gz
+cd $OHOS_SDK/Linux
+for i in *.zip;do unzip ${i};done
+```
+开始编译
+```
+./build-ohos.sh
+```
+
 ### 代码
 - `src/entry` 入口文件，注册 sqlite tokenizer 和函数
 - `src/simple_tokenizer` 分词器实现

build-ohos.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+current_dir=$(pwd)/$(dirname "$0")
+build_dir="${current_dir}/build-ohos"
+lib_prefix="${current_dir}/output" 
+CMAKE="${OHOS_SDK}/native/build-tools/cmake/bin/cmake"
+TOOLCHAIN_FILE="${OHOS_SDK}/native/build/cmake/ohos.toolchain.cmake"
+OHOS_ARCH="arm64-v8a"
+
+mkdir -p "$build_dir" && cd "$build_dir" || exit
+
+"$CMAKE" \
+  -DCMAKE_TOOLCHAIN_FILE="$TOOLCHAIN_FILE" \
+  -DCMAKE_INSTALL_PREFIX="$lib_prefix" \
+  -DOHOS_ARCH="$OHOS_ARCH" \
+  -DCMAKE_CXX_FLAGS="-Wno-unused-command-line-argument" \
+  -DCMAKE_C_FLAGS="-Wno-unused-command-line-argument" \
+  "$current_dir"
+
+make
+make install