diff --git a/BUILD.gn b/BUILD.gn
new file mode 100755
index 0000000000000000000000000000000000000000..fe965331d59c9f468796fe01c5228a5374e76db9
--- /dev/null
+++ b/BUILD.gn
@@ -0,0 +1,166 @@
+# Copyright (c) Huawei Technologies Co., Ltd. 2021. All rights reserved.
+
+import("//build/config/sysroot.gni")
+import("//build/ohos.gni")
+
+config("ninja_config") {
+  visibility = [ ":*" ]
+
+  include_dirs = [ "//third_party/ninja/src" ]
+
+  deps = []
+  defines = []
+  if (use_musl) {
+    deps += [
+      "//third_party/musl:musl_headers",
+      "//third_party/musl:musl_libs",
+    ]
+    include_dirs += [ "//third_party/musl/include" ]
+    defines += [ "NINJA_USE_MUSL" ]
+  }
+
+  cflags = [ "-Wno-deprecated" ]
+
+  cflags_cc = [ "-Wno-deprecated" ]
+}
+
+ohos_source_set("ninja_re2c_library_source") {
+  sources = [
+    "src/depfile_parser.cc",
+    "src/lexer.cc",
+  ]
+
+  configs = [ ":ninja_config" ]
+}
+
+ohos_source_set("ninja_library_source") {
+  sources = [
+    "src/build.cc",
+    "src/build_log.cc",
+    "src/clean.cc",
+    "src/clparser.cc",
+    "src/debug_flags.cc",
+    "src/deps_log.cc",
+    "src/disk_interface.cc",
+    "src/dyndep.cc",
+    "src/dyndep_parser.cc",
+    "src/edit_distance.cc",
+    "src/eval_env.cc",
+    "src/graph.cc",
+    "src/graphviz.cc",
+    "src/line_printer.cc",
+    "src/manifest_parser.cc",
+    "src/metrics.cc",
+    "src/parser.cc",
+    "src/state.cc",
+    "src/string_piece_util.cc",
+    "src/subprocess-posix.cc",
+    "src/util.cc",
+    "src/version.cc",
+  ]
+
+  configs = [ ":ninja_config" ]
+}
+
+ohos_executable("ninja") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [ "src/ninja.cc" ]
+}
+
+ohos_executable("clparser_perftest") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [ "src/clparser_perftest.cc" ]
+}
+
+ohos_executable("build_log_perftest") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [ "src/build_log_perftest.cc" ]
+}
+
+ohos_executable("canon_perftest") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [ "src/canon_perftest.cc" ]
+}
+
+ohos_executable("ninja_test") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [
+    "src/build_log_test.cc",
+    "src/build_test.cc",
+    "src/clean_test.cc",
+    "src/clparser_test.cc",
+    "src/depfile_parser_test.cc",
+    "src/deps_log_test.cc",
+    "src/disk_interface_test.cc",
+    "src/dyndep_parser_test.cc",
+    "src/edit_distance_test.cc",
+    "src/graph_test.cc",
+    "src/lexer_test.cc",
+    "src/manifest_parser_test.cc",
+    "src/ninja_test.cc",
+    "src/state_test.cc",
+    "src/string_piece_util_test.cc",
+    "src/subprocess_test.cc",
+    "src/test.cc",
+    "src/util_test.cc",
+  ]
+}
+
+ohos_executable("depfile_parser_perftest") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [ "src/depfile_parser_perftest.cc" ]
+}
+
+ohos_executable("hash_collision_bench") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [ "src/hash_collision_bench.cc" ]
+}
+
+ohos_executable("manifest_parser_perftest") {
+  deps = [
+    ":ninja_library_source",
+    ":ninja_re2c_library_source",
+  ]
+  configs = [ ":ninja_config" ]
+  sources = [ "src/manifest_parser_perftest.cc" ]
+}
+
+group("ninja_tests") {
+  deps = [
+    ":build_log_perftest",
+    ":canon_perftest",
+    ":clparser_perftest",
+    ":depfile_parser_perftest",
+    ":hash_collision_bench",
+    ":manifest_parser_perftest",
+    ":ninja_test",
+  ]
+}
diff --git a/src/getopt.h b/src/getopt.h
old mode 100644
new mode 100755
index 965dc29003c153658d9713333d0d37b05d3647e8..1728ba51c24da4ae44de96d0905fa037804914a6
--- a/src/getopt.h
+++ b/src/getopt.h
@@ -39,7 +39,8 @@ extern "C"
   extern int optopt;
 
   /* function prototypes */
-#ifndef _AIX
+  /* Modified By Wang Hong(kuletco@qq.com), cause of <getopt> redefined with musl */
+#if !defined (_AIX) && !defined (NINJA_USE_MUSL)
   int getopt (int argc, char **argv, char *optstring);
 #endif
   int getopt_long (int argc, char **argv, const char *shortopts,