diff --git a/README.md b/README.md
index df3d8b5..1bb405e 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 > `scc`
 
-这是一个简单的C语言编译器，可以从C99子集编程语言生成可执行代码。该语言支持基本操作，如算术运算、逻辑运算、条件语句（if/else）、循环语句（while/for）、分支语句（switch/case）、函数调用以及内联汇编调用（asm）。 
+这是一个简单的C语言裸机环境的自举编译器，可以从C99子集编程语言生成可执行代码。该语言支持基本操作，如算术运算、逻辑运算、条件语句(if/else)、循环语句(while/for)、分支语句(switch/case)、函数调用以及内联汇编调用(asm)。 
 
 ## Builder
 
diff --git a/justfile b/justfile
index 3d57fc0..e8fa9db 100644
--- a/justfile
+++ b/justfile
@@ -19,10 +19,10 @@ clean:
 	cbuild clean
 
 build:
-	cbuild build -cclang
+	cbuild build -cclang --dev
 
 build-install: build
-	cp ./build/dev/scc.exe ./scc.exe
+	cp ./build/dev/scc ./scc
 
 test-scc:
 	# windows: (Get-Content a.txt -Raw) -replace '\x1b\[[0-9;]*[a-zA-Z]', '' | Set-Content clean.txt
diff --git a/libs/ast/include/ast_def.h b/libs/ast/include/ast_def.h
index c51e14a..cb3bf78 100644
--- a/libs/ast/include/ast_def.h
+++ b/libs/ast/include/ast_def.h
@@ -8,6 +8,7 @@
  * @brief AST 节点类型枚举
  */
 typedef enum {
+    SCC_AST_UNKNOWN,
     // 声明
     scc_ast_decl_t_BEGIN, // 声明开始
     SCC_AST_DECL_VAR,     // 变量声明
diff --git a/libs/sstream/include/scc_pos_log.h b/libs/sstream/include/scc_pos_log.h
index fd9ae2c..ddaa514 100644
--- a/libs/sstream/include/scc_pos_log.h
+++ b/libs/sstream/include/scc_pos_log.h
@@ -10,7 +10,7 @@ extern logger_t __scc_usr_log;
     do {                                                                       \
         char _full_msg[LOGGER_MAX_BUF_SIZE];                                   \
         int _n = snprintf_(_full_msg, sizeof(_full_msg),                       \
-                           "%s:%lu:%lu: ", (pos).name, (pos).line, (pos).col); \
+                           "%s:%u:%u: ", (pos).name, (pos).line, (pos).col);   \
         snprintf_(_full_msg + _n, sizeof(_full_msg) - _n, fmt, ##__VA_ARGS__); \
         __scc_usr_log.handler(&__scc_usr_log, level, null, 0, null, "%s",      \
                               _full_msg);                                      \
diff --git a/runtime/scc_core/src/cfg.bale_metal.c b/runtime/scc_core/src/cfg.bale_metal.c
index e69de29..8b13789 100644
--- a/runtime/scc_core/src/cfg.bale_metal.c
+++ b/runtime/scc_core/src/cfg.bale_metal.c
@@ -0,0 +1 @@
+
diff --git a/src/main.c b/src/main.c
index 6994624..b633ceb 100644
--- a/src/main.c
+++ b/src/main.c
@@ -36,7 +36,8 @@ static void setup_argparse(scc_argparse_t *argparse, scc_config_t *config,
     static const char *scc_hints_en[] = {
         [SCC_HINT_PROG_NAME] = "scc",
         [SCC_HINT_DESCRIPTION] = "A simple C compiler",
-        [SCC_HINT_OUTPUT_FILE] = "Output file",
+        [SCC_HINT_OUTPUT_FILE] =
+            "Output file (`-` means standard output stream file)",
         [SCC_HINT_INPUT_FILE] = "Input source file",
         [SCC_HINT_INCLUDE_PATH] = "Add directory to the include search paths",
         [SCC_HINT_VERBOSE] = "Increase verbosity (can be used multiple times)",
@@ -48,7 +49,7 @@ static void setup_argparse(scc_argparse_t *argparse, scc_config_t *config,
     static const char *scc_hints_zh[] = {
         [SCC_HINT_PROG_NAME] = "scc",
         [SCC_HINT_DESCRIPTION] = "一个简单的C编译器",
-        [SCC_HINT_OUTPUT_FILE] = "输出文件",
+        [SCC_HINT_OUTPUT_FILE] = "输出文件(`-`表示标准输出流文件)",
         [SCC_HINT_INPUT_FILE] = "输入源文件",
         [SCC_HINT_INCLUDE_PATH] = "添加系统头文件到搜索路径",
         [SCC_HINT_VERBOSE] = "增加详细输出(可多次使用)",
@@ -147,10 +148,11 @@ static void print_ring(scc_lexer_tok_ring_t *ring, int verbose) {
         if (verbose == 0) {
             scc_printf("%s ", scc_get_tok_name(tok.type));
         } else if (verbose >= 1) {
-            scc_printf("token [%-8s] `%s` at %s:%d:%d\n",
-                       scc_get_tok_name(tok.type),
-                       scc_cstring_as_cstr(&tok.lexeme), tok.loc.name,
-                       tok.loc.line, tok.loc.col);
+            scc_printf(
+                "token [%-8s] `%s` at %s:%d:%d\n", scc_get_tok_name(tok.type),
+                tok.type != SCC_TOK_ENDLINE ? scc_cstring_as_cstr(&tok.lexeme)
+                                            : "\\n",
+                tok.loc.name, tok.loc.line, tok.loc.col);
         }
         scc_lexer_tok_drop(&tok);
     }
@@ -159,20 +161,28 @@ static void print_ring(scc_lexer_tok_ring_t *ring, int verbose) {
 static void print_file(scc_lexer_tok_ring_t *ring, const char *file_name) {
     scc_lexer_tok_t tok = {0};
     int ret = 0;
-    scc_file_t fp = scc_fopen(file_name, SCC_FILE_WRITE);
-    if (fp == null) {
-        LOG_FATAL("Failed to open file %s", file_name);
-        return;
+    scc_file_t fp = null;
+    cbool is_stdout = scc_strcmp(file_name, "-") == 0;
+    if (!is_stdout) {
+        fp = scc_fopen(file_name, SCC_FILE_WRITE);
+        if (fp == null) {
+            LOG_FATAL("Failed to open file %s", file_name);
+            return;
+        }
     }
     while (1) {
         scc_ring_next_consume(*ring, tok, ret);
         if (ret == false || tok.type == SCC_TOK_EOF) {
             break;
         }
-        usize ret = scc_fwrite(fp, scc_cstring_as_cstr(&tok.lexeme),
-                               scc_cstring_len(&tok.lexeme));
-        if (ret != scc_cstring_len(&tok.lexeme)) {
-            LOG_FATAL("Failed to write to file %s", file_name);
+        if (is_stdout) {
+            scc_printf("%s", scc_cstring_as_cstr(&tok.lexeme));
+        } else {
+            usize ret = scc_fwrite(fp, scc_cstring_as_cstr(&tok.lexeme),
+                                   scc_cstring_len(&tok.lexeme));
+            if (ret != scc_cstring_len(&tok.lexeme)) {
+                LOG_FATAL("Failed to write to file %s", file_name);
+            }
         }
         scc_lexer_tok_drop(&tok);
     }
@@ -190,6 +200,13 @@ int main(int argc, const char **argv, const char **envp) {
 #else
 #define OUTPUT_DEFAULT_FILE "a.out"
 #endif
+    scc_argparse_lang_t argparse_lang = SCC_ARGPARSE_LANG_EN;
+    for (const char **env = envp; *env != null; env++) {
+        const char *env_str = *env;
+        if (scc_strcmp(env_str, "LANG=zh_CN.UTF-8") == 0) {
+            argparse_lang = SCC_ARGPARSE_LANG_ZH;
+        }
+    }
 
     scc_config_t config = {
         .input_file = null,
@@ -201,11 +218,11 @@ int main(int argc, const char **argv, const char **envp) {
     scc_vec_init(config.include_paths);
 
     scc_argparse_t argparse;
-    setup_argparse(&argparse, &config, SCC_ARGPARSE_LANG_ZH);
+    setup_argparse(&argparse, &config, argparse_lang);
     int ret = scc_argparse_parse(&argparse, argc, argv);
     if (ret != 0) {
         scc_argparse_drop(&argparse);
-        return ret;
+        return 0;
     }
     scc_argparse_drop(&argparse);
 
diff --git a/tests/simple/12_include.c b/tests/simple/12_include.c
new file mode 100644
index 0000000..667cde3
--- /dev/null
+++ b/tests/simple/12_include.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(void) {
+    printf("hello world");
+    return 0;
+}
\ No newline at end of file
diff --git a/tools/cbuild/cbuild.py b/tools/cbuild/cbuild.py
index 0a58573..43d06be 100644
--- a/tools/cbuild/cbuild.py
+++ b/tools/cbuild/cbuild.py
@@ -692,7 +692,15 @@ class SccCompiler(Compiler):
         self, source: Path, output: Path, includes: list[Path], flags: list[str]
     ):
         # cmd = ["clang"] + flags + ["-c", str(source), "-o", str(output)]
-        cmd = ["scc", "--emit-pp", "-o", str(output), str(source), "-I", "scc_libs"]
+        cmd = [
+            "scc",
+            "--emit-pp",
+            "-o",
+            str(output),
+            str(source),
+            "-I",
+            "scc_include",
+        ]
         for inc in includes:
             cmd += ["-I", f"{inc}"]
         self.run(cmd)