_lua_close 在我的 Mac 上未定义符号

我有源代码文件

#include <lua.h>
#include <lauxlib.h>
#include <stdlib.h>
#include <stdio.h>

#define BUFSIZE 1024

int main() {
  char line[BUFSIZE];

  lua_State *L = lua_open();
  while (fgets(line, sizeof(line), stdin) != 0) {
    lua_dostring(L, line);
  }
  lua_close(L);
  exit(0);
}

然后我运行了 gcc luac.c，得到了一个错误。

Undefined symbols for architecture x86_64:
  "_lua_close", referenced from:
      _main in luac-9bbdf6.o
  "_lua_dostring", referenced from:
      _main in luac-9bbdf6.o
  "_lua_open", referenced from:
      _main in luac-9bbdf6.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

似乎我的 /usr/local/include 文件夹中没有 lua.h。但它是有的。

ls -al /usr/local/include/lua.h
-rw-r--r--@ 1 root  admin    11K Apr  3 16:23 /usr/local/include/lua.h

而且我有

ls -al /usr/local/lib/liblua.a
-rw-r--r--  1 root  admin  150448 Apr  3 16:23 /usr/local/lib/liblua.a

gcc 的搜索路径

gcc -Xlinker -v
(#)PROGRAM:ld  PROJECT:ld64-305
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em (tvOS)
Library search paths:
    /usr/lib
    /usr/local/lib
Framework search paths:
    /Library/Frameworks/
    /System/Library/Frameworks/
...

为什么 gcc 报错，请告诉我。

更新：

问题是 gcc 默认没有添加 lua lib？

我使用 gcc luac.c -llua -llualib，奏效了。