在我的mac上_lua_close未定义的符号

Question

我有源文件

#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gcc luac.c，出错了。

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)

好像我的lua.h文件夹中没有/usr/local/include。但它有。

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

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说错误，你能告诉我吗。

更新

问题是gcc默认不添加lua lib？

我使用gcc luac.c -llua -llualib，有效。