在Windows上使用gcc 5.3.0编译Lua 5.2.4模块 [英] Compile Lua 5.2.4 Module with gcc 5.3.0 on Windows

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问题描述

我需要用gcc 5.3.0编译一个Lua 5.2.4模块。在这之前,我通过以下步骤构建了Lua 5.2.4:

<$ p $

p> gcc -c -DLUA_BUILD_AS_DLL * .c
ren lua.o lua.obj
ren luac.o luac.obj
ar rcs lua524-static.lib * .o
gcc -shared -o lua524.dll -Wl, - out-implib,lua524.lib * .o
gcc lua.obj lua524.lib -o lua524.exe
gcc luac.obj lua524-static.lib -o luac524.exe
del * .o * .obj

我想创建的动态库(.dll)写在下面(我们称之为LuaMath):

 #包括< windows.h> 
#include< math.h>
#includelauxlib.h
#includelua.h

static int IdentityMatrix (lua_State * L)
{
int in = lua_gettop(L);
if(in!= 1)
{
lua_pushstring(L,Maximum 1 argument );
lua_error(L);
}
lua_Number n = lua_tonumber(L,1);
lua_newtable(L); / * tabOUT n * /
int i,j;
for(i = 1; i <= n; i ++)
{
lua_newtable(L); / * row(i)tabOUT n * /
lua_pushnumber(L,i);对于(j = 1; j <= n; j ++)
{
lua_pushnumber(L,j); / * i行(i)tabOUT n * /
; / * j i row(i)tabOUT n * /
if(j == i)
{
lua_pushnumber(L,1);
}
else / * 0/1 j i row(i)tabOUT n * /
{
lua_pushnumber(L,0);
}
/ *将0/1放入
行(i)中的j
位置* /
lua_settable(L,-4); / * i行(i)tabOUT n * /
}
lua_insert(L,-2);将行(i)插入到tabOUT中的
位置* /
lua_settable(L,2); / *行(i)我tabOUT n * /

/ / * tabOUT n * /
}
return 1;



static const struct luaL_Reg LuaMath [] = {{IdentityMatrix,IdentityMatrix},
{NULL,NULL}};

LUA_API int luaopen_LuaMath(lua_State * L)
{
luaL_newlib(L,LuaMath);
返回1;
}

正如这里,我建立上面的代码如下:

  gcc -O2 -c -DLUA_BUILD_AS_DLL -o LuaMath.o LuaMath.c 
gcc -O -shared -o LuaMath.dll LuaMath.o -L。 -llua524

当我运行以下Lua代码时:

  require(LuaMath)
A = LuaMath.IdentityMatrix(2)

输出错误是:

  stdin:1:尝试索引全局'LuaMath' (无值)
栈回溯:
stdin:1:在主块
[C]:in?

我做错了什么?

在此先感谢

解决方案

您的C代码是正确的。通常的Lua习语是

  LuaMath = require(LuaMath)


$ b

如果你想把你的库加载到一个全局变量中。

如果你想要一个局部变量,使用

  local LuaMath = require(LuaMath)


I need to compile a Lua 5.2.4 module with gcc 5.3.0. on Windows.

Before doing that, I build the Lua 5.2.4 in the following steps:

gcc -c -DLUA_BUILD_AS_DLL *.c
ren lua.o lua.obj
ren luac.o luac.obj
ar rcs lua524-static.lib  *.o
gcc -shared -o lua524.dll -Wl,--out-implib,lua524.lib *.o
gcc lua.obj lua524.lib -o lua524.exe
gcc luac.obj lua524-static.lib -o luac524.exe
del *.o *.obj

The dynamic library (.dll) I want to create is written in the following (let's call it LuaMath:

#include<windows.h>
#include<math.h>
#include "lauxlib.h"
#include "lua.h"

static int IdentityMatrix(lua_State *L)
{
    int in = lua_gettop(L);
    if (in!=1)
    {
       lua_pushstring(L,"Maximum 1 argument");
       lua_error(L);
    }
    lua_Number n = lua_tonumber(L,1);
    lua_newtable(L);                  /*                 tabOUT n */
    int i,j;
    for (i=1;i<=n;i++)
    {
        lua_newtable(L);              /*         row(i) tabOUT n */
        lua_pushnumber(L,i);          /*       i row(i) tabOUT n */
        for (j=1;j<=n;j++)
        {
            lua_pushnumber(L,j);      /*     j i row(i) tabOUT n */
            if (j==i)
            {
                lua_pushnumber(L,1);
            }
            else                      /* 0/1 j i row(i) tabOUT n */
            {
                lua_pushnumber(L,0);
            }
            /*  Put 0/1 inside
                row(i) at j
                position */
            lua_settable(L,-4);       /*       i row(i) tabOUT n */
        }
        lua_insert(L,-2);             /*       row(i) i tabOUT n */

        /* Insert row(i) into
           position in tabOUT */
        lua_settable(L,2);            /*                tabOUT n */
    }
    return 1;
}


static const struct luaL_Reg LuaMath [] = {{"IdentityMatrix", IdentityMatrix},
                                           {            NULL,           NULL}};

LUA_API int luaopen_LuaMath(lua_State *L)
{
    luaL_newlib(L,LuaMath);
    return 1;
}

As stated here, I build the above code as follow:

gcc -O2 -c -DLUA_BUILD_AS_DLL -o LuaMath.o LuaMath.c
gcc -O -shared -o LuaMath.dll LuaMath.o -L. -llua524

when I run the following Lua code:

require("LuaMath")
A=LuaMath.IdentityMatrix(2)

the output error is:

stdin:1: attempt to index global 'LuaMath' (a nil value)
stack traceback:
        stdin:1: in main chunk
        [C]: in ?

What do I do wrong?

Thanks in advance

解决方案

Your C code is correct. The usual Lua idiom is

LuaMath=require("LuaMath")

if you want to load your library into a global variable.

If you want a local variable, use

local LuaMath=require("LuaMath")

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