Lua移植到arm上 并实现在arm上 可以让lua脚本调c语言,C语言调用lua脚本

 Lua移植到arm上 并实现在arm 可以让lua脚本调c语言,C语言调用lua脚本

首先参考http://wiki.chumby.com/index.php?title=Lua&printable=yes上的做法,修改lua-5.1.4.tar.gz. 上的Makefile,编译过后会在/src目录下生成可以在arm-linux上可以运行的lua解析器和luac编译器。我们在arm-linux下运行lua脚本,只需要用到lua解析器就ok了,所以,我们把lua cp到我们开发板linux系统上的 /bin目录下就ok了。这样,在开发板上的linux系统就可以自动地找到lua并使用它了。

Lua

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Lua is a lightweight scripting language - see the Lua website

Building lua

· download and unpack the lua source distribution lua-5.1.4.tar.gz.

· edit src/Makefile 

o line 10 

CC=arm-linux-gcc

o line 12 

AR=arm-linux-ar

o line 13 

RANLIB=arm-linux-ranlib

o line 15 

LIBS= -lm $(MYLIBS) -static

o line 99, remove -lreadline -lhistory -lncurses  //这里可能行数有点偏差

  把这行的内容$(MAKE) all MYCFLAGS=-DLUA_USE_LINUX MYLIBS="-Wl,-E -ldl -lreadline -lhistory -lncurses"

    改成    $(MAKE) all MYCFLAGS=-DLUA_USE_LINUX MYLIBS="-Wl,-E -ldl "

 

· edit src/luaconf.h, comment out line 39 (disable LUA_USE_READLINE)

· do:

 make linux

 arm-linux-strip src/lua

 

 

 

接下来,我们看看如何实现在arm linux上实现lua脚本调c语言:

 

1.写一个jiaohu.c文件:

 

#include 

#include "lua.h"

#include "lualib.h"

#include "lauxlib.h"

 

 

static int my_foo(lua_State* L)

{

       int n = lua_gettop(L);

       int isnum = lua_isnumber(L, 1);

       int m = lua_tonumber(L, 1);

       printf("%d %d %d\n", n, isnum, m);

       lua_pushnumber(L,m);

       lua_pushstring(L,"foo ret string\n");

       return 2;

}

 

LUALIB_API  int my_init(lua_State* L)

{

       lua_register(L, "foo", my_foo);

       return 0;

}

 

用 arm-linux-gcc -I/root/lua-5.1.4/src/  -L/root/lua-5.1.4/src/  -shared -fPIC jiaohu.c -o jiaohu.so编译,这样就把可以加到lua上的动态库编译好了。

 

再写一个lua的调用脚本 test.lua

 

package.loadlib("./jiaohu.so", "my_init")()

a ,b=foo(22,33)

 

接下来就是把jiahu.so 和 test.lua放到arm linux的某个测试用的临时目录下就ok

然后执行 一下 >lua test.lua

显示          >1 1 22

成功实现在arm linux上实现lua脚本调c语言

 

现在该来看看如何实现在arm linux下如何实现 C调用lua脚本了

先建立一个 test.c文件:

#include    

#include   

#include   

#include   

  

lua_State* L;  

int main ( int argc, char *argv[] ){  

L = luaL_newstate();  

   luaL_openlibs(L);  

//   luaL_dofile(L, "test.lua");  

  luaL_loadfile(L, "./test.lua");

  int iError = lua_pcall(L, 0, 0, 0);  

    if (iError)  

    {  

 printf("error %d \n",iError);

        lua_close(L);  

        return 1;  

    }  

    int a = 11 ;  

    int b = 12 ;  

    lua_getglobal(L,"sum");               

    lua_pushinteger(L,a) ;  

    lua_pushinteger(L,b) ;  

    int ret = lua_pcall(L,2,1,0) ;  

    if ( ret != 0 )  

     {

 printf("error\n");

 return 1;  

     }

  printf("sum:%d + %d = %ld\n",a,b,lua_tointeger(L,-1)) ;  

    lua_pop(L,1);  

    /* 清除Lua */  

  lua_close(L);  

  return 0;  

 } 

 

再建立一个test.lua文件

width=1 ;

height=2 ;

function sum(a,b)

    return a+b ;

End

 

用一下命令来编译test.c文件

#arm-linux-gcc -I/root/lua_tool/lua-5.1.4-armlinux/src/  -L/root/lua_tool/lua-5.1.4-armlinux/src/ -lm -DLUA_USE_READLINE test.c /root/lua_tool/lua-5.1.4-armlinux/src/liblua.a -o test2 -ldl

 

把生成的test2 test.lua文件拷到arm linux上运行:

#Lua  test2

就会显示#sum:11 + 12 = 23

 

 

 

参考文章:

http://hi.baidu.com/hqwfreefly/blog/item/5724afef3b6018dab31cb1d1.html

http://hi.baidu.com/mikenoodle/blog/item/5fd129dd1069a9de8c102948.html

http://wenku.baidu.com/view/0d557b0416fc700abb68fc73.html

http://www.extgui.com/?p=157



 

lua编译问题总结

gcc -lm  -g -o test test.c /usr/local/lib/liblua.a -ldl


如果少-ldl,那么编译就会报:

gcc -lm  -g -o test test.c /usr/local/lib/liblua.a  

/usr/local/lib/liblua.a(loadlib.o): In function `gctm':
loadlib.c:(.text+0x35): undefined reference to `dlclose'
/usr/local/lib/liblua.a(loadlib.o): In function `ll_loadfunc':
loadlib.c:(.text+0xc0): undefined reference to `dlopen'
loadlib.c:(.text+0xfc): undefined reference to `dlsym'
loadlib.c:(.text+0x198): undefined reference to `dlerror'
loadlib.c:(.text+0x1bb): undefined reference to `dlerror'



如果少liblua.a ,就会报如下问题:

[wangbin@tuan lua]$ gcc -lm  -g -o test test.c  -ldl                       
/tmp/ccCT0d24.o: In function `main':
/home/wangbin/work/tmp/lua/test.c:26: undefined reference to `luaL_newstate'
/home/wangbin/work/tmp/lua/test.c:27: undefined reference to `luaL_openlibs'
/home/wangbin/work/tmp/lua/test.c:29: undefined reference to `luaL_loadbufferx'
/home/wangbin/work/tmp/lua/test.c:29: undefined reference to `lua_pcallk'
/home/wangbin/work/tmp/lua/test.c:32: undefined reference to `lua_tolstring'
/home/wangbin/work/tmp/lua/test.c:33: undefined reference to `lua_settop'
/home/wangbin/work/tmp/lua/test.c:36: undefined reference to `lua_close'
collect2: ld returned 1 exit status


如果少-lm,那么编译结果如下:

[wangbin@tuan lua]$ gcc -g -o test test.c /usr/local/lib/liblua.a -ldl 
/usr/local/lib/liblua.a(lobject.o): In function `luaO_arith':
lobject.c:(.text+0xdf): undefined reference to `pow'
/usr/local/lib/liblua.a(lvm.o): In function `luaV_execute':
lvm.c:(.text+0x159a): undefined reference to `pow'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_sin':
lmathlib.c:(.text+0x3e): undefined reference to `sin'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_sinh':
lmathlib.c:(.text+0x6e): undefined reference to `sinh'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_cos':
lmathlib.c:(.text+0x9e): undefined reference to `cos'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_cosh':
lmathlib.c:(.text+0xce): undefined reference to `cosh'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_tan':
lmathlib.c:(.text+0xfe): undefined reference to `tan'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_tanh':
lmathlib.c:(.text+0x12e): undefined reference to `tanh'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_asin':
lmathlib.c:(.text+0x15e): undefined reference to `asin'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_acos':
lmathlib.c:(.text+0x18e): undefined reference to `acos'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_atan':
lmathlib.c:(.text+0x1be): undefined reference to `atan'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_atan2':
lmathlib.c:(.text+0x1fb): undefined reference to `atan2'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_fmod':
lmathlib.c:(.text+0x2db): undefined reference to `fmod'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_sqrt':
lmathlib.c:(.text+0x391): undefined reference to `sqrt'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_pow':
lmathlib.c:(.text+0x3d3): undefined reference to `pow'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_log':
lmathlib.c:(.text+0x450): undefined reference to `log'
lmathlib.c:(.text+0x460): undefined reference to `log'
lmathlib.c:(.text+0x486): undefined reference to `log10'
lmathlib.c:(.text+0x4aa): undefined reference to `log'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_log10':
lmathlib.c:(.text+0x4de): undefined reference to `log10'
/usr/local/lib/liblua.a(lmathlib.o): In function `math_exp':
lmathlib.c:(.text+0x50e): undefined reference to `exp'
collect2: ld returned 1 exit status



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