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

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上实现让lua脚本调c语言：

1.写一个jiaohu.c文件:

#include <math.h>

#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了

然后执行一下 >lua test.lua

显示 >1 1 22

成功实现在arm linux上实现让lua脚本调c语言了

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 <stdio.h>

#include <lua.h>

#include <lualib.h>

#include <lauxlib.h>

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 和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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