反反复复学lua N多次了，这次终于在C中调用lua成功了！一大进步啊！
记录下过程：
1、找到代码如下：
//
add.c
#include <stdio.h>
#include " lua.h "
#include " lualib.h "
#include " lauxlib.h "
/* the lua interpreter */
lua_State* L;
int
luaadd( int x, int y)
{
int sum;
/* the function name */
lua_getglobal(L, " add ");
/* the first argument */
lua_pushnumber(L, x);
/* the second argument */
lua_pushnumber(L, y);
/* call the function with 2 arguments, return 1 result. */
lua_call(L, 2, 1);
/* get the result. */
sum = ( int)lua_tonumber(L, - 1);
/* cleanup the return */
lua_pop(L, 1);
return sum;
}
int
main( int argc, char *argv[])
{
int sum;
/* initialize Lua */
L = lua_open();
/* load Lua base libraries */
luaL_openlibs(L);
/* load the script */
luaL_dofile(L, " add.lua ");
/* call the add function */
sum = luaadd( 10, 15);
/* print the result */
printf( " The sum is %d \n ",sum);
/* cleanup Lua */
lua_close(L);
return 0;
#include <stdio.h>
#include " lua.h "
#include " lualib.h "
#include " lauxlib.h "
/* the lua interpreter */
lua_State* L;
int
luaadd( int x, int y)
{
int sum;
/* the function name */
lua_getglobal(L, " add ");
/* the first argument */
lua_pushnumber(L, x);
/* the second argument */
lua_pushnumber(L, y);
/* call the function with 2 arguments, return 1 result. */
lua_call(L, 2, 1);
/* get the result. */
sum = ( int)lua_tonumber(L, - 1);
/* cleanup the return */
lua_pop(L, 1);
return sum;
}
int
main( int argc, char *argv[])
{
int sum;
/* initialize Lua */
L = lua_open();
/* load Lua base libraries */
luaL_openlibs(L);
/* load the script */
luaL_dofile(L, " add.lua ");
/* call the add function */
sum = luaadd( 10, 15);
/* print the result */
printf( " The sum is %d \n ",sum);
/* cleanup Lua */
lua_close(L);
return 0;
}
然后，lua.add的代码如下
--
add two numbers
function add(x,y)
return x + y
end
function add(x,y)
return x + y
end
然后，尝试编译：gcc -o add add.c
提示： fatal error: lua.h: No such file or directory
然后，locate lua.h，无果。。。
原来在ubuntu下lua的安装包，binary和dev是分开装的，找了一下，需要安装另外一个包liblua5.1-dev
唔，装好了还是需要用-I指定，所以先找下lua.h被放哪里的。
sudo updatedb
locate lua.h
显示的结果：
/home/zxluo/Documents/backup/Work/luascript/AndroLua/jni/lua/lua.h
/usr/include/lua5.1/lua.h
/usr/include/lua5.1/lua.hpp
/usr/src/linux-headers-3.2.0-23-generic/include/config/scsi/dh/alua.h
/usr/src/linux-headers-3.2.0-24-generic/include/config/scsi/dh/alua.h
所以，添加文件再次编译：gcc -o add add.c -I /usr/include/lua5.1/
出现提示：
/tmp/ccPtEQyI.o: In function `luaadd':
main.c:(.text+0x23): undefined reference to `lua_getfield'
main.c:(.text+0x37): undefined reference to `lua_pushnumber'
main.c:(.text+0x4b): undefined reference to `lua_pushnumber'
main.c:(.text+0x64): undefined reference to `lua_call'
main.c:(.text+0x78): undefined reference to `lua_tonumber'
main.c:(.text+0x93): undefined reference to `lua_settop'
/tmp/ccPtEQyI.o: In function `main':
main.c:(.text+0xac): undefined reference to `luaL_newstate'
main.c:(.text+0xc2): undefined reference to `luaL_openlibs'
main.c:(.text+0xd6): undefined reference to `luaL_loadfile'
main.c:(.text+0xf8): undefined reference to `lua_pcall'
main.c:(.text+0x133): undefined reference to `lua_close'
collect2: ld returned 1 exit status
那个啥，是没有把库link过来，gcc不知道要把这些函数ld到哪里去，继续找liblua：
locate liblua
打印结果：
/usr/lib/x86_64-linux-gnu/liblua5.1-c++.a
/usr/lib/x86_64-linux-gnu/liblua5.1-c++.so
/usr/lib/x86_64-linux-gnu/liblua5.1-c++.so.0
/usr/lib/x86_64-linux-gnu/liblua5.1-c++.so.0.0.0
/usr/lib/x86_64-linux-gnu/liblua5.1.a
/usr/lib/x86_64-linux-gnu/liblua5.1.so
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0.0.0
所以添加编译选项：gcc -o add main.c -I /usr/include/lua5.1 -llua5.1
哦也～这下没有错误了
你可以改动add.lua试试，比如在x+y后面再+10! 啊哈， what happened?
amazing script!