Linux下编写Lua扩展so文件和调用方法实例

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
 
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <limits.h>
 

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

/*  库 open 函数的前置声明   */
int luaopen_mylib(lua_state *l);

static int l_sin (lua_state *l)
{
double d = lual_checknumber(l, 1);
lua_pushnumber(l, sin(d));
//printf("ok now is  luahook!\n");
return 1; /* number of results */
}

static const lual_reg mylib[] =
{
{"lsin", l_sin},
{null, null} /* 必须以null结尾 */
};

 int luaopen_mylib(lua_state *l)
{
  luai_openlib(l, "mylib", mylib, 0);
return 1;
}

makefile文件
cxx =gcc
libname:=libmylib.so
hdrname:=mylibs.c
targetname:=mylibs
cname:=$(patsubst %,%.c,$(targetname))
oname:=$(patsubst %,%.o,$(targetname))
all:libmylib
libmylib: $(oname)
$(cxx) -g -shared -wl,$(libname) \
-o $(libname) $(oname) -llua
%.o: %.c
$(cxx) -fpic -c -wall $(cname)clean:$(rm) *.o *.so

local one, two, three = package.loadlib("libmylib.so", "luaopen_mylib")()
print(mylib.lsin(10))