Linux下Lua扩展so

#include
#include
#include
#include
#include
 
#include
#include
#include
#include
 


#include
#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;
}

如果是.cpp文件，在luaopen_mylib一定要加 extern "C", 否则导出的函数会被重命名，切记切记

编译：gcc mylibs.c -fPIC -shared -o libmylib.so -llua

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

lua调用脚本：

local one, two, three = package.loadlib("libmylib.so", "luaopen_mylib")()

print(mylib.lsin(10))