https://github.com/norman/hello-lua

hello_lua2

libnativefunc.c

#include <lua.h>
#include <lauxlib.h>
static int l_mult50(lua_State* L)
{
    double number = luaL_checknumber(L, 1);
    lua_pushnumber(L, number*50);
    return 1;
}
int luaopen_libnativefunc(lua_State* L)
{
    static const struct luaL_Reg nativeFuncLib [] =
    {
         {"mult50", l_mult50}, //Your function name, and the function reference after
         {NULL, NULL}
    };
    lua_register(L, "nativelib", nativeFuncLib);
    return 1;
}

lua2.lua

nativelib = require "libnativefunc"
print(nativelib.l_mult50(60))

Makefile

LUA_DIR=~/lua_test/lua-5.4.4/src
LUA_LIBDIR=~/lua_test/lua-5.4.4/src
LIBFLAG= -shared -fPIC  -Wall 
hello.so:	libnativefunc.c
	$(CC) -o libnativefunc.so $(LIBFLAG) $(CFLAGS) libnativefunc.c -I$(LUA_LIBDIR) -L$(LUA_LIBDIR)

clean:
	$(RM) libnativefunc.so

test: luapi.so
	shake test.lua

rock:
	luarocks make luapi-scm-1.rockspec

运行

~/lua_test/lua-5.4.4/src/lua lua1.lua