done

Makefile

@@ -0,0 +1,6 @@
+so/testlib.so: src/module.c
+	gcc -O2 -shared -fpic -I /usr/include/luajit-2.1 -o so/clib.so src/module.c
+
+PHONY: run
+run:
+	/usr/local/openresty/bin/openresty -p .

conf/nginx.conf

@@ -9,15 +9,19 @@ events {
 
 http {
     access_log /dev/stdout;
-
     lua_package_path "$prefix/lua/?.lua;;";
+    lua_package_cpath '$prefix/so/?.so;;';
+
     server {
         listen 80;
         location / {
             default_type text/plain;
             content_by_lua_block {
-                local key_header = require "key_header"
-                key_header.greet("a Lua module")
+                local clib = require("clib")
+                local llib = require("llib")
+
+                ngx.say( clib.func("Hello from") )
+                ngx.say( llib.func("Hello from") )
             }
         }
     }

lua/key_header.lua

@@ -1,5 +0,0 @@
-local _M = {}
-function _M.greet(name)
-    ngx.say("Greetings from ", name)
-end
-return _M

lua/llib.lua

@@ -0,0 +1,6 @@
+local _M = {}
+
+function _M.func(str)
+    ngx.say(str, " lua function")
+end
+return _M

src/module.c

@@ -0,0 +1,19 @@
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+
+static int func(lua_State *L) {
+    const char *arg = luaL_checkstring(L, 1); // pop argument
+    lua_pushfstring(L, "%s C func!", arg);    // push result
+    return 1;                                 // number of results
+}
+
+static const struct luaL_Reg funcs[2] = {
+    {"func", func},
+    {NULL, NULL}
+};
+
+int luaopen_clib(lua_State *L) {
+    luaL_newlib(L, funcs);
+    return 1;
+}