From f457e317400f616008fd4c7a772e8f5d4e33946e Mon Sep 17 00:00:00 2001
From: Enrico Lumetti <enrico.lumetti@gmail.com>
Date: Thu, 12 May 2022 11:03:04 +0200
Subject: [PATCH] Add hello world C lib

---
 .gitignore          |  1 +
 lunaclib/build.sh   |  4 ++++
 lunaclib/lunaclib.c | 19 +++++++++++++++++++
 3 files changed, 24 insertions(+)
 create mode 100755 lunaclib/build.sh
 create mode 100644 lunaclib/lunaclib.c

diff --git a/.gitignore b/.gitignore
index 07b0e87..cf7570c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.luo
+lunaclib/lunaclib.so
diff --git a/lunaclib/build.sh b/lunaclib/build.sh
new file mode 100755
index 0000000..3581863
--- /dev/null
+++ b/lunaclib/build.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cc -shared $(pkg-config --cflags luajit) lunaclib.c $(pkg-config --libs luajit) -o lunaclib.so
+
diff --git a/lunaclib/lunaclib.c b/lunaclib/lunaclib.c
new file mode 100644
index 0000000..3426d77
--- /dev/null
+++ b/lunaclib/lunaclib.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <lua.h>
+#include <lauxlib.h>
+
+static int hello(lua_State* L) {
+    puts("Hello World!");
+    return 0;
+}
+
+static const struct luaL_Reg lib[] = {
+    {"hello", hello},
+    {NULL, NULL}
+};
+
+int luaopen_lib (lua_State *L) {
+    luaL_openlib(L, "lunaclib", lib, 0);
+    return 1;
+}
+