From 896eee8b1f76fc1622dbef020a364bae6addbdd2 Mon Sep 17 00:00:00 2001
From: Uli Schlachter <psychon@users.noreply.github.com>
Date: Sat, 9 Jul 2016 19:05:44 +0200
Subject: [PATCH] Print LuaJIT version in --version (#996)

When called with "--version", awesome prints the Lua version that it was
compiled against and the one that it is running against. This commit makes the
code detect LuaJIT and makes it print the LuaJIT version instead of an
unspecific "Lua 5.1".

Signed-off-by: Uli Schlachter <psychon@znc.in>
---
 common/version.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/common/version.c b/common/version.c
index fbd970e6..f5fbea5d 100644
--- a/common/version.c
+++ b/common/version.c
@@ -36,8 +36,14 @@ void
 eprint_version(void)
 {
     lua_State *L = luaL_newstate();
-    luaopen_base(L);
+    luaL_openlibs(L);
     lua_getglobal(L, "_VERSION");
+    lua_getglobal(L, "jit");
+
+    if (lua_istable(L, 2))
+        lua_getfield(L, 2, "version");
+    else
+        lua_pop(L, 1);
 
 #ifdef WITH_DBUS
     const char *has_dbus = "✔";