added extra include files search paths, see #403 (comment)

updated bak files as per @ignacio see #407 (diff)

install.bat

@@ -8,6 +8,8 @@ local vars = {}
 vars.PREFIX = nil
 vars.VERSION = "2.2"
 vars.SYSCONFDIR = nil
+vars.SYSCONFFILENAME = nil
+vars.CONFIG_FILE = nil
 vars.TREE_ROOT = nil
 vars.TREE_BIN = nil
 vars.TREE_LMODULE = nil
@@ -360,7 +362,14 @@ local function look_for_headers (directory)
 		die(S"lua.h not found in $LUA_INCDIR")
 	end
 
-	for _, e in ipairs{ S([[\include\lua\$LUA_VERSION]]), S([[\include\$LUA_VERSION]]), [[\]], [[\include\]]} do
+	for _, e in ipairs{ 
+        S([[\include\lua\$LUA_VERSION]]), 
+        S([[\include\lua$LUA_SHORTV]]), 
+        S([[\include\lua$LUA_VERSION]]), 
+        S([[\include\$LUA_VERSION]]), 
+        [[\include\]],
+        [[\]], 
+      } do
 		print("    checking for "..directory..e.."\\lua.h")
 		if exists(directory..e.."\\lua.h") then
 			vars.LUA_INCDIR = directory..e
@@ -583,7 +592,6 @@ vars.LIBDIR = vars.FULL_PREFIX
 vars.LUADIR = S"$FULL_PREFIX\\lua"
 vars.INCDIR = S"$FULL_PREFIX\\include"
 vars.LUA_SHORTV = vars.LUA_VERSION:gsub("%.", "")
-vars.SYSCONFFILENAME = S"config-$LUA_VERSION.lua"
 
 if INSTALL_LUA then
 	if vars.LUA_VERSION ~= "5.1" then
@@ -611,6 +619,8 @@ else
 	datapath = os.getenv("ProgramW6432") .. [[\LuaRocks]]
 end
 vars.SYSCONFDIR = vars.SYSCONFDIR or vars.PREFIX
+vars.SYSCONFFILENAME = S"config-$LUA_VERSION.lua"
+vars.CONFIG_FILE = vars.SYSCONFDIR.."\\"..vars.SYSCONFFILENAME
 vars.TREE_ROOT = vars.TREE_ROOT or datapath..[[\systree]]
 if SELFCONTAINED then
 	vars.SYSCONFDIR = vars.PREFIX
@@ -626,7 +636,7 @@ print(S[[
 
 Will configure LuaRocks with the following paths:
 LuaRocks        : $FULL_PREFIX
-Config file     : $SYSCONFDIR\$SYSCONFFILENAME
+Config file     : $CONFIG_FILE
 Rocktree        : $TREE_ROOT
 
 Lua interpreter : $LUA_BINDIR\$LUA_INTERPRETER
@@ -813,7 +823,7 @@ else
 end
 f:write(S[=[
 site_config.LUAROCKS_UNAME_M=[[$UNAME_M]]
-site_config.LUAROCKS_SYSCONFIG=[[$SYSCONFDIR\$SYSCONFFILENAME]]
+site_config.LUAROCKS_SYSCONFIG=[[$CONFIG_FILE]]
 site_config.LUAROCKS_ROCKS_TREE=[[$TREE_ROOT]]
 site_config.LUAROCKS_PREFIX=[[$PREFIX]]
 site_config.LUAROCKS_DOWNLOADER=[[wget]]
@@ -834,12 +844,11 @@ f:close()
 print(S([[Created LuaRocks site-config file: $LUADIR\luarocks\]]..site_config..[[.lua]]))
 
 -- create config file
-vars.CONFIG_FILE = vars.SYSCONFDIR.."\\"..vars.SYSCONFFILENAME
 if not exists(vars.SYSCONFDIR) then
 	mkdir(vars.SYSCONFDIR)
 end
 if exists(vars.CONFIG_FILE) then
-	local nname = backup(vars.CONFIG_FILE, S"config-$LUA_VERSION.bak")
+	local nname = backup(vars.CONFIG_FILE, vars.SYSCONFFILENAME..".bak")
 	print("***************")
 	print(S"*** WARNING *** LuaRocks config file already exists: '$CONFIG_FILE'. The old file has been renamed to '"..nname.."'")
 	print("***************")