From 28389ee271b78f9fd1dfac659ab14c56d4cce8b7 Mon Sep 17 00:00:00 2001
From: Christian Ruppert <idl0r@qasl.de>
Date: Tue, 28 Jun 2022 10:03:00 +0200
Subject: [PATCH] BUILD: Makefile: Add Lua 5.4 autodetect

This patch is based on:
https://www.mail-archive.com/haproxy@formilux.org/msg39689.html
Thanks to Callum Farmer!

Signed-off-by: Christian Ruppert <idl0r@qasl.de>
(cherry picked from commit 3214b44702d4a4fb7564f8561396fb96d40e3881)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
---
 INSTALL  | 6 +++---
 Makefile | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/INSTALL b/INSTALL
index 7476df230..92daeefe1 100644
--- a/INSTALL
+++ b/INSTALL
@@ -329,9 +329,9 @@ Lua is an embedded programming language supported by HAProxy to provide more
 advanced scripting capabilities. Only versions 5.3 and above are supported.
 In order to enable Lua support, please specify "USE_LUA=1" on the command line.
 Some systems provide this library under various names to avoid conflicts with
-previous versions. By default, HAProxy looks for "lua5.3", "lua53", "lua". If
-your system uses a different naming, you may need to set the library name in
-the "LUA_LIB_NAME" variable.
+previous versions. By default, HAProxy looks for "lua5.4", "lua54", "lua5.3",
+"lua53", "lua". If your system uses a different naming, you may need to set the
+library name in the "LUA_LIB_NAME" variable.
 
 If Lua is not provided on your system, it can be very simply built locally. It
 can be downloaded from https://www.lua.org/, extracted and built, for example :
diff --git a/Makefile b/Makefile
index c852d9d6f..c18bef9d9 100644
--- a/Makefile
+++ b/Makefile
@@ -104,7 +104,7 @@
 #   LUA_LIB        : force the lib path to lua
 #   LUA_INC        : force the include path to lua
 #   LUA_LIB_NAME   : force the lib name (or automatically evaluated, by order of
-#                                        priority : lua5.3, lua53, lua).
+#                                        priority : lua5.4, lua54, lua5.3, lua53, lua).
 #   OT_DEBUG       : compile the OpenTracing filter in debug mode
 #   OT_INC         : force the include path to libopentracing-c-wrapper
 #   OT_LIB         : force the lib path to libopentracing-c-wrapper
@@ -648,11 +648,11 @@ OPTIONS_CFLAGS  += $(if $(LUA_INC),-I$(LUA_INC))
 LUA_LD_FLAGS := -Wl,$(if $(EXPORT_SYMBOL),$(EXPORT_SYMBOL),--export-dynamic) $(if $(LUA_LIB),-L$(LUA_LIB))
 ifeq ($(LUA_LIB_NAME),)
 # Try to automatically detect the Lua library
-LUA_LIB_NAME := $(firstword $(foreach lib,lua5.3 lua53 lua,$(call check_lua_lib,$(lib),$(LUA_LD_FLAGS))))
+LUA_LIB_NAME := $(firstword $(foreach lib,lua5.4 lua54 lua5.3 lua53 lua,$(call check_lua_lib,$(lib),$(LUA_LD_FLAGS))))
 ifeq ($(LUA_LIB_NAME),)
-$(error unable to automatically detect the Lua library name, you can enforce its name with LUA_LIB_NAME=<name> (where <name> can be lua5.3, lua53, lua, ...))
+$(error unable to automatically detect the Lua library name, you can enforce its name with LUA_LIB_NAME=<name> (where <name> can be lua5.4, lua54, lua, ...))
 endif
-LUA_INC := $(firstword $(foreach lib,lua5.3 lua53 lua,$(call check_lua_inc,$(lib),"/usr/include/")))
+LUA_INC := $(firstword $(foreach lib,lua5.4 lua54 lua5.3 lua53 lua,$(call check_lua_inc,$(lib),"/usr/include/")))
 ifneq ($(LUA_INC),)
 OPTIONS_CFLAGS  += -I$(LUA_INC)
 endif