From abdf3a8128b78fb98ee944bc5d3086c680d779ed Mon Sep 17 00:00:00 2001
From: Gregory Anders <8965202+gpanders@users.noreply.github.com>
Date: Sat, 18 Dec 2021 20:59:02 -0700
Subject: [PATCH] fix(build): check that LuaJIT has required modules for
 compilation (#16714)

Apparently some installations of LuaJIT do not have the "jit.bcsave"
module which is required for pre-compilation. Check that this module
exists before using LuaJIT as luac and if it doesn't, skip compiling
bytecode.
---
 CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2c2587ec0b..2ca2385d8f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -553,7 +553,10 @@ if(NOT WIN32)
       endif()
     endforeach()
   elseif(LUA_PRG MATCHES "luajit")
-    set(LUAC_PRG "${LUA_PRG} -b -s %s -" CACHE STRING "Format for compiling to Lua bytecode")
+    check_lua_module(${LUA_PRG} "jit.bcsave" LUAJIT_HAS_JIT_BCSAVE)
+    if(LUAJIT_HAS_JIT_BCSAVE)
+      set(LUAC_PRG "${LUA_PRG} -b -s %s -" CACHE STRING "Format for compiling to Lua bytecode")
+    endif()
   endif()
 endif()