fix(build): check that LuaJIT has required modules for compilation (#16714)

gpanders · web-flow · commit abdf3a8128b7 · 2021-12-18T20:59:02.000-07:00
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.
diff --git 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()
 
