https://github.com/dolphin-emu/dolphin/pull/12986
https://github.com/dolphin-emu/dolphin/commit/9c5cd817e39b44ff2eb68c75d9405c582207b53b

From 9c5cd817e39b44ff2eb68c75d9405c582207b53b Mon Sep 17 00:00:00 2001
From: mitaclaw <140017135+mitaclaw@users.noreply.github.com>
Date: Thu, 8 Aug 2024 09:42:14 -0700
Subject: [PATCH] CMakeLists: Fix LLVM Usage In UICommon

This compile definition was removed in 68cbd2640d4663fe29e21234dc068769cb9bc673 because it was complicated by changes in 50dc0ffbceebe0f633bd63cd4710a3e2f548d688. Thus, the LLVM disassembler would never be used in UICommon's Disassembler class.
--- a/Source/Core/UICommon/CMakeLists.txt
+++ b/Source/Core/UICommon/CMakeLists.txt
@@ -56,6 +56,7 @@ if(ENABLE_LLVM)
   find_package(LLVM CONFIG)
   if(LLVM_FOUND)
     message(STATUS "LLVM found, enabling LLVM support in disassembler")
+    target_compile_definitions(uicommon PRIVATE HAVE_LLVM)
     # Minimal documentation about LLVM's CMake functions is available here:
     # https://releases.llvm.org/16.0.0/docs/CMake.html#embedding-llvm-in-your-project
     # https://groups.google.com/g/llvm-dev/c/YeEVe7HTasQ?pli=1
@@ -69,6 +70,7 @@ if(ENABLE_LLVM)
     llvm_config(uicommon USE_SHARED
       mcdisassembler target ${LLVM_EXPAND_COMPONENTS}
     )
+    target_include_directories(uicommon PRIVATE ${LLVM_INCLUDE_DIRS})
   endif()
 endif()