From 8dd6969c54ed0dfb09eb4190373a569602026ad2 Mon Sep 17 00:00:00 2001
From: Andrew Johnston <apjohnsto@gmail.com>
Date: Wed, 18 Feb 2026 00:50:30 +0000
Subject: [PATCH] chore: add CMake option for EV64

---
 CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 06974ea6b..905ca8e15 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,6 +46,11 @@ option(MSAN "Enable MemorySanitizer (MSan)" OFF)
 option(TSAN "Enable ThreadSanitizer (TSan)" OFF)
 option(UBSAN "Enable UndefinedBehaviorSanitizer (UBSan)" OFF)
 
+option(USE_EV64 "Enable event64 support with fast return" OFF)
+if(APPLE AND USE_EV64)
+  add_compile_definitions(EV64)
+endif()
+
 if(MSAN AND NOT CMAKE_C_COMPILER_ID MATCHES "AppleClang|Clang")
   message(SEND_ERROR "MemorySanitizer requires clang. Try again with -DCMAKE_C_COMPILER=clang")
 endif()