From 98d0f5605e65b222ba33106a9f7db089f34647a6 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Tue, 3 Feb 2026 11:32:15 -0700
Subject: [PATCH] enable LTO

Signed-off-by: James Cherry <cherry@parallaxsw.com>
---
 CMakeLists.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dda0ca9d..8ce05b3a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,6 +63,16 @@ message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
 message(STATUS "Build CXX_FLAGS: ${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}}")
 message(STATUS "Install prefix: ${CMAKE_INSTALL_PREFIX}")
 
+# Enable Link-Time Optimization (LTO) for Release builds.
+include(CheckIPOSupported)
+check_ipo_supported(RESULT ipo_supported OUTPUT ipo_error)
+if(ipo_supported)
+  set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE)
+  message(STATUS "IPO/LTO: enabled for Release builds")
+else()
+  message(STATUS "IPO/LTO: not supported - ${ipo_error}")
+endif()
+
 ################################################################
 #
 # Source files.