From b8bbe920b83c8ba6722ccebdefe3605e3fac9111 Mon Sep 17 00:00:00 2001
From: crueter <crueter@eden-emu.dev>
Date: Tue, 23 Sep 2025 14:42:59 -0400
Subject: [PATCH] whole-program opt

Signed-off-by: crueter <crueter@eden-emu.dev>
---
 CMakeLists.txt                | 20 +++++++++++++++-----
 src/core/CMakeLists.txt       |  4 ----
 src/video_core/CMakeLists.txt |  4 ----
 3 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc1427eda8..37ddf040d2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -147,7 +147,11 @@ if (MSVC OR ANDROID)
     set(EXT_DEFAULT ON)
 endif()
 
-CMAKE_DEPENDENT_OPTION(YUZU_USE_EXTERNAL_SDL2 "Compile external SDL2" ${EXT_DEFAULT} "ENABLE_SDL2;NOT MSVC" OFF)
+if (ENABLE_SDL2)
+    # TODO(crueter): Cleanup, each dep that has a bundled option should allow to choose between bundled, external, system
+    CMAKE_DEPENDENT_OPTION(YUZU_USE_EXTERNAL_SDL2 "Compile external SDL2" OFF "NOT MSVC" OFF)
+    option(YUZU_USE_BUNDLED_SDL2 "Download bundled SDL2 build" "${MSVC}")
+endif()
 
 cmake_dependent_option(ENABLE_LIBUSB "Enable the use of LibUSB" ON "NOT ANDROID" OFF)
 
@@ -185,8 +189,6 @@ option(YUZU_USE_PRECOMPILED_HEADERS "Use precompiled headers" ${EXT_DEFAULT})
 # TODO(crueter): CI this?
 option(YUZU_DOWNLOAD_ANDROID_VVL "Download validation layer binary for android" ON)
 
-# TODO(crueter): Cleanup, each dep that has a bundled option should allow to choose between bundled, external, system
-CMAKE_DEPENDENT_OPTION(YUZU_USE_BUNDLED_SDL2 "Download bundled SDL2 build" "${MSVC}" "ENABLE_SDL2" OFF)
 
 CMAKE_DEPENDENT_OPTION(YUZU_ROOM "Enable dedicated room functionality" ON "NOT ANDROID" OFF)
 
@@ -197,6 +199,14 @@ CMAKE_DEPENDENT_OPTION(YUZU_CMD "Compile the eden-cli executable" ON "ENABLE_SDL
 CMAKE_DEPENDENT_OPTION(YUZU_CRASH_DUMPS "Compile crash dump (Minidump) support" OFF "WIN32 OR LINUX" OFF)
 
 option(YUZU_ENABLE_LTO "Enable link-time optimization" OFF)
+if(YUZU_ENABLE_LTO)
+    include(CheckIPOSupported)
+    check_ipo_supported(RESULT COMPILER_SUPPORTS_LTO)
+    if(NOT COMPILER_SUPPORTS_LTO)
+        message(WARNING "LTO is not supported!")
+    endif()
+    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ${COMPILER_SUPPORTS_LTO})
+endif()
 
 option(YUZU_DOWNLOAD_TIME_ZONE_DATA "Always download time zone binaries" ON)
 
@@ -888,7 +898,7 @@ if (YUZU_USE_FASTER_LD)
     find_program(LLD lld)
 
     if (LLD)
-        set(LINK_PROGRAM lld)
+        set(LINKER lld)
     endif()
 
     # GNU appears to work better with mold
@@ -896,7 +906,7 @@ if (YUZU_USE_FASTER_LD)
     if (CXX_GCC)
         find_program(MOLD mold)
         if (MOLD AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "12.1")
-            set(LINKER mold)
+            # set(LINKER mold)
         endif()
     endif()
 
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 6b64ab7820..3aad2c4b29 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -1274,8 +1274,4 @@ if (YUZU_USE_PRECOMPILED_HEADERS)
     target_precompile_headers(core PRIVATE precompiled_headers.h)
 endif()
 
-if (YUZU_ENABLE_LTO)
-  set_property(TARGET core PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
-endif()
-
 create_target_directory_groups(core)
diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 642494016e..27c8ed9c1d 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -399,10 +399,6 @@ if (YUZU_USE_PRECOMPILED_HEADERS)
     target_precompile_headers(video_core PRIVATE precompiled_headers.h)
 endif()
 
-if (YUZU_ENABLE_LTO)
-  set_property(TARGET video_core PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
-endif()
-
 if (ANDROID AND ARCHITECTURE_arm64)
     target_link_libraries(video_core PRIVATE adrenotools)
 endif()