From 416df1912872d406e2cef4ef2ff57f9373cac7bf Mon Sep 17 00:00:00 2001
From: Ranieri Althoff <1993083+ranisalt@users.noreply.github.com>
Date: Fri, 30 Aug 2024 13:53:35 +0200
Subject: [PATCH] Cleanup enabling IPO in CMake (#4776)

---
 CMakeLists.txt                | 7 ++-----
 src/CMakeLists.txt            | 4 ----
 src/http/CMakeLists.txt       | 4 ----
 src/http/tests/CMakeLists.txt | 4 ----
 src/tests/CMakeLists.txt      | 4 ----
 5 files changed, 2 insertions(+), 21 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5f8c237fb..b9c47d4a18 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -105,15 +105,12 @@ add_executable(tfs ${tfs_MAIN})
 target_link_libraries(tfs tfslib)
 
 ### INTERPROCEDURAL_OPTIMIZATION ###
-cmake_policy(SET CMP0069 NEW)
 include(CheckIPOSupported)
 check_ipo_supported(RESULT result OUTPUT error)
 if (result)
-    set(ENABLE_IPO ON)
-    set_target_properties(tfs PROPERTIES INTERPROCEDURAL_OPTIMIZATION True)
-    message(STATUS "IPO / LTO enabled")
+    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
 else ()
-    message(STATUS "IPO / LTO not supported: <${error}>")
+    message(STATUS "IPO is not supported: ${error}")
 endif ()
 ### END INTERPROCEDURAL_OPTIMIZATION ###
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 072c4807fc..3c09a5a534 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -188,10 +188,6 @@ if (APPLE)
 	target_link_libraries(tfslib PRIVATE Iconv::Iconv)
 endif()
 
-if (ENABLE_IPO)
-	set_target_properties(tfslib PROPERTIES INTERPROCEDURAL_OPTIMIZATION True)
-endif()
-
 if (HTTP)
 	add_subdirectory(http)
 	target_link_libraries(tfslib PRIVATE http)
diff --git a/src/http/CMakeLists.txt b/src/http/CMakeLists.txt
index 11415d8e69..6dc831f10a 100644
--- a/src/http/CMakeLists.txt
+++ b/src/http/CMakeLists.txt
@@ -22,10 +22,6 @@ add_library(http OBJECT ${http_SRC})
 target_link_libraries(http PRIVATE Boost::json)
 set_target_properties(http PROPERTIES UNITY_BUILD ${ENABLE_UNITY_BUILD})
 
-if (ENABLE_IPO)
-	set_target_properties(http PROPERTIES INTERPROCEDURAL_OPTIMIZATION True)
-endif()
-
 if (BUILD_TESTING)
     add_subdirectory(tests)
 endif()
diff --git a/src/http/tests/CMakeLists.txt b/src/http/tests/CMakeLists.txt
index f85c67f702..2ea00c4c63 100644
--- a/src/http/tests/CMakeLists.txt
+++ b/src/http/tests/CMakeLists.txt
@@ -8,9 +8,5 @@ foreach(test_src ${tests_SRC})
     add_executable(${test_name} ${test_src})
     target_link_libraries(${test_name} PRIVATE http tfslib Boost::unit_test_framework)
 
-    if (ENABLE_IPO)
-	    set_target_properties(${test_name} PROPERTIES INTERPROCEDURAL_OPTIMIZATION True)
-    endif()
-
     add_test(NAME ${test_name} COMMAND ${test_name})
 endforeach()
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index 6af27f3267..2e6d1b1a6d 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -12,9 +12,5 @@ foreach(test_src ${tests_SRC})
     add_executable(${test_name} ${test_src})
     target_link_libraries(${test_name} PRIVATE tfslib Boost::unit_test_framework)
 
-    if (ENABLE_IPO)
-	    set_target_properties(${test_name} PROPERTIES INTERPROCEDURAL_OPTIMIZATION True)
-    endif()
-
     add_test(NAME ${test_name} COMMAND ${test_name})
 endforeach()