From: Gregor Jasny <gregor.jasny@logmein.com>
Date: Sun, 22 Aug 2021 10:49:09 +0000 (+0200)
Subject: feat(cmake): Use standard linker for LTO scenarios
X-Git-Tag: v4.4.1~9^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=82bca69eb7cef937997bf30fac00c46acf8394b7;p=thirdparty%2Fccache.git

feat(cmake): Use standard linker for LTO scenarios
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4cf2e5f3e..bb4b251ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,6 +65,11 @@ if(NOT DEFINED CCACHE_DEV_MODE)
 endif()
 message(STATUS "Ccache dev mode: ${CCACHE_DEV_MODE}")
 
+option(ENABLE_IPO "Enable interprocedural (link time, LTO) optimization" OFF)
+if(ENABLE_IPO)
+  set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ON)
+endif()
+
 include(UseCcache)
 include(UseFastestLinker)
 include(StandardSettings)
@@ -72,11 +77,6 @@ include(StandardWarnings)
 include(CIBuildType)
 include(DefaultBuildType)
 
-option(ENABLE_IPO "Enable interprocedural (link time, LTO) optimization" OFF)
-if(ENABLE_IPO)
-  set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ON)
-endif()
-
 #
 # Configuration
 #
diff --git a/cmake/UseFastestLinker.cmake b/cmake/UseFastestLinker.cmake
index f7e079b4f..b38833cff 100644
--- a/cmake/UseFastestLinker.cmake
+++ b/cmake/UseFastestLinker.cmake
@@ -10,6 +10,11 @@ if(MSVC)
   return()
 endif()
 
+if(ENABLE_IPO)
+  message(STATUS "Using standard linker for IPO")
+  return()
+endif()
+
 if(NOT CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64)
   # Be conservative and only probe for a faster linker on platforms that likely
   # don't have toolchain bugs. See for example