From 337e56d9bfe76ca77ab849f64c018cc28d11c8a1 Mon Sep 17 00:00:00 2001
From: Erik Frojdh <erik.frojdh@gmail.com>
Date: Thu, 23 Apr 2020 08:23:36 +0200
Subject: [PATCH] cleaned up LTO detection

---
 CMakeLists.txt                     | 5 +++++
 slsDetectorSoftware/CMakeLists.txt | 5 ++---
 slsReceiverSoftware/CMakeLists.txt | 4 ++--
 slsSupportLib/CMakeLists.txt       | 6 ++++--
 4 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 917ea805d..682c046bf 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,6 +46,11 @@ option(SLS_BUILD_DOCS "docs" OFF)
 option(SLS_BUILD_EXAMPLES "examples" OFF)
 option(SLS_TUNE_LOCAL "tune to local machine" OFF)
 
+
+#Enable LTO if available
+check_ipo_supported(RESULT SLS_LTO_AVAILABLE)
+
+
 # Use ld.gold if it is available and isn't disabled explicitly
 option(SLS_USE_LD_GOLD "Use GNU gold linker" ON)
 if (SLS_USE_LD_GOLD)
diff --git a/slsDetectorSoftware/CMakeLists.txt b/slsDetectorSoftware/CMakeLists.txt
index 003365f82..568c64a14 100755
--- a/slsDetectorSoftware/CMakeLists.txt
+++ b/slsDetectorSoftware/CMakeLists.txt
@@ -15,9 +15,8 @@ add_library(slsDetectorShared SHARED
     ${HEADERS}
 )
 
-# Do we have link time optimization?
-check_ipo_supported(RESULT LTO_AVAILABLE)
-if(LTO_AVAILABLE)
+
+if(SLS_LTO_AVAILABLE)
     set_property(TARGET slsDetectorShared PROPERTY INTERPROCEDURAL_OPTIMIZATION True)
 endif()
 
diff --git a/slsReceiverSoftware/CMakeLists.txt b/slsReceiverSoftware/CMakeLists.txt
index 9e285f1fe..5e9131484 100755
--- a/slsReceiverSoftware/CMakeLists.txt
+++ b/slsReceiverSoftware/CMakeLists.txt
@@ -29,8 +29,8 @@ add_library(slsReceiverShared SHARED
     ${HEADERS}
 )
 
-check_ipo_supported(RESULT result)
-if(result)
+
+if(SLS_LTO_AVAILABLE)
     set_property(TARGET slsReceiverShared PROPERTY INTERPROCEDURAL_OPTIMIZATION True)
 endif()
 
diff --git a/slsSupportLib/CMakeLists.txt b/slsSupportLib/CMakeLists.txt
index 67cc82d19..6e3dee6b4 100755
--- a/slsSupportLib/CMakeLists.txt
+++ b/slsSupportLib/CMakeLists.txt
@@ -42,11 +42,13 @@ add_library(slsSupportLib SHARED
     ${HEADERS}
 )
 
-check_ipo_supported(RESULT result)
-if(result)
+
+if(SLS_LTO_AVAILABLE)
     set_property(TARGET slsSupportLib PROPERTY INTERPROCEDURAL_OPTIMIZATION True)
 endif()
 
+
+
 target_include_directories(slsSupportLib PUBLIC
     "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
     "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"