From f53cc032db69d1bf5c1af102eb83da7773f0e079 Mon Sep 17 00:00:00 2001
From: Randy <45701928+RandyShuai@users.noreply.github.com>
Date: Thu, 24 Jan 2019 19:29:05 -0800
Subject: [PATCH] Rashuai/link with ltcg (#378)

* compile with GL&LTCG

* remove tab

* restrict flag to only relwithdebinfo

* enable all OPT flags for relwithdebinfo
---
 cmake/CMakeLists.txt | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 0be7f80919..4cbac7107d 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -118,6 +118,7 @@ if (MSVC)
   SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc")
   #Disable 4100 globally. Too many this kind errors in protobuf
   SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4100")
+  SET (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS} /GL")
 else()
   if(onnxruntime_BUILD_FOR_NATIVE_MACHINE)
     string(APPEND CMAKE_CXX_FLAGS_RELEASE " -march=native -mtune=native")
@@ -340,11 +341,12 @@ if (WIN32)
 
     # set linker flags to minimize the binary size.
     if (MSVC)
-      foreach(type EXE SHARED)    
-        set(CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO} /OPT:REF")
+      foreach(type EXE SHARED)
+        set(CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO} /OPT:REF,ICF,LBR")
         set(CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO} /INCREMENTAL:NO")
+        set(CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_${type}_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
       endforeach()
-    endif()      
+    endif()
 else()
   add_definitions(-DPLATFORM_POSIX)
   # Enable warning in Linux